Dab tsi yog Chrome plating: cov txheej txheem, hom thiab cov txiaj ntsig

Dab tsi yog Chrome plating: cov txheej txheem, hom thiab cov txiaj ntsig

Chrome plating - yog cov txheej txheem ntawm electroplating ib qho hluav taws xob ntawm cov hlau lossis yas nto txhawm rau txhim kho nws cov tsos kom zoo dua qub, hardness thiab corrosion tsis kam. Nws yog siv rau cov hom phiaj zoo nkauj xws li cov khoom siv hluav taws xob, cov khoom siv hauv tsev, thiab hauv cov ntawv thov ua haujlwm nrog rau cov cuab yeej siv thiab cov cuab yeej muaj. Kab lus no qhia txog yuav ua li cas Chrome plating ua haujlwm, cov hom phiaj loj, cov txiaj ntsig thiab cov kev siv kom yuam kev los txiav txim siab rau txoj kev plating.

Chrome plating yog dab tsi?

Chromium plating, tseem hu ua chromium plating, yog ib txheej txheem ua tiav nyob rau hauv uas ib qho txheej nyias ntawm cov hlau roj chromium yog electroplated rau cov khoom siv. Tsuas yog muab tso rau, lub plhaw tau muab tso rau hauv cov tshuaj electrolyte uas muaj cov tshuaj tsw qab (feem ntau chromic acid) thiab siv hluav taws xob tam sim no rau tso cov chromium mus rau saum npoo. Qhov tshwm sim yog qhov ci iab, nyuaj, thiab nplaum chrome txheej uas tau sib khi ntawm cov theem molecular mus rau lub substrate (feem ntau yuav chrome-plated tom qab npaj tshwj xeeb).

Visually, nws muab qhov sib txawv, kaj, tsom iav zoo li ua tiav. Ua haujlwm, txawm tias ib tug nyias chrome luav txhim kho cov khoom saum npoo av; Nws nce ib qho kev tawv thiab hnav tsis kam, tiv thaiv kev tiv thaiv kev xeb thiab tuaj yeem ua rau lub ntsej muag kom yooj yim.

Ib nyuag keeb kwm ntawm chrome plating

Qhov kev tshawb pom ntawm chromium raws li lub zog plating cov khoom siv rau thaum cov txheej txheem kev lag luam sterrium hauv xyoo 1907. Txawm li cas los xij, ua tsaug rau cov txheej txheem kev lag luam supridium

Xyoo 1970 thiab 1980s tau muaj kev hloov pauv ntawm kev lom zem ntawm Hexavalent Chomium coj mus rau ib puag ncig kev nyab xeeb nyob thoob ntiaj teb. Qhov kev tshawb fawb no tau txais kev tshawb fawb no mus rau kev sib tw chromium plating, uas muaj kev nyab xeeb thiab lwm txoj kev phooj ywg zoo.

Yuav ua li cas Chrome plating ua haujlwm

Chrome plating yog ua los ntawm cov electroplating, siv lub hluav taws xob tam sim no los tso cov hlau los ntawm kev daws teeb meem.

Hauv kev teeb tsa ib txwm, tsab xov xwm yuav tsum tau plated yog ua los ntawm ib tug cathode (feem ntau yog elomium da dej) yog ib qho kev raus dej

Thaum ib qho ncaj qha tam sim no tau dhau los ntawm kev daws teeb meem, zoo them cov roj ntsha lit yog txo thiab muab tso rau ntawm cathode (workpiece). Sij hawm dhau los, ib txheej nyias nyias ntawm cov ntaub ntawv chromium nyob rau saum npoo ntawm cov khoom.

Npaj ua ntej thov chrome plating

Cov hluav taws xob no feem ntau yog ua tom qab kev kho mob kom ntseeg tau zoo adhesion. Feem ntau, kev npaj suav nrog:

1. Kev tu thiab degreasing

Tshem tawm cov av, roj, roj lossis lwm yam kev paug los ntawm qhov chaw. Txawm tias cov chaw seem me me tuaj yeem tiv thaiv cov txheej txheej los ntawm kev ua yeeb yaj kiab, ua rau cov peeting lossis blistering.

2. Nto Polishing

Rau kev ua kom zoo nkauj plating, lub hauv paus hlau feem ntau yog polished rau txoj kev du ua ntej plating, txij li lub chrome txheej yog nyias thiab yuav muaj kev cuam tshuam rau hauv qab nplaim.

3. Etching / Ua kom muaj zog

Ib feem ntub dej yog raug rau kev ua kom muaj zog (feem ntau hauv dilute acid) rau micro-etch lub npoo. Qhov no tsim cov ntxhib me ntsis, reactive nto uas pab cov txheej li Chrome.

4. Primer

Qee lub sij hawm tuag-cam khwb cia zinc lossis alloys tooj liab tau ntaus ua ntej npib tsib xee yog thov rau tus tooj liab. Ua kom corrosion tsis kam thiab pab kom ua tiav cov khaub ncaws ci. Primer tsis yog feem ntau siv tshwj tsis yog muaj cov teeb meem tshwj xeeb ntawm kev nyuaj chrome plating ntawm ferrous hlau seem.

Cov tsis muaj txiaj ntsig thaum thov Chrome plating

Chromium plating - yog cov txheej txheem zoo heev nyob ntawm kev tswj hwm ntawm ntau qhov tseem ceeb.

1. Tam sim no ceev

Qhov ceev tam sim no yog hais txog qhov ntau ntawm hluav taws xob tam sim no siv rau ib chav dej thaj chaw ntawm qhov chaw ua haujlwm. Nws txiav txim siab tus nqi ntawm cov chromium yog thov: qis ceev ceev tam sim no tuaj yeem ua rau kev pab them qeeb thiab tsis sib luag. High tam sim no ceev yuav ua rau kub nyhiab, pitting lossis cov chaw ntxhib.

Raug li ntau: rau cov nkauj chrome - 4-10 A / DM2, rau qhov nyuaj chrome- 20-60 A / DM2.

2. Chav dej kub

Tsawg dhau, txo cov txheej ceev thiab cov nplaum tsis zoo. Siab dhau, nce kev qhib volatility, da in infability thiab ntxhib tso nyiaj.

Qhov zoo tshaj plaws: los ntawm 45 Qib rau 60℃(los ntawm 113℃f rau 140℃f)

3. Txheej Sij Hawm

Lub sijhawm txheej txheej txiav txiav txim siab tag nrho tuab ntawm cov txheej chrome.

Ua ntawv thov cov khoom dai chrome: ~ 30 vib nas this mus rau ob peb feeb, thov siv lub chrome nyuaj: ob peb feeb rau teev, nyob ntawm qhov xav tau ua tiav

4. Da dej

Qhov kev daws teeb meem feem ntau muaj:

• Chromic acid (cro₃): qhov tseem ceeb ntawm chromium ions
• Catalysts: Tswj cov txheej ua tau zoo thiab tso tawm cov khoom, piv txwv li sulfuric acid los yog profrietary additives
• Ntxiv Ntxiv: Txhim Kho Qhov ci, Hardness, Microstructure

5. Stirring thiab pom

Huab cua purging los yog cov kev txawj ntse yog ib qho muaj. Lub sijhawm kev ntxhov siab tseem ceeb txawm tias kev faib tawm ntawm lub workpiece, thaum lub sij hawm tshem tawm cov kuab paug uas tuaj yeem ua rau muaj kev paug lossis txawv ntom nti.

Cov hau kev theem pib ntawm Chrome plating

Chromium plating cov txheej txheem tuaj yeem nthuav dav los ntawm cov tshuaj valence ntawm cov chromium siv nyob rau hauv lub plating da dej. Nws muaj peb txoj kev tseem ceeb:

1. Hexavalent Chromium plating (CRR)

Hexavalent chromium plating plating - yog cov txheej txheem ib txwm muaj uas tau siv txij li xyoo 1920s. Nws yog raws li cov chromic acid (cro₃) hauv kev daws, qhov twg chromium yog nyob rau hauv {}} ecidation xeev, li lub npe hexavalent.

Tshuaj Muaj Tshuaj

Hexavalent chromium plating da muaj feem ntau ntawm cov chromic acid nrog ib qho me me ntawm cov sulfuric acid ua catalyst. Cov chav dej no ua haujlwm ntawm PHL (~ 0) thiab xav kom muaj qhov kub (35-55 degree). Txawm li cas los xij, cov kev tawm tsam plating nyob rau hauv cov tshuab hexavalent yog tsis muaj zog, nrog tsuas yog 10-20% ntawm lub zog hluav taws xob siv los tso cov chromium hlau.

Qhov Zoo

• Kev ntseeg tau ua pov thawj los ntawm ntau tshaj ib xyoos ntawm kev siv khoom
• High Wardness (Feem Ntau 800-1000 Vickers)
• Zoo heev corrosion
• Iconic tsom iav tiav nrog me ntsis bluish tint.
• Tawv tso nyiaj tsim cov microcracks uas tuaj yeem pab tau rau lubrication.

Qho khuam

• Uneven txheej tuab yog qauv.
• Cov tshuaj lom thiab carcinogenic sib txuas ua ke ua rau muaj kev hem thawj loj.
• Tsawg Cathode kev ua tau zoo hauv cov nqi qis
• Cov kev pab cuam tsis zoo hauv kev sib tw vim {-} txwv pov pov muaj peev xwm

2. Trivalent Chromium plating (CR3⁺)

Truntic Chromium plating siv chromium nyob rau hauv + 3.}} oxidation xeev thiab tau dhau los ua kev nyab xeeb rau kev hloov pauv ntawm hex chromium nrog ntau tsawg toxicity.

Chemistry thiab cov txheej txheem thev naus laus zis

Kev siv hluav taws xob chromium feem ntau yog siv chromium sulfate lossis chromium chloride li thawj qhov chaw sawv cev thiab cov khoom sib ntxiv ntawm tus tswv. Lawv pab ua kom ruaj khov cr3⁺ hauv kev daws teeb meem thiab tiv thaiv nws los ntawm oxidizing mus rau lom neeg lub caij nplooj ntoo.

Qhov Zoo

• Tseem muaj kev nyab xeeb dua hexavalent txheej.
• Siab dua Cathode efficiency thiab nrawm dua txheej ceev ceev.
• Muab ntau txawm tias duav ntawm cov duab ua si thiab cov chaw ua haujlwm

Qho khuam

• Kev txo cov tshuaj tiv thaiv corrosion tsis kam piv rau Hex Chrome ntawm cov tuab sib npaug.
• Nce cov rhiab rau cov av thiab nws yog xim hlau impurities tuaj yeem ua tau txoj haujlwm ntawm da dej.
• Ntau cov tshuaj chemistry ntau dua, xav tau cov txheej txheem tswj ntau dua.

3. Cua chromium plating (cr2⁺)

Divaluab chromium plating plating - Khib xas sim tshiab uas siv chromium hauv lub xeev oxidation {}} (cr2⁺). Tab sis qhov no tsis yog cov txheej txheem kev lag luam thoob plaws, feem ntau vim tias CR2⁺ yog qhov tsis ruaj khov hauv cov kev daws teeb meem aqueous thiab nrawm nrawm dua (CR3TALTENT (CRRES).

Txawm li cas los xij, nyob ib ncig ntawm 2020, cov kws tshawb nrhiav pom tau cov teb ruaj khov ntawm cov tshuaj chromium ruaj khov (CRCL₂) hauv dej ntawm cov dej siab. Siv cov tuab tam sim no (piv txwv li tam sim no (piv txwv li tam sim no ~ 20 ma / cm2) thiab ceev faj kev cais tawm ntawm oxygen, vibrant chromium cov chav da dej tau pom. Yog tias zoo tag nrho, nws tuaj yeem muab ib qho kev sib sau ua peb chrome plating uas ua ke qee qhov zoo ntawm kev sib tw (qis toxicity) nrog kev ua haujlwm siab.

Kev sib piv: Cru vs. Cr3⁺

Ntau hom chrome plating

Chrome plating tuaj yeem ua kom haum rau ob qho zoo nkauj tsos thiab kev ua haujlwm tau zoo. Hauv qab no yog cov pawg dav dav:

1. Hniav chrome plating

Hniav chrome, kuj yog cov txheej nyias nyias npaj rau feem ntau rau kev ua kom zoo nkauj thiab kev tiv thaiv corrosion ntau dua li cov hnav tseem ceeb. Nws yog nkig: 0.05 txog 0.5 microns, kwv yees li 2-20 microinches. Tsuas yog txaus muab nws cov xeeb ntxwv Bluish ci ci ci.

Feem ntau thov hauv HoxaTent Chromium da dej ntawm qis dua kub (~ 40 degrees c) los tsim kom muaj qhov ci ci. Txheej lub sijhawm luv vim cov txheej txheej yog nyias, feem ntau tsuas yog 1-5 feeb ntawm daim ntawv thov. Feem ntau pom nyob rau hauv audotive trim, kav dej conmstures, thiab cov khoom siv hauv tsev / tsev.

2. Hard chrome plating

Zog chrome, tseem hu ua Chrome lossis Industrial Chrome, feem ntau 0.020 nti, yog siv los muab cov yam ntxwv ua haujlwm xws li coj kev sib tw tiv thaiv, thiab kev sib txhuam ntawm kev rov kho dua.

Lub ntsiab kom zoo ntawm kev nyuaj chrome yog nws qhov nyuaj heev (txog 65-70 hrc). Feem ntau siv rau hauv hydraulic lub tog raj kheej lub tog raj kheej, pistons thiab tshuab cuab yeej. Zog chrome tuaj yeem muaj txiaj ntsig zoo ntawm ib qho uas swb, rotates, lossis yog rov qab sib cuag kom tiv thaiv kev ua yeeb yaj kiab, galling, lossis hnav.

Txheej txheem: Feem ntau ua nyob rau hauv hexavant Chomium Da Dej ntawm ~ 50}} 60 Degree C nrog qhov tseem ceeb tam sim no dua li kev ua kom zoo nkauj plating. Daim ntawv thov ntawm txheej yuav siv sijhawm ntev, txij li ob peb teev mus rau yav tsaus ntuj, kom ua tiav qhov xav tau tuab. Zog chrome tsis muaj daim iav tiav tom qab txheej. Nws yog feem ntau yog ib nrab teeb rau matte grey.

3. Nyias ntom chrome plating

Nyias ntom chrome (tdc) - yog daim ntawv tshwj xeeb ntawm kev nyuaj chrome plating cwj pwm (tej zaum yuav nyias tso nyiaj (tej zaum 2-8-8 μm). Lub hardness zoo ib yam li ntawd ntawm kev nyuaj chrome (~ 800 + hv), muab kev tiv thaiv corrosion. Vim tias nws tsis muaj lub microcracks ib txwm, nws feem ntau muab cov teeb meem thaiv zoo dua ib micron ntawm thickness tshaj cov pa chrome.

Nws yog feem ntau siv nyob rau hauv precision titing, aerospace Cheebtsam, khoom siv kho mob thiab cov pwm. Ib qho piv txwv yog Armoloy tus txheej txheem patented {}}}}}}}}}}} chemical siv rau ntawm cov pwm thiab cov khoom siv tshuab kom txo kev sib txhuam thiab hnav.

Txheej Txheem: TDC plating feem ntau ua tau siv hloov kho hexavalent lossis cov chaw da dej chromium nyob rau hauv nruj kub, tam sim no ceev thiab ntxiv. Qhov tshwm sim yog satin-du, nyias txheej uas ua kom khov kho.

4. Nyem -} chrome plating

Nyem Chrome - yog cov txheej nyias nyias, feem ntau tsuas yog 1-5 microns. Nws yog feem ntau npaj rau cov tshuaj pleev ib ce lossis cov ntawv thov uas yuav tsum muaj cov chromium tsawg tsawg yuav tsum muaj kev tiv thaiv cov tarnish. Nws tsis yog tuab txaus kom txo cov kev hnav lossis corrosion ntawm nws tus kheej.

Txheej Txheem: Flash Chrome Plating tuaj yeem ua tiav nyob rau hauv tus qauv hexavalent plating da, tab sis nrog ob peb feeb mus rau ob peb feeb. Feem ntau pom ntawm cov cuab yeej siv me me, cov cuab yeej thiab cov fasteners, los yog ua qhov nyem kawg ntawm cov khoom yas.

5. Satin Chrome Phaj

Satin chrome - yog qhov zoo nkauj ua tiav nrog lub matte lossis satin {{matte tiav hloov chaw li ib txwm ua tiav. Satin Chrome yog tsim los ntawm kev hloov cov qauv ntawm cov hauv paus ua ntej thov ib txheej ntawm chrome. Qhov no tuaj yeem ua tiav siv:

• Nickel substrate nrog me me microparticles rau lub teeb tawg.
• Sab saum toj kho tshuab txhuam hniav lossis tshuaj tua blasted ua ntej chrome daim ntawv thov.
• Cov tshuaj ntxiv tshwj xeeb rau cov da dej uas hloov cov qauv ntawm cov txheej chrome.

Nws muab kev tiv thaiv corrosion zoo li chrome thaum tseem tswj kom nrov, thiab tseem tuaj yeem nrov rau cov cuab yeej uas tsis yog-glare ua tiav yog kev ua kom tiav, xws li wrapes lossis snap-rau ntawm cov cuab yeej.

6. Dub Chrome Plating

Tsis zoo li cov xim dub lossis hmoov txheej, dub chrome yog siv los ntawm electroplating, feem ntau dhau ib txheej ntawm tsib xee. Cov xim dub tau tiav los ntawm kev kho cov chemistry ntawm plating da nrog cov kab mob ntxiv xws li cov qauv crystalline ntawm cov khoom siv chromium. Qhov tshwm sim yog qhov ruaj khov, dub xim hlau txheej uas yog nruj nreem rau lub substrate.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm Dub Chrome yog nws lub peev xwm los nqus lub teeb thiab txo nws txaus siab rau cov twj paj nruag kho, defense tsheb thiab khoom kim heev tsheb. Nyob rau tib lub sijhawm, nws muab cov hardness thiab corrosion tsis kam, tshwj xeeb tshaj yog thaum siv rau ob-txheej npib tsib xee thiab sab saum toj coated.

Txawm li cas los xij, dub chrome feem ntau yog thinner chrome thiab nws cov kav ntev tsis haum rau kev muaj cov khoom siv hnyav ua haujlwm rau kev ua haujlwm siab. Cov kev coj ua cov xim xim kuj tseem tuaj yeem sib txawv nyob ntawm tus txheej txheem thiab tshooj Geometry, yog li cov txheej txheem tswj nruj heev yog qhov tsim nyog.

7. Chrome plating nrog microcracks

Feem ntau, chromium plating yog inherly tau raug rau tawg raws li txias vim kev ntxhov siab sab hauv. Microcrack Chrome txhob txwm ua rau muaj pes tsawg ntawm cov kab nrib pleb los ntawm kev ua txhua qhov me me me me thiab kaw ua ke.

Хром с микротрещинами полезен для износа и смазки. Плотная сеть трещин может задерживать смазочные материалы, что отлично подходит для гидравлических цилиндров, поршневых штоков и компонентов двигателя, которые нуждаются в постоянной смазке. Он также используется в высококачественном декоративном хроме для автомобильной промышленности, где микротрещины хрома (>1000 nrib pleb rau ib nti) ntawm cov kab tsib xee yog txheem los muab cov tshuaj zoo sab laj.

8. Microporous chrome plating

Microporous chomium yog hais txog chromium nrog microcacks, tab sis hloov ntawm cov kab nrib pleb ntawm micron-teev pinholic pinholes rau saum npoo.

Qhov no feem ntau yog ib txwm ua tiav los ntawm kev tso ib txheej ntawm nickel muaj cov khoom zoo, tsim cov plaub hau npib uas muaj ntau txhiab tus pores me me lossis nodules. Thaum Chrome yog thov rau saum, lub chrome yuav muaj kev txheeb xyuas microscopic lossis qhov sib txawv ntawm cov qauv nplej hauv cov chaw ntawd.

Cov txiaj ntsig tseem ceeb yog corrosion tsis kam, feem ntau nyob rau hauv qhov chaw siab thiab txhua daim ntawv thov uas corrosion siab tshaj plaws lub neej yog qhov tseem ceeb.

9. Composite Chrome plating

Composite Chrome plating, kuj tseem hu ua particle reactfed chrome plating, yog cov khoom ua haujlwm xws li ceramics, carbides yog sib koom ua ke rau hauv ib txheej txheem plating. Qhov tshwm sim yog cov txheej txheem sib xyaw uas sib xyaw ua ke ntawm qhov chaw tawv tawv thiab corrosion tsis kam ntawm chomium nrog kev txhim kho hnav, kev sib txhuam lossis cov hluav taws xob ntawm cov khoom siv.

Qhov no yog suav tias yog thaum lub zog chrome tsis txaus. Ib qho ntawm cov ntawv sau tseem ceeb ntawm - diesel cav piston piston yog rau cov cav loj. Tsis tas li ntawd, Cheebtsam ib qho, cov khoom siv hydraulic, lossis pwm uas tuaj yeem ua rau cov hnav hnyav yuav tau txais txiaj ntsig.

Qhov zoo ntawm Chrome plating,

1. Ntu sib xyaw ua haujlwm

Chrome plating, uas ntxiv ib txheej ntawm nyuaj, inert hlau, tiv thaiv cov khoom siv hauv paus los ntawm hnav thiab corrosion.

2. Cov tawv tawv zoo heev thiab hnav tsis kam

Lub chromium voltage yog kwv yees li 800-1000 hv thiab tuaj yeem nce qhov saum npoo hardness ntawm ib feem.

3. Kev tiv thaiv corrosion

Chromium, feem ntau tshaj li Nickel, muab kev tiv thaiv zoo tshaj plaws rau noo noo, ntau cov tshuaj thiab oxidation.

4. Kev thov kom zoo nkauj

Qhov ci, tsom iav zoo li lub ntsej muag zoo li Chrome zoo nkauj. Nws muab cov khoom lag luam superb polished, muaj kev cuam tshuam zoo.

5. Cua Sov Resistance

Hard chromium tswj hwm nws lub hardness thiab resistions oxidation txawm tias nyob rau hauv cov kev siv hluav taws xob ntau xws li lub cav hluav taws xob thiab phom phom.

6.Kev ntxuav

Cov du, tsis muaj-ntxeem nto tawm tsam stains thiab cov kab mob, ua rau nws ntxuav tau yooj yim thiab zoo rau kev siv chav dej thiab cov cuab yeej kho mob.

7. Kev Sib Tw Tsawg

Zog chrome muaj ib tug lowally tsis muaj kev sib txhuam ntawm kev sib txhuam, feem ntau nyob ib ncig 0.1-0.2 thaum lubricated, uas yog qis dua ntau cov hlau.

8. Lub plawv (rau tawv chrome)

Cov kab muaj cov khoom muaj peev xwm hloov nrog lub zog chrome los kho qhov ntev, uas feem ntau pheej yig dua li ua cov ntu tshiab.

Qhov tsis zoo ntawm Chrome plating

Chrome plating kuj tseem muaj pes tsawg qhov tsis zoo uas yuav tsum tau coj mus rau hauv tus account:

1. Ib puag ncig thiab kev noj qab haus huv teeb meem

Ib qho ntawm qhov tsis zoo tshaj plaws ntawm Chrome plating yog qhov lom ntawm hexavalent chromium (CRRO). Qhov tsim nyog fume extraction, kev ua haujlwm kev nyab xeeb thiab tshuaj lom neeg pov tseg yog qhov tseem ceeb kom ua raws li.

2. Cov nqi haujlwm siab

Chrome plating txheej txheem tsis haum rau txhua daim ntawv thov. Kev tsim cov tshuaj muaj kev phom sij yuav tsum tau siv cov khoom siv cov khoom siv uas nce qib ntxiv. Ib qho ntxiv, Chrome cov txheej txheej feem ntau yuav tsum muaj peev xwm tseem ceeb hauv cov cuab yeej.

3. Brittleness thiab kev pheej hmoo ntawm kev tawg

Zog chrome, tshwj xeeb tshaj yog thaum ua ntawv thov hauv txheej tuab, tuaj yeem tawg tau. Qhov no nce txoj kev pheej hmoo ntawm microcacks lossis tev vim kev ntxhov siab lossis cua sov cycling. Daws cov teeb meem no feem ntau yuav tsum tau tshaj tawm sanding thiab txheej txheej tuab, uas nce ntau ntau lub sijhawm thiab cov nqi.

4. Nyuaj nrog cov geometry

Chrome plating yog inherently ib txoj kab-ntawm-pom cov txheej txheem, yog li ua kom tiav cov kab zoo li sab hauv qhov lossis sib sib zog nqus yog qhov nyuaj.

Cov ntaub ntawv dab tsi yuav siv tau rau chrome plating?

Chrome plating tuaj yeem siv rau ntau yam ntawm cov khoom siv hauv paus, tab sis tsis yog txhua cov ntaub ntawv yooj yim li chrome plating. Cov laj thawj suav nrog:

1. Hlau thiab Cam Khwb Cia Hlau

Qhov no yog cov khoom siv ntau tshaj plaws. Cov hlau me me, hlau, alloy steel, pob zeb Alloy, Kab Hlau Hlau, Etc. Yuav Tsum Tau Siv AFRICAST ETCHING, NTXIV ECTRO-tu, Tom qab phaj plating.

2. Stainless hlau

Nws tuaj yeem yog chrome plated, txawm hais tias passive oxide txheej ntawm stainless hlau ua rau cov nplaum nyuaj. Feem ntau kho nroog tshwj xeeb yog siv rau cov ntoo ua ntej kom ntseeg tau tias chrome adheres.

3. Tooj thiab tooj liab alloys

Tooj liab cov phiaj ntawv yog yooj yim heev rau kev siv raws li lawv yog tus neeg saib xyuas zoo. Thaum plating ncaj qha rau tooj liab / tooj dag, tooj liab cyanide filings yog qee zaum siv ua ntej rau adhesion, ces npib tsib xee, ces chrome.

4. Zinc alloys

Zinc muaj peev xwm plated nrog chrome, tab sis saum npoo yuav tsum yog qhov zoo. Txhawm rau lub cim thiab tsho tiv no lub zinc, lub tooj tawm tooj liab feem ntau yog siv, ua raws li daim ntawv tuab me me, npib tsib xee thiab chrome.

5. Aluminium thiab aluminium alloys

Aluminium tsis tuaj yeem cuam tshuam nrog electropated vim tias nws tam sim ntawd ua ib txheej oxide txheej. Feem ntau, feem ntau undergoes galvanizing cov txheej txheem, tom qab ntawd ib txheej ntawm electrodeless tooj liab lossis npib tsib xee tau thov.

6. Plastics

Yas nws tus kheej tsis yog kev coj ua, tab sis nws tuaj yeem etched mus roughen rau rougically txheej uas tsis yog siv hluav taws xob tsis muaj hluav taws xob lossis tooj liab ua kom nws ua tau.

7. Lwm cov hlau

Npib tsib xee thiab nickel alloys tuaj yeem ua tiav chrome plated. Titanium thiab cov hlau nplaum ua tau, tab sis lawv nyuaj rau lub phaj vim - tawv oxides.

Yuav ua li cas xaiv Txoj kev pluction plating?

Xaiv txoj cai Chrome txheej txheem plating plating plating plating ntawm cov hauv qab no:

1. Rau cov tsos

Hniav chrome plating yog qhov zoo tshaj plaws thaum lub hom phiaj yog los txhim kho kev pom kev pom thaum muab cov kev ua kom haum. Bright chrome dhau Nickel tsim cov iav-zoo li ua tiav, thaum satin lossis dub chrome tsim cov softer lossis ntau qhov txawv txav. Cov nyias nyias nyias koob tshuaj pleev tau khaws zoo kom zoo thiab feem ntau siv ntawm kev txiav, cov khoom tawg thiab lwm yam pom.

2. Rau cov coj tsis kam

Lub zog chrome plating yog nyiam rau cov ntu uas muaj kev sib txhuam siab lossis xav tau kev kho kom rov qab los. Nyias, ntom chrome kom ntseeg siab heev thiab qhov chaw dawb. Txheem nyuaj chrome muab lub neej tshaj plaws lub neej thiab tuaj yeem machined tom qab. Zog chrome nrog microcacks lossis microporosity yog qhov tsim nyog rau cov ntawv thov uas cov roj ceev lossis nce zog lub neej yog qhov tseem ceeb.

3.Qhov ntawm cov khoom siv hauv paus

Tsuas yog nyias zoo nkauj chrome tuaj yeem siv rau cov khoom yas, feem ntau tshaj cov khaubncaws sab nraud tooj liab thiab npib tsib xee. Aluminium thiab zinc alloys feem ntau yuav tsum muaj cov primers tshwj xeeb xws li zincate lossis tooj liab tawm tsam. Stainless hlau yuav yog plated nrog nyuaj chrome, tab sis yuav tsum tau ib npib tsib xee plating kom ntseeg tau cov adchesion.

4. Kev txiav txim siab ntawm ib puag ncig

Cov hom phiaj no muaj kev nyab xeeb dua rau cov laj thawj zoo nkauj vim nws tsim cov pa pa tsawg dua. Hauv cov xwm txheej nrog txoj hlua daws, cov roj chromium dawb xws li HVOF lossis electrodeless nickel platings tej zaum yuav haum haum.

5. Nyob ntawm Thickness thiab Zam Txim

Yog tias qhov tsis tuaj yeem muab cov tuab ntawm ntau dua li ob peb lub microns, nyem - chrome lossis nyias tuab chrome yuav tsum tau siv. Rau qhov uas xav tau ib qho tseem ceeb tsim ntawm cov khoom siv, Txheem Ward Chrome yog ib qho ntawm ob peb txoj kev ua kom tuab, ntev ntev.

Daim ntawv thov cov chaw ntawm Chrome plating

Nyob rau hauv lub tshuab tsheb, nws muab lub zog ua tiav, zoo ua tiav los txiav, cov roj ntsha thiab lub log tawv, thaum lub teeb nyuaj Hauv kev tsim khoom thiab cov cuab yeej hnyav Machinery, nws tiv thaiv cov cuab yeej, ua kom haum rau kev puas tsuaj thiab kev kho mob hauv qab, muab cov kev pabcuam ntev thiab seem ntev.

Aerospace cov ntawv thov suav nrog cov txheej txheej ntawm tsaws iav, cov actuatator thiab kev txuas thiab kev txuas nrog hydraulic los withstand tej kev thauj khoom thiab ib puag ncig. Hniav chrome kuj tuaj ntawm cov kav dej xau xws li cov kais dej thiab da dej thiab da dej, muab lawv cov kev cuam tshuam, corrosion-resistant tiav. Nyob rau tib lub sijhawm, nws pab tsim kom cov du, complex thiab sterilizes chaw rau cov twj thiab cov khoom siv kho mob tshwj xeeb.

Cov khoom siv twg yuav tsum tau thov chrome plating?

Los ntawm cov pob zeb loj me me rau cov khoom muaj cov txheej loj {}}}} Xav tau cov khoom siv tau - yog tib yam:

1. Tank Txheej

Chrome plating ua tiav nyob rau hauv acid-resistant tso tsheb hlau luam, feem ntau yog ua los ntawm txhuas-lined yas lossis hlau. Rau kev nyuaj chrome, tso tsheb hlau luam feem ntau ntsug, cylindrical lossis duab plaub. Kab rov tav los yog ntev tso tsheb hlau luam nrog qhib qhib yog siv rau sheathing coils thiab loj seem.

2. Khoom Siv Hluav Taws Xob (Rectifier)

Lub DC Rectifier yuav tsum tau hloov ACS Mains zog rau hauv cov hluav taws xob tsawg, muaj zog dC rau txheej daim ntawv thov. Muaj peev xwm xa tawm tas mus li, Ripple-dawb tam sim no thiab feem ntau muaj kho lub zog kom precisely tswj kev tswj tam sim no.

3. Shelving thiab fixtures

Cov seem yog mounted ntawm kev coj ua tau sawv ntsug lossis khoom siv uas ua haujlwm li kev txhawb nqa thiab cov ntsiab lus. Feem ntau ua los ntawm tooj liab lossis tooj dag, cov posts no yog coulating nrog insulating cov ntaub ntawv xws li cov ntsiab lus sib cuag kom paub txog hluav taws xob conduction.

4. Anodes

Lub anodes raug tshem tawm nyob rau hauv lub tank thiab txuas nrog cov txiaj ntsig zoo ntawm lub rectifier. Nyob rau hauv hexavalent chromium plating, lub anodes yog feem ntau cov phiaj los yog pas nrig ntawm cov hluav taws xob insoluble txhuas uas yog siv hluav taws xob ntev. Kev siv tshuaj kub me ntsis qee zaum siv anodes lossis titanium anodes nrog cov hlau sib xyaw vim tias hmoov txhuas tuaj yeem paug cov chav dej no.

5. Cov khoom siv ua ntej

Ua ntej chrome yog siv, feem ntau mus los ntawm cov kab ua ntej nrog ob peb lub tso tsheb hlau luam. Qhov no suav nrog segase degreasing (rhuab), electrocleaning (alkaline tov (alkaline tov nrog tam sim no), cov kua qaub ua pa tawm thiab ntau cov tshuaj ntxuav tawm. Hnav cov pluction chrome yuav tsum muaj tooj liab ntxiv thiab Nickel Primer tso tsheb hlau luam, txhua tus nrog nws tus kheej anode khoom thiab ncaj system.

6. Kev tso pa tawm thiab tswj tau

Plating nrog hexavalent chromium ua cov tshuaj lom chromic acid mist; Txheej kev tso tsheb hlau hlau tau nruab nrog tso cov phuam qhwv uas tso pa tawm rau cov tshuab txhuam cov tshuab, feem ntau yog siv cov dej-based merus eliminators. Niaj hnub tshiab lub tshuab yuav ntxiv cov tshuaj tsis huv huab los yog ntab yas hlaws los ua kom txo qis aerosol tiam ntawm qhov chaw.

Yuav Ua Li Cas Tshem Tawm Chrome Plating

Muaj ntau txoj hauv kev los tshem tawm Chrome plating, muaj ntau txoj kev suav nrog kev sib tsoo tshuab, tshuaj stripping, thiab rov qab plating.

1. Kev tshem tawm kho tshuab

Kev tshem tawm txhua yam muaj qhov zoo uas nws tsis siv tshuaj phom sij. Txawm li cas los xij, qhov no tuaj yeem yog cov sijhawm siv sijhawm thiab muaj peev xwm hloov pauv qhov ntev lossis qhov ua tiav. Cov hau kev xws li:

• Kev ua tsis muaj abrasive

Sandblasting lossis blasting tuaj yeem ua kom zoo tshem cov chromium los ntawm corrooring nws. Qhov no yog qhov zoo rau kev thov tuab, nyuaj chrome rau cov chaw ruaj khov thiab rau ntu uas tuaj yeem ua polished tom qab.

• Kev sib tsoo

Chrome yog qhov nyuaj thiab yuav tsum tau yuam; Silicon carbide lossis aluminium oxide abrasives yog siv. Cov ntu tiaj yuav tuaj yeem ua tau cov xuab zeb siv xuab zeb lossis cov khau khiab. Txhawm rau thov cov khoom zoo nkauj chrome rau cov khoom, khw feem ntau polish lub chrome thiab npib tsib xee nyob rau hauv kev npaj rau rov ua.

• Kev Tu Tshuab Ultrasonic

Kev nqus tshuaj ultrasonic siv cov khoom siv hluav taws xob siab tsis muaj kua los tsim cavitation, uas tshem cov txheej txheej ntawm qhov chaw zoo.

2. Tshuaj lom zem

Tshuaj lom neeg cov qauv siv feem ntau yog siv rau kev siv hlau; Lawv yaj lub chromium txheej siv reagents:

• Acid Stripping (hydrochloric acid)

Raus cov chrome yog nyob rau hauv da dej ntawm ~ 30-40% hcl. Cov kua qaub yuav hnov ​​mob nrog cov txheej chromium los tsim solule chromium chloride thiab tau tshem tawm zoo. HCL stripping ua haujlwm tau zoo ntawm kev ua kom zoo nkauj chrome thiab tsis muaj cov nyhuv ntau rau ntawm npib tsib xee lossis tooj liab plating.

• Alkaline Stripping (sodium hydroxide)

Cov hauv paus muaj zog xws li sodium hydroxide (Naoh) tseem tuaj yeem tshem cov chromium. Tab sis nws feem ntau siv los tshem cov chromium los ntawm hlau. Nws yog ua kom ua ntau qeeb dua li cov kua qaub thiab muaj tsawg dua kev pheej hmoo ntawm hydrogen embrittlement tshaj li acid.

3. Rov qab electroplating

Rov qab plating, lossis elecolytic stripping, siv hluav taws xob txuas ntxiv kom yaj cov chromium ntawm ib feem ntawm kev thim rov qab cov txheej txheem plating.

Ib qho kev teeb tsa siv ib qho chromic acid / sulfuric acid da dej, tab sis feem yuav raug tshem tawm yog tam sim no txuas raws li anode. Lwm cov electrolyte siv rau kev hloov pauv rov qab yog sodium hydroxide (caustic dej qab zib) nrog ib qho me me ntawm oxidizing tus neeg sawv cev.

Qhov zoo dua ntawm kev thim rov qab electroplating yog tias nws tso cai rau cov duab sib xyaw kom tau muab tso tawm uniformly thiab tuaj yeem tswj tau. Txawm li cas los xij, nws siv tib yam cov teeb meem tshuaj ua cov npog, yog li PPE thiab cov pa tau yuav tsum muaj.

Yuav Kho Chrome Plating

Nws yog qhov ua tau kom rov ua dua phrome plating cov khoom uas yav tas los tau dhau Chrome plated, cov txheej txheem dav dav yog raws li hauv qab no:

1. Tshem cov chrome qub

Cov txheej txheej chromium uas twb muaj lawm yuav tsum tau muab tso tawm siv cov tshuaj lossis hluav taws xob txheej txheem kom tsis txhob muaj qhov seem tsis muaj qhov seem. Yog tias daim ntawv muaj ntau txheej (chrome dhau nickel dua tooj liab), feem ntau tsawg kawg ntawm Chrome yuav raug tshem tawm.

2. Kho Ntawm Cov Hlau Hlau

Yog hais tias lub hauv paus hlau raug puas tsuaj, nws yog kho rau lwm tom ntej. Rau ib daim hniav zoo nkauj, ib qho recores nyob rau hauv lub hauv paus yuav qhuav qhuav los vim - Raug los ntawm vuam lossis tshiab txheej tuab.

3. Nto npaj

Lub hauv paus yog npaj tau li tshiab, ntxuav, polished thiab ua kom - txhua yam seem yog kho raws li lub hauv paus hlau.

4. Rov Txheej Txheej Txheej

Qhov ib feem mus los ntawm cov theem ntawm plating, tej zaum cov tooj liab thiab npib tsib xee, ces chrome plating, lossis nyuaj chrome plating rau ib qho kev lag luam. Qhov tseem ceeb, qhov no yog tib yam li kev thov txheej txheem rau ib feem tshiab.

5. Kawm tiav

Ib zaug txheej, feem ntau yuav ua polished rau cov laj thawj zoo nkauj lossis machined rau kev ua haujlwm kom ua tiav qhov xav tau ua tiav thiab qhov ntev.

Cov khoom tsis xws hauv Chrome plating

Thaum muab cov khoom txig zoo tshaj plaws, chrome plating tuaj yeem ua rau tus naj npawb ntawm qhov tsis xws luag yog tias raug tua tsis zoo lossis raug rau qhov tsis tsim nyog.

1. Peeling

Ib qho ntawm qhov tsis xws luag nyob rau hauv - plating yog thaum pib txheej, ua rau blomister thiab chrome flaking. Kev ua tsis taus txaus, kev ua haujlwm tsis zoo lossis tsis muaj txheej tiv thaiv yog lub chaw ua haujlwm loj.

Yuav kho qhov no li cas? Xyuas kom meej cov degreing, acid anticasting thiab tsim nyog thov kev tiv thaiv cov ntaub ntawv rau cov khoom tiv thaiv nyuaj rau kev tua hydrogen. Tig ntawm qhov tam sim no maj mam kom tsis txhob muaj kev sib tw saum npoo av.

2. Cov kev pab them tsis tau

Hexavalent Chromium plating paub paub tias muaj peev xwm qis qis, uas ua rau tsis muaj qhov tsis sib xws. Qhov no txhais tau tias chrome me me heev tuaj yeem nyob hauv cov ces kaum, sib sib zog nqus lossis lub qhov hnyav yuav ua rau cov npoo thiab chaw tsheb.

Cov kev daws teeb meem suav nrog kev siv cov pab pawg anuxiliary lossis lub sijhawm ntev dua ntawm cov qis dua mus txog thaj chaw ntawm qhov chaw ceev tam sim no.

3. Ulceration

Cov roj ntsha tshwm tuaj li cov pinholes me me, craters, lossis me me tsaus nti ntawm cov npoo npog. Qhov no tuaj yeem tshwm sim los ntawm av, roj lossis roj npuas (feem ntau yog hydrogen) uas tiv thaiv dependition rau hauv cov chaw hauv zos. Kev tsis muaj da dej lossis cov npoo siab tseem muaj cov ntsiab lus.

Txhawm rau zam kev pitting, huv si kom huv si kom tshem cov npuas, siv cov tshuaj tiv thaiv ntub dej hauv cov tshuaj muaj kev nyab xeeb, thiab lim cov tshuaj kom tshem tawm cov khib nyiab.

4. Combusction

Kev sib txuas yog hais txog qhov ceev ntau dhau los yog qhov kub uas kub uas ua rau kev nkag siab tsis tau thiab roj hloov pauv. Cov roj tuaj yeem nkag mus rau lub sediment thiab tig nws dub nrog oxides. Qhov no feem ntau tshwm sim ntawm cov npoo ntse lossis cov ces kaum qhov twg tam sim no muaj ntau yam.

Yuav ua li cas kho nws: txo qhov ceev tam sim no lossis nce da dej kub. Siv cov thaiv hniav ntawm ntug lossis hloov Part geometry los txo cov kev pom tam sim no ntawm cov ces kaum. Qhov chaw hlawv loj yuav tsum tau muab tshem tawm thiab hloov nrog cov tshiab.

5. Roughning / granular tso nyiaj

Lub Chrome nto tshwm ntxig lossis tsis sib xws, qee zaum nrog mis nyuj los yog matte. Qhov no feem ntau yog tshwm sim los ntawm kev sib kis hauv cov plating da, xws li hmoov av, lossis corrosion los ntawm kev ua yeeb yam. Ib qho ntxiv, tig ntawm qhov tam sim no ua ntej mus txog qhov ceev tam sim no ntawm kev sib sau ua ke tam sim no tuaj yeem ua rau tsim los ntawm dendritic "ntoo zoo li" kev tsim qauv.

Yuav kho qhov no li cas? Nco ntsoov tias da dej yog lim zoo thiab tswj hwm, saib xyuas cov qib sulfate, thiab saib xyuas anode corrosion. Thov tam sim no tsuas yog tom qab ib feem yog muab raus hauv dej. Txiav txim siab siv cov auxiliary anodes lossis txo qhov ceev tam sim no hauv cov cheeb tsam siab tam sim no kom tsis txhob tag nrho cov kab.

6.Kev tawg

Vim li cas qhov no tshwm sim: nyuaj chrome ib txwm ua rau microcracks tsim tawm, tab sis tuab dhau ib txheej kev yuav ua rau macrosion tiv thaiv.

Cov kev daws teeb meem suav nrog ntau txheej ntawm kev sib tw nrog kev tawm mus ua tiav, kho cov kab mob da dej) los txo kev ntxhov siab los txo kev ntxhov siab.

7.Xim Hloov

Hloov chaw, chrome, uas yuav tsum ci thiab bluish - cov nyiaj, tshwm sim daj, ntsuab, lossis xim av. Qhov no yuav yog qhov tsis zoo ntawm qhov tsis zoo ntawm cov kab tsib xee, raws li zoo nkauj chrome yog heev me me thiab pom zoo txheej hauv qab. Kev siv cua ntau dhau thaum siv kuj yuav ua rau xiav lossis daj discoloration vim oxidation.

Yuav kho qhov no li cas? Ua kom cov Nickel Primer yog glossy kom zoo thiab polished heev ua ntej plating. Zam txhob overheating seem thaum siv lossis ua tom ntej.

8. Chromium Leaching lossis Green Stains

Yog tias qhov chaw tsis yog rinsed kom zoo tom qab txheej, residual chromic acid yuav tsum tawm thiab ua rau staining lossis ua rau staining lossis ua rau staining lossis ua rau. Cov pob ntsuab lossis cov paib ntawm corrosion uas tshwm sim teev lossis hnub tom qab daim ntawv thov ntawm txheej, feem ntau ncig qhov chaw lossis kev txom nyem.

Yuav Txhim Kho nws li cas: Txhim kho koj cov kev ntxuav cov txheej txheem thiab suav nrog kev faib ua ke tom qab coating kom tshem tawm cov khoom seem los tshem tawm cov ntawv tshaj tawm chromic acid. Them nyiaj tshwj xeeb rau cov qhov tob tob lossis cov geometries uas muaj kev daws teeb meem.

9. Nickel tiv thaiv ib ncig ntawm cov npoo

Hniav chrome chrome ua ntawv thov hauv cov khaubncaws sab nraud nyias yuav luag pob tshab. Piv txwv cov txheej txheej yog dhau lawm nyias lossis tsis sib luag. Hauv qhov no, txheej npib tsib xee nyob hauv qab yuav qhia tau los ntawm cov noob daj lossis sov sov, tshwj xeeb yog cov npoo ntse lossis cov chaw nyuaj.

Yuav ua li cas kho nws: ua kom zoo plating thickness thiab siv cov qauv xauv los txhim kho lub chrome plating, tshwj xeeb tshaj yog nyob rau thaj chaw ntawm ntug thiab recess. Nco ntsoov xyuas cov khaub ncaws tsis sib xws thaum muaj kev tsim nyog.

Yuav ua li cas xim dhau chrome plating

Nws muaj peev xwm thov cov xim hla chrome plating; Cov theem hauv qab no yuav pab koj ua tiav qhov ua tiav ntev.

1. Ntxuav lub ntsej muag kom huv si

Pib los ntawm kev tshem tawm tag nrho cov av, roj thiab roj los ntawm cov chrome nto. Tom qab tu, qhuav lub ntsej muag kom huv si nrog daim ntaub pub dawb.

2. Xuab zeb lub Chrome

Daim iav tiav ntawm lub chrome tiv thaiv kom zoo adhesion. Siv 220 mus rau 320 grit sandpaper rau xuab zeb tag nrho saum npoo tusyees, roughening nws yog li primer yuav ua raws li tau txais txiaj ntsig zoo.

3. Thov tus kheej tus kheej etching primer

Tus qauv cov qauv tsis ua raws li Chrome. Hloov chaw, siv tus kheej etching primer uas muaj acidic sib txuas uas yuav coulound uas cov tshuaj lom neeg rau cov hlau.

4. Siv lub luag haujlwm hnyav (yeem)

Yog tias qhov saum npoo muaj qhov tsis txaus ntseeg lossis xav tau theem ntxiv, siv cov primer zoo tshaj ntawm cov txheej etching. Thaum qhuav, maj mam xuab zeb saum npoo nrog 400-600 grit daim ntawv los tsim lub hauv paus kom zoo rau cov xim.

5. Ua cov xim siv cov xim siv hlau-sib xws

Xaiv cov xim rau cov hlau sib tsoo, xws li acrylic enamel, urethane lossis xim kho tsheb. Thov ob peb lub tsho nyias nyias hloov chaw ntawm ib lub tsho tiv no tuab, tso cai rau lub sijhawm kom qhuav ntawm lub tsho tiv no.

6. Thov ib lub tsho tiv no tiv thaiv (pom zoo)

Ua tiav nrog lub tsho loj hauv qab los txhim kho lub sijhawm ruaj khov thiab tiv thaiv chipping lossis fading. Cov txheej txheem urethane los yog cov acrylic coings muab cov UV zoo tshaj, tshwj xeeb yog rau sab nrauv lossis hnav cov khoom-resistant.

Puas yog Chrome plating?

Tus nqi ntawm chrome plating tuaj yeem sib txawv heev nyob ntawm ntau yam; Yog tsis muaj ib tus nqi:

1. Chrome plating hom

Hniav chrome plating feem ntau yog tsis kim dua vim tias nws siv thinner txheej thiab yog thov hla lub npib tsib xee. Lub zog chrome plating yog kim kim vim -} thicker platings thiab meej tswj.

2. Ib feem loj thiab geometry

Qhov ntau dua lossis ntau qhov kev ua haujlwm nyuaj yuav tsum tau npaj ua ntxiv thiab sijhawm sijhawm ntev dua. Sib sib zog nqus grooves, xov lossis recesses tseem nce nqi.

3. Cov kev npaj khoom saum npoo

Qhov chaw nrog xeb, cov chrome qub lossis kev puas tsuaj yuav tsum tau muab tshem tawm thiab ntxuav ua ntej txheej. Sandblasting lossis polishing nce lub sijhawm ua haujlwm thiab cov nqi.

4. Cov khoom siv rov qab

Qee cov hlau, xws li txhuas, yuav tsum muaj kev kho mob tshwj xeeb lossis txheej ntawm npib tsib ua ntej chrome yog thov, uas nce tus nqi.

5. Chromium Txheej Thickness

Thicker txheej (xws li ua rau Chrome) yuav tsum tau ntau lub sijhawm thiab cov khoom siv, ua rau tus nqi siab dua.

6. Batch Loj

High-ntim cov txheej txheem txo tus nqi ntawm txhua feem los ntawm kev teeb tsa zoo thiab kev lag luam ntawm nplai.

Cov khoom siv tau tshuaj dab tsi uas muaj feem cuam tshuam nrog hauv chrome plating?

Chromium plating cov ntsiab feem ntau muaj chromium cov ntsiab lus thiab cov tshuaj lom neeg kom ua kom tau txais daim ntawv thov ntawm electroplating. Lub ntsiab tseem ceeb tivthaiv yog chromic acid (cro₃), uas ua kom muaj kev tso nyiaj ntawm chromium ions rau ntawm substrate.

Thaum ua ntawv thov hexavalent chromium plating, tus da dej muaj chromic acid nrog me me ntawm sulfuric acid raws li catalyst txhim kho cov ntawv thov. Hauv kev sib tw chromium plating, cov chromium sulfate yog chromium sulfate lossis chromium chloride, ua ke nrog cov khoom siv tsis sib xws thiab tswj cov ph. Cov tshuaj ntxiv ntxiv xws li cov tshuaj tiv thaiv ntub dej, cov tshuaj ntxuav ua kom muaj zog, lossis cov tshuaj ntxuav qoob loo tuaj yeem suav nrog cov txheej xim zoo nkauj, tawv ncauj, lossis cov nplaum.

Kev Lag Luam Kev Lag Luam rau Chrome Plating

Chrome cov txheej txheem yuav yuav tsum ua kom haum nruj qauv kev lag luam kom paub tseeb tias zoo, kev nyab xeeb thiab khoom lag luam. Cov Qauv Tseem Ceeb suav nrog:

• ASTM B177 / B177M - Qhia rau Chrome Electroplating Technology
• ASTM B650 - Kev qhia tshwj xeeb rau Electrodeposited Chromium txheej ntawm sab nrauv Automotive ib feem
• Ams 2460 - Aerospace Cov Khoom Siv Tshwj Xeeb rau Kev nyuaj Chrome plating
• ISO 1456: 2009 - Txheej Txheem Hlau, Cov Txheej Txheem Hluav Taws Xob ntawm Nickel, Chromium thiab tooj rau cov hom phiaj zoo nkauj
• Ncav / ROHS Ua Raws - Cov Qauv Ib puag ncig Txwv kev siv cov khoom muaj kev puas tsuaj xws li hexavalent chromium hauv Tebchaws Europe

Lwm txoj hauv kev Chrome plating

Hauv qab no yog qee cov kev xaiv rau Churome plating, nrog rau lawv cov txiaj ntsig tseem ceeb thiab txiav txim siab.

1. Electrodess Nickel Plating

Electrodeless Nickel Plating tso cai rau koj thov ib npib tsib xee-phosphorus alloy txheej rau ib qho chaw tsis muaj kev siv hluav taws xob sab nraud tam sim no. Hloov chaw, kev tso tawm tshwm sim raws li kev siv tshuaj lom neeg nyob rau hauv ib tug plating da dej.

Cov txiaj ntsig: sib txuam tuab txawm tias muaj cov kev phom sij ua rau muaj kev phom sij thiab corrosion thiab qis dua ib puag ncig kev pheej hmoo ntau dua li hexavalent chromium.

2. Zinc Txheej

Zin Electroplating siv ib txheej nyias nyias ntawm zinc rau steel lossis hlau feem los tiv thaiv lawv los ntawm corrosion. Zinc ua raws li cov txheej txheem kev fij uas corrodes ua ntej cov hlau pib ua.

Cov txiaj ntsig zoo: Kev lag luam, muaj ntau yam yooj yim thiab thov nrog kev kho mob tom ntej xws li kev tiv thaiv corrosion.

3. Hmoov Txheej

Hmoov txheej siv hluav taws xob siv hluav taws xob siv cov hmoov kom qhuav uas tau txau mus rau ib feem thiab kho nrog cov txheej tiv thaiv ceev.

Pros: eco-phooj ywg (tsis muaj voc), muaj nyob rau ntau yam xim thiab textures, huab cua zoo thiab cuam tshuam tsis kam.

4. Anodizing

Anodizing - yog cov txheej txheem electrochemical uas txheej ntawm aluminium txheej txheej thiab tsis kam thiab hnav.

Qhov Zoo: Kev tiv thaiv me ntsis, tuaj yeem pleev xim rau ntau cov xim thiab muaj cov nplaum zoo rau cov xim tsev thiab cov nplaum.

5. PVD (Lub Cev Vapor Deposition) Txheej Txheem

Pvd {{0 - Txheej txheej xws li titanium nitride (tin) lossis chromium nitride (Crn) tau thov siv cov khoom siv cov khoom txheej txheem.

Cov txiaj ntsig zoo: Tsis ntev los no, ib puag ncig tus phooj ywg sib piv rau hauv electroplating, muaj hauv cov xim hlau xws li kub, dub lossis nyiaj.

Tag

Chrome plating tseem muaj cov txheej txheem txhim khu kev qha rau kev ua tiav ntawm kev sib npaug ntawm kev ua kom zoo nkauj, hardness thiab corrosion tsis kam. Thaum RedExpart tsis muab lub plhaw chrome ua ib feem ntawm kev sib tw ib leeg, kom koj cov khoom sib xyaw ua ke raug cai thiab nrog cov txheej tiv thaiv kom raug.

Cov lus nug thiab cov lus teb

Q1: Yuav ua li cas tuab yog chrome plating?

Lub thickness ntawm dai chrome plating feem ntau 2-20 microns (0.002-0.02 mm). Lub zog chrome plating, siv rau kev lag luam hnav thiab corrosion tiv thaiv, muaj li ntawm 50 txog 250 microns (0.05 rau 0.25 mm). Hauv kev ua haujlwm hnyav nws tuaj yeem tshaj 250 microns.

Q2: Ntev npaum li cas chrome plating feem ntau yuav siv?

Daim ntawv thov kev dai cov plhaw chrome feem ntau yuav siv sijhawm li 30 feeb mus rau 1 teev, raws li nws tau thov nyob rau hauv ib txheej ci ntsa iab. Hard chrome plating tuaj yeem siv sijhawm ntau teev los thov, tshwj xeeb tshaj yog rau cov cua daj muaj cua hlob.

Lo lus nug 3: Ntev npaum li cas Chrome plating kawg?

Siv chrome plating yuav nyob rau txhua qhov chaw ntawm 3 txog 20+ xyoo, nyob ntawm seb hom plating, ib puag ncig raug, tuab thiab txij nkawm. Ntawm no yog dab tsi cuam tshuam nws txoj kev pabcuam lub neej:

Hnav chrome plating (siv rau cov neeg siv khoom): feem ntau kav 3-7 xyoo ua ntej pom cov cim ntawm pitting, tarnishing, lossis corrosion, tshwj xeeb yog thaum raug saib xyuas huab cua lossis kev saib xyuas tsis zoo.

Hard chrome plating (siv hauv kev lag luam): Tau kav ntev li 10-20 xyoo lossis ntau dua ntawm kev txav chaw xws li hydraulic rods lossis tuag, vim nws txoj kev hnav zoo tshaj plaws thiab corrosion tsis kam.

Q4: Puas yog Chrome plating puas xeb?

Chrome plating nws tus kheej tsis xeb, raws li chrome yog ib txwm tiv taus corrosion. Txawm li cas los xij, yog tias txheej txheej txheej ua txhaum vim yog khawb, tawg lossis hnav, noo noo thiab huab cua tuaj yeem nkag mus rau cov hlau hauv qab, uas yuav corrode.

Q5: Puas yog Chrome Plating?

Yog lawm, chrome plating yog cov khoom siv hluav taws xob, tab sis qhov kev coj ua me me yog qis dua qhov ntawm cov hlau, tshwj xeeb yog cov txheej yog nyias lossis oxidized. Cov khoom siv hluav taws xob lossis kob tshuab feem ntau tsis siv chromium tshwj tsis yog tias tsim tshwj tsis yog tias nws tuaj yeem ua kom muaj zog lossis hnav dhau sijhawm.