Chrome plating kev kho mob tuaj yeem siv ob qho tib si rau kev kho kom zoo nkauj thiab txhim kho cov khoom siv thiab kev ua haujlwm ntawm cov khoom ua haujlwm. Rau cov khoom siv hlau, cov txheej txheem txheej txheej no yog qhov tshwj xeeb, vim nws txo qhov kev pheej hmoo ntawm kev puas tsuaj corrosion. Cov cuab yeej siv tsis yog hauv kev lag luam nkaus xwb, tab sis kuj tseem nyob hauv kev lag luam ntiag tug - piv txwv li, los kho thiab tiv thaiv sab nrauv ntawm lub tsheb. Yuav ua li cas chrome hlau hauv tsev? Muaj ntau ntau txoj hauv kev uas siv tau, txhua tus muab rau nws tus kheej kev siv nuances, tab sis kuj tseem muaj cov kev cai dav dav rau kev teeb tsa cov txheej txheem no.
Npaj ib feem rau chrome plating
Qhov zoo ntawm cov txheej txheej ncaj qha nyob ntawm qhov chaw ua haujlwm. Nws yuav tsum tsis tsuas yog ntxuavlos ntawm cov av thiab plua plav, thiab raug kev kho tshuab nrog abrasives. Cov tshuab sib tsoo yuav tsum tshem tawm qhov tsis zoo ntawm qhov teeb meem hauv daim ntawv ntawm kev puas tsuaj me me, nplai, xeb thiab kab ntawm cov xim qub. Cov qauv ntawm lub hauv paus ntawm cov khoom yuav tsum nyob ncaj qha rau ntawm qhov chaw. Qhov no yog ib qho kev npaj yooj yim nyob rau hauv uas koj tuaj yeem chrome hlau hauv tsev, cia siab tias yuav tau txais txiaj ntsig zoo. Tsis tas li ntawd, kev saib xyuas tshwj xeeb yog them rau cov roj tsis tu ncua, uas tseem cuam tshuam nrog cov txheej txheem ntawm kev thov chromium. Yam tsawg kawg nkaus, cov tshuaj hnyav hnyav, cov dej ntxhia lossis roj av yuav tsum tau siv rau kev kho mob no. Txhawm rau kom muaj txiaj ntsig zoo ntawm kev ntxuav los ntawm cov roj thiab roj cov yeeb yaj kiab, cov kws tshaj lij kuj pom zoo kom siv cov khoom xyaw raws li caustic soda, silicate kua nplaum thiab dej qab zib tshauv, preheating lawv nrog kub tswj txog li 85-90 ºС.
Cov txheej txheem txheej txheem
Nyob rau hauv cov txheej txheem ntawm chrome plating, tsis hais txog ntawm txoj kev siv, kev tso tawm cov pa phem yog inevitable, yog li nyob rau hauv lub quarters yuav tsum tam sim ntawd tso tseg. Qhov chaw zoo tshaj plaws yog chav nres tsheb, chav siv hluav taws xob lossis lwm chav ua haujlwm. Tab sis tsis yog tag nrho. Nws yog ib qho tsim nyog yuav tau xav txog qhov ua kom ruaj khov nrog kev tso pa tawm. Nws yog tsis yooj yim sua rau cia siab rau tej huab cua, vim hais tias muaj teeb meem tshuaj muaj feem xyuam rau lub sij hawm ua hauj lwm. Yuav ua li cas chrome hlau hauv tsev tsis ua rau muaj kev phom sij rau kev noj qab haus huv? Txawm tias muaj qhov cua, cov cuab yeej tiv thaiv tus kheej yuav tsum tau npaj. Cov khoom siv yuav tsum muaj xws li kev tsim kholooj tsom iav dub, lub tshuab ua pa, apron thiab hnab looj tes roj hmab coated.
Npaj lub thawv rau chrome plating
Txawm li cas los xij, txhawm rau ua cov txheej txheem, koj yuav xav tau chav da dej kom haum rau qhov ua haujlwm daws teeb meem. Nyob ntawm qhov loj ntawm qhov, 3-liter hub, phiab, tank lossis da dej classic tuaj yeem siv. Qhov tsuas yog txwv tsis pub ntawm kev xaiv yog cov khoom siv - iav lossis hlau uas tsis nkag mus rau hauv cov tshuaj tiv thaiv nrog cov electrolyte. Tom ntej no, koj yuav tsum tau nrog kev npaj ntawm lub thawv xaiv. Ua ntej, nws yuav tsum tau muab tso rau ntawm ib theem nto thiab tsau nyob rau hauv ib tug ruaj khov txoj hauj lwm kom cov chromed hlau yog tusyees coated. Qhov thib ob, nyob rau hauv huab cua txias, thermal rwb thaiv tsev ntawm lub thawv yuav tsum, uas yuav siv tau raws li fiberglass, ntxhia ntaub plaub los yog tej khoom (xuab zeb, nthuav av nplaum). Nyob rau tib theem, fixtures los yog cov qauv yog xav txog kom yooj yim tuav ntawm lub workpiece thiab haumxeeb pab kiag li lawm uas yuav siv tau nyob rau hauv txawv theem ntawm lub lag luam.
Qhov chaw ntawm hluav taws xob
Thaum ua metallization hauv tsev, cov khoom siv hluav taws xob xav tau uas yuav tsum tau txuas nrog lub chaw ua haujlwm los muab cov tshuaj tiv thaiv electrochemical. Ib tug tsis zoo cathode yuav tsum tau txuas nrog cov khoom, thiab ib tug zoo anode yuav tsum tau txuas nrog rau cov tshuaj. Cov duab ntawm cov electrodes raug xaiv raws li kev yooj yim; ob qho tib si pas nrig thiab phaj phaj tuaj yeem siv tau. Tab sis yuav ua li cas chrome hlau thiaj li thoob plawskev ua haujlwm tsis qhib kev sib cuag? Rau ib lub voj voog nrog cov khoom siv tam sim no rau ib feem, yuav tsum tau muab ib qho hlua khi. Nws ruaj ntseg tuav lub workpiece nyob rau hauv txoj hauj lwm xav tau. Yog tias koj npaj yuav ua cov txheej txheem compact, lub teeb yuag, qhov gripper no tseem yuav hloov cov cuab yeej tuav nws hauv cov tshuaj. Ib qho rheostat zoo tib yam tuaj yeem ua ncaj qha raws li qhov tam sim no nrog qhov muaj zog txaus. Rau cov khoom me me, cov xaim mus txog 2.5 mm2 yuav txaus.
Electrolyte Solutions
Cov neeg tsav tsheb ib txwm siv rau cov txheej txheem no siv cov txheej txheem yooj yim raws li chromic anhydride (250 g / l) thiab sulfuric acid (txog 3 g / l). Nws yog ib qho tseem ceeb kom nco ntsoov tias cov khoom tseem ceeb ntawm hexavalent chromium yog cov saum toj no anhydride, thiab trivalent - chromium chloride los yog sulfate. Lub tswv yim thib ob yog siv tsawg dua, vim hais tias xws li ib tug muaj pes tsawg leeg muaj ib tug tseem ceeb cuam tshuam rau lub textural thiab textural zog ntawm ib feem. Raws li kev tswj hwm qhov kub thiab txias, cov hlau zoo chrome-plated tuaj yeem tau txais ntawm 45-60 ° C, tab sis qhov no tuaj yeem nthuav dav nyob ntawm cov tshuab xaiv. Tam sim no peb tuaj yeem saib ze dua ntawm cov txheej txheem rau kev ua haujlwm.
Electrochemical technology
Txoj kev siv ntau tshaj plaws uas tau siv dav hauv tsev neeg. Cov lus qhia rau nws siv zoo li no:
- Lub thawv npaj tau ntim dej li ntawm 60-70%. Tseem ceebNco ntsoov tias cov kua yuav tsum tau lim ua ntej - nws yog qhov zoo tshaj plaws los siv cov dej distilled.
- Lub thawv sov kom txog thaum qhov kub ntawm cov khoom nce mus txog kwv yees li 60 ° C.
- Qhov ntim ntawm chromic anhydride yog nchuav. Nws yuav tsum tau tov nrog dej.
- Nyob rau theem no, koj yuav ntsib teeb meem ntawm qhov tsis muaj dej txaus. Yuav ua li cas chrome hlau nyob hauv tsev, yog tias tsim nyog los kho cov proportions ntawm cov tshuaj? Nws raug nquahu kom tsis txhob muaj qhov no, tab sis nyob rau hauv txhua rooj plaub, nws raug nquahu kom hloov kho nyob rau hauv cov kev taw qhia ntawm kev nce qhov ntim ntawm cov dej kom sau cov qib tank xav tau.
- Sulfuric acid yog ntxiv rau qhov yog.
- Tom qab nplawm cov tshuaj dua, nws yuav tsum tau tso cai rau kev sib haum xeeb rau 3-4 teev thaum tam sim no thov ntawm tus nqi ntawm 6.5 A ib 1 liter. Raws li cov tshuaj tiv thaiv tshwm sim, cov electrolyte yuav maj mam tau cov xim av xim av.
- Lub zog hluav taws xob tau muab tua, tom qab ntawd lub peev xwm yog infused rau lwm hnub.
Muaj peev xwm sib yuav thaum ua chrome plating
Yog tias qhov kev ua haujlwm tau ua thawj zaug, ces muaj kev pheej hmoo loj ntawm kev tau txais ntau yam tsis xws luag. Yuav ua li cas chrome hlau hauv tsev kom tshem tawm qhov muaj peev xwm? Ua li no, koj yuav tsum paub cov laj thawj tshwj xeeb rau kev sib yuav:
- Muaj qhov me me ntawm qhov chaw - kev kho mob tsis txaus tau ua rau ntawm ntu.
- Npog tev tawm - qhov chaw tam sim no tau muab nrog qhov ntsuas hluav taws xob.
- Cov txheej chrome yog softened - ib yam nkausqhov kub thiab txias tam sim no.
- Tsis muaj tus yam ntxwv ci ntsa iab ntawm qhov chaw - pov thawj ntawm lub zog tam sim no overestimated lossis ntau dhau ntawm chromium tivthaiv hauv cov tshuaj.
- Ci tsis sib luag ntawm qhov chaw - tsis muaj qhov kub thiab txias lossis qhia tias lub mortar tsis tau tov zoo.
- Brown me ntsis - ib qho me me ntawm cov kua qaub tiv thaiv keeb kwm yav dhau los ntawm chromium ntau dhau.
Lwm yam chrome technologies
Lwm txoj kev siv chromium yog diffuse. Tab sis nws yog siv lub hom phiaj rau kev hloov kho saum npoo vim qhov sib xyaw ua ke ntawm silicon, carbon, aluminium thiab nitrogen ntawm qhov kub thiab txias. Yuav ua li cas chrome hlau hauv tsev siv txoj kev diffusion? Cov thev naus laus zis muab kev ntub dej rau hauv hydrochloric acid, tom qab ntawd tso tawm nrog cov hmoov sib tov, ua raws li cov pa roj. Ib tug subtype ntawm txoj kev no yog condensation kho nrog chromium chloride vapor, tab sis nws yog feem ntau ua nyob rau hauv technologically sophisticated khoom. Kuj tsim nyog sau cia yog ib txoj kev hu ua "silver mirror". Nws essence yog nyob rau hauv deposition ntawm silver ntsev nyob rau hauv ib tug alkaline tov. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tsum siv cov kev pabcuam pabcuam uas muaj hydrazine thiab rov qab qab zib. Txhawm rau muab cov xim xim ntawm qhov kawg ntawm kev ua tiav, cov xim tshwj xeeb thiab cov kua roj vanish tuaj yeem siv.
Yuav ua li cas rov qab chrome ntawm hlau?
Technically, cov qauv ntawm cov txheej no tuaj yeem rov qab los ntawm kev decapitation nkaus xwb. Nws muaj nyob rau hauv re-immersing ib feem nyob rau hauvtov nrog sulfuric thiab hydrochloric acids nyob rau hauv yuav tsum tau concentration, uas nyob ntawm seb qhov luaj li cas ntawm ib feem thiab tam sim no lub xeev ntawm cov chromium txheej. Tom qab cov txheej txheem no, lub workpiece yog ntxuav nrog dej sov thiab infused rau ob peb teev nyob rau hauv ib qho chaw qhuav. Txoj kev pheej yig dua los kho cov txheej txheem chrome ntawm cov hlau koom nrog kev siv cov pastes tshwj xeeb uas tsim los ntawm cov tuam txhab tshuaj pib. Cov khoom zoo li no tau raug rubbed rau hauv cov txheej txheem microfiber txheej, tsim cov yeeb yaj kiab tiv thaiv thiab sau cov pores me me. Cov txheej txheem sib tsoo kuj tseem pab kho qhov tsis zoo ntawm chrome nto, tab sis lawv cov nyhuv tshem tawm cov txheej thaum lub sijhawm. Vim li no, nws raug nquahu kom siv cov cuab yeej tiv thaiv ntxiv raws li kev tiv thaiv. Ntawm lawv yog cov zaub mov yooj yim tshaj plaws raws li crushed chalk thiab ammonia. Txawm li cas los xij, cov ntaub ntawv no yuav tsum tsuas yog rubbed nrog daim txhuam cev mos thiab cov ntaub so ntswg.
Lwm cov ntaub ntawv puas tuaj yeem ua chrome plated?
Txoj kev xav, txhua yam khoom siv nrog cov qauv ntxeem tau ntawm qhov chaw tuaj yeem raug electrochemical metallization, uas yuav ua kom muaj adhesion txaus. Tsis zoo li cov hlau, yas thiab ceramics yog chromium-plated nyob rau hauv tsawg aggressive kub tej yam kev mob. Qhov nuance no siv tau rau txhua yam khoom uas muaj kev cuam tshuam rau qhov kub thiab txias. Txwv tsis pub, cov xwm txheej zoo ib yam - ob qho tib si ntawm kev npaj cov txheej txheem thiab hais txog kev npaj cov tshuaj electrolytic.
Zaj lus
Qhov tshwm sim ntawm chrome plating yog qhov sib npaug thiabCov nyhuv zoo nkauj, thiab tsim cov txheej txheem tiv thaiv. Hauv thawj qhov xwm txheej, koj tuaj yeem suav rau qhov tau txais lub ntsej muag zoo nkauj, uas tau hais los saum toj no, thiab hauv qhov thib ob, ntawm kev ncua lub neej ua haujlwm ntawm ib feem. Txawm tias hlau chrome-plated nyob rau hauv tsev ntxiv hnav tsis kam, lub zog thiab hardness zog. Rau cov hardening ntxiv ntawm qhov tseem ceeb, kev kho cua sov tshwj xeeb ntawm cov txheej yog qee zaum siv nrog tuav ntawm qhov kub txog li 200 ° C. Ntawm qhov tod tes, chromium plating kuj muaj cov ntsiab lus tsis muaj zog. Sij hawm dhau mus, cov txheej txheej hnav tawm txawm tias nyob rau hauv cov xwm txheej ntawm kev ntxhov siab me me, uas yog vim li cas cov kws tshaj lij pom zoo kom saib xyuas nws cov kev tiv thaiv los ntawm kev pib ua haujlwm ntawm qhov hloov kho tshiab. Raws li rau txoj kev ua nws tus kheej, rau tag nrho nws muaj nyob rau hauv tsev siv, nws kuj muaj ib tug loj rho tawm. Nws yog qhia nyob rau hauv toxicity ntawm cov electrolytes siv, uas yuav tsum tau ua raws li cov kev cai tsim nyog kev nyab xeeb.
