Chrome plating yog txheej txheem uas txheej txheej nyias txheej ntawm chromium tau thov rau cov hlau saum npoo los ntawm kev ua hluav taws xob (feem ntau yog saum txheej txheej npib tsib xee). Qhov ua tau zoo tshaj plaws ci ntsa iab yog ua kom zoo nkauj, xeb thiab ua kom tsis zoo, thiab ruaj khov. Txawm li cas los xij, chrome plating raug tshem tawm tas li rau ntau yam. Piv txwv li, txawm hais tias ua tau zoo ntawm chrome plating, nws tuaj yeem raug puas los ntawm kev hnav thiab tsim kua muag thiab dhau los ua qhov tsis zoo, xav tau kev tshem tawm. Muaj ntau yam kev xaiv muaj rau tshem tawm chrome, qee qhov uas siv cov khoom siv niaj hnub thiab lwm yam uas siv tshuaj lom tshuaj lom ntau - qhov twg los xij uas koj xaiv, siv txhua qhov kev ceeb toom tsim nyog thiab ua raws cov txheej txheem kev nyab xeeb.
Cov kauj ruam
Txoj Kev 1 ntawm 3: Tshem Chrome nrog Cov Tshuab Tshwj Xeeb
Kauj Ruam 1. Siv lub tshuab ntxhua khaub ncaws
Kev txhuam hniav (piv txwv li, xuab zeb blasting, hlaws blasting, thiab lwm yam) yog txheej txheem uas cov ntaub ntawv tau tawg nrog cov tshuaj tsuag hmoov zoo lossis cov hmoov me me. Feem ntau, cov khw muag khoom lub cev thiab cov tuam txhab tsim khoom yuav nkag tau rau cov khoom siv zoo li no. Kev txhuam hniav ntev tuaj yeem tshem tawm ib qho khoom chrome tiav, txawm hais tias kov-ua haujlwm yuav xav tau ua tiav ntawm cov khoom nyuaj rau mus txog qhov chaw tom qab lo lus.
- Koj yuav xav siv qhov nruab nrab zoo nkauj (piv txwv li, 400-zeb zeb) thaum tawg koj lub chrome los tiv thaiv kev puas tsuaj rau cov hlau hauv qab.
- Nco tseg tias cov plua plav plua plav thiab cov hmoov av uas tsim los ntawm chipping me me ntawm chrome thaum siv lub tshuab ntxhua khaub ncaws tuaj yeem ua rau muaj tshuaj lom, yog li siv lub ntsej muag/qhov ncauj tiv thaiv kom tsim nyog.
Kauj Ruam 2. Siv lub tshuab nqus tsev ultrasonic
Cov tshuaj ntxuav ultrasonic yog cov cuab yeej tshwj xeeb uas siv lub suab tsis zoo los ntxuav cov khoom me, nyuaj-rau-ntxuav cov khoom zoo li cov hniav nyiaj hniav kub. Cov tshuaj ntxuav ultrasonic tuaj yeem tshem tawm chrome hauv qee qhov xwm txheej (tshwj xeeb tshaj yog thaum chrome twb tau xoob nrog lwm txoj hauv kev). Muab cov khoom chrome tso rau hauv lub pob tawb ultrasonic ntxuav thiab tso lawv rau hauv cov tshuaj ntxuav (feem ntau yog cov dej zoo tib yam), tom qab ntawd tso cai rau lub tshuab ntxhua khaub ncaws kom ua raws li nws cov lus qhia.
- Siv cov kuab tshuaj uas tuaj yeem yaj chrome (piv txwv li, tshuaj dawb, raws li tau sau tseg saum toj no) ntau dua li dej tuaj yeem txhim kho chrome-tshem lub zog ntawm lub tshuab nqus tsev ultrasonic. Txawm li cas los xij, tsuas yog ua li ntawd yog tias qhov kev daws teeb meem koj siv yuav tsis ua rau cov tshuaj ntxhua lossis lwm yam cuam tshuam nrog nws hauv txhua txoj kev. Piv txwv li, raws li tau sau tseg hauv qab no, lye yuav hnov mob nrog cov thawv txhuas.
- Nco ntsoov tias, thaum lub tshuab ultrasound tuaj txog ntau qhov ntau thiab tsawg, feem ntau tsuas yog tuav cov khoom me me, xws li cov hniav nyiaj hniav kub, cov pob ntsaws, cov cuab yeej, cov khoom zoo nkauj, thiab lwm yam.
Txoj Kev 2 ntawm 3: Tshem Chrome nrog Tshuaj Daws Teeb Meem
Kauj Ruam 1. Siv hydrochloric acid (muriatic acid)
Hydrochloric, los yog muriatic, acid, yog ib qho muaj zog, muaj kua qaub. Hauv siab ntau, nws tuaj yeem siv los tshem tawm chrome plating los ntawm cov khoom hlau. Txhawm rau tshem tawm chrome, cov kua qaub ntawm kwv yees li 30-40% kev mloog zoo yuav tsum txaus. Ua raws li hauv qab no:
- Sib tov 1/3 ib feem hydrochloric acid rau 1 feem dej hauv lub vat siv rau kev sib xyaw tshuaj (zoo li lub thoob yas hnyav, thiab lwm yam) los tsim 30% kua kua. Xwb, yuav cov tshuaj ua ntej sib xyaw ua kua ntawm qhov txaus.
- Submerge cov khoom chrome-plated hauv kev daws kom txog thaum chrome strips tawm.
- Ntxuav cov khoom kom huv nrog xab npum thiab dej, thiab yaug ua ntej kom qhuav.
Kauj Ruam 2. Siv sodium hydroxide (lye) los txua chrome los ntawm cov hlau tsis muaj hlau thiab cov hlau carbon
Sodium hydroxide, feem ntau hu ua lye, yog cov tshuaj tsw qab, cov tshuaj yooj yim heev. Nws tuaj yeem yaj ntau hom hlau plating, suav nrog chrome, tab sis ua rau muaj kev phom sij txaus ntshai nrog dej thiab txhuas, ua rau txhuas txhim kho nws tus kheej thiab ua rau cov pa hydrogen tawg taus. Yog li, nws yuav tsum tsuas yog siv ntawm cov khoom uas tsis siv txhuas ua cov khoom siv hauv paus. Ua raws li hauv qab no:
- Sib tov 8 txog 12 fl ooj (kwv yees li 227 ml txog 355 ml) ntawm sodium hydroxide nrog 1 nkas loos (3.785 L) dej hauv lub vat ua los ntawm cov khoom nruab nrab (zoo li lub thoob yas hnyav).
- Tsau cov khoom chrome-plated hauv kev daws kom txog thaum chrome tawm. Qhov no yuav siv sijhawm ntev heev, yog li nquag tshuaj xyuas koj cov khoom kev nce qib.
- Ntxuav cov khoom kom huv nrog xab npum thiab dej, thiab yaug ua ntej kom qhuav.
Kauj Ruam 3. Ua qhov thim rov qab electroplating
Chrome tau txuas nrog cov hlau los ntawm cov txheej txheem ntawm electroplating, nyob rau hauv uas hluav taws xob tam sim no tau siv los khi chrome rau cov hlau ntawm qib qib molecular. Los ntawm kev thim rov qab cov txheej txheem no, chrome plating tuaj yeem tshem tawm tau zoo heev. Txawm li cas los xij, ua li ntawd tuaj yeem ua rau txaus ntshai heev. Tsis yog tsuas yog cov txheej txheem cuam tshuam nrog hluav taws xob nyob tam sim no, tab sis kuj tsim ntau yam tshuaj lom, tshuaj lom carcinogenic raws li cov khoom lag luam ntawm cov tshuaj tiv thaiv. Hexavalent chromium, piv txwv li, yog ib qho heev khoom txaus ntshai. Yog li, cov txheej txheem no yog qhov zoo tshaj rau cov kws tshaj lij - cov hauv qab no yog rau cov ntaub ntawv xov xwm nkaus xwb.
- Sib tov chromic acid thiab sulfuric acid hauv dej hauv qhov kwv yees li 100: 1 piv. Piv txwv li, koj tuaj yeem ntxiv 33 oz. (936 grams) ntawm chromic acid muaju thiab.33 oz. (9.36 milliliter) ntawm cov kua sulfuric acid mus rau cov dej ua kua kom ua 1 nkas loos (3.79 litres). Sib tov daws hauv lub tank tso dej kom zoo siv rau electroplating, ntsuas cov khoom, thiab/lossis tshuaj kho mob.
- Kub cov tshuaj. Khaws qhov kub ntawm qhov kev daws teeb meem los ntawm 95 txog 115 degrees Fahrenheit (35 txog 46 degrees Celsius) rau kho kom zoo nkauj chrome. Khaws qhov kub ntawm 120 txog 150 degrees Fahrenheit (49 txog 66 degrees Celsius) rau tawv chrome.
- Khiav tus nqi tsis zoo los ntawm DC lub zog los ntawm kev sib xyaw chromic plating los ntawm xaim.
- Txuas cov cathode zoo rau cov khoom uas tau npaj rau hle thiab muab cov khoom tso rau hauv qhov kev daws teeb meem. Qhov zoo them sab nrauv chrome hlau yuav raug rub los ntawm qhov khoom.
- Yaug cov khoom hauv dej kub npau npau, tom qab ntawd yaug dua. Muaj cov khoom pov tseg ua haujlwm zoo thiab muab pov tseg.
Txoj Kev 3 ntawm 3: Tshem Tawm Fake lossis Teeb Chrome nrog Cov Khoom Siv Hauv Tsev
Kauj Ruam 1. Siv cov tshuaj txhuam hauv tsev los tshem tawm tshwj xeeb los yog chrome tsis muaj zog
Ib qho ntawm qhov yooj yim tshaj plaws, txoj hauv kev yooj yim tshaj plaws los tshem tawm chrome yog los ntawm kev siv tshuab yooj yim - piv txwv li, txhuam nrog txhuam. Sib tov cov dej qab zib lossis dej huv hauv tsev nrog dej kom ua cov tshuaj txhuam hniav uas tuaj yeem rub mus rau chrome nrog cov ntaub mos muag kom txog rau thaum chrome pib muab txoj hauv kev. Txoj hauv kev no tuaj yeem ua haujlwm zoo tshaj plaws nrog tshwj xeeb yog nyias, tsis muaj zog chrome plating lossis nrog "fake" chrome plating (piv txwv li, yas pleev xim nrog cov khoom "chrome" cuav). Txawm hais tias nyob hauv cov xwm txheej no, yuav tsum muaj lub luj tshib roj.
Txheeb xyuas koj qhov kev nce qib ntau zaus thaum koj txhuam. Kev txhuam kom ntev heev tuaj yeem khawb cov khoom siv
Kauj Ruam 2. Siv lub tshuab nqus tsev ntxhua khaub ncaws
Qee hom chrome (tshwj xeeb yog cov yas sib txawv hloov pauv zoo li koj tuaj yeem pom ntawm cov qauv tsheb, thiab lwm yam) tuaj yeem raug tshem tawm nrog cov lag luam-qib cov tshuab ntxuav tais diav. Cov kev daws teeb meem de-greasing feem ntau tuaj hauv aerosol tuaj yeem ua npuas dej lossis tshuaj tsuag. Muab koj lub chrome ib feem ua kom zoo dua qub, tom qab ntawd cia nws zaum li 10 feeb. So lub chrome tawm nrog rau lub tshuab ntxhua khaub ncaws.
Nco ntsoov tias qee lub qhov cub tsuag tshuaj txau tshuaj tuaj yeem ua rau cov hlau tsis zoo yog tias sab laug los zaum ntev dhau, yog li koj yuav xav siv cov txheej txheem rov ua ntu zus ntxiv kom txog thaum koj muaj qhov txiaj ntsig koj xav tau
Kauj Ruam 3. Tsau cov khoom uas muaj chromed hauv tsev tshuaj dawb
Lwm txoj hauv kev nyiam ntawm tus qauv tsheb nyiam rau tshem chrome yog siv cov tshuaj ntxhua khaub ncaws. Hauv txoj hauv kev no, cov khoom siv chromed tsuas yog tso rau hauv cov tshuaj dawb thiab sab laug los zaum. Tom qab txog ib hnub, nyob ntawm nws cov tuab, cov chrome yuav tsum tau xoob yog tias tsis hle hlo li.
- Qhov txiaj ntsig tseem ceeb ntawm txoj kev no piv rau lwm tus yog tias cov tshuaj dawb yuav tsum tawm ib qho primer hauv qab txheej txheej chrome kom zoo.
- Tom qab siv tshuaj dawb los tshem tawm chrome, nws yuav tsum tau muab pov tseg kom zoo thiab tsis txhob rov siv dua (rau khaub ncaws, thiab lwm yam)
Kauj Ruam 4. Siv cov dej nres kom tshem tawm cov plating chrome
Cov txheej txheem tsheb nres ua haujlwm zoo li xim thim kom tshem cov txheej chrome los ntawm cov khoom yas. Txawm li cas los xij, txoj kev no tuaj yeem siv sijhawm ob peb hnub los ua haujlwm. Tsis tas li ntawd, nws xav tau kev tuav kom raug thiab pov tseg cov dej nres, uas yog tshuaj lom. Rub cov khoom chrome nrog cov kua dej tso thiab tso nws tseg li 10 feeb ua ntej yaug nws tawm. Rov ua dua raws li xav tau kom tshem tawm tag nrho chrome.
Nco ntsoov tias cov kua dej tuaj yeem yaj cov yas, yog li ceev faj heev thaum siv txoj hauv kev no ntawm cov yas yas (lossis xaiv lwm txoj hauv kev)
Lub tswv yim
Paub koj tus kheej nrog qhov xwm txheej ntawm cov substrata lossis hlau uas tau ua chromed, yog li koj zam kev puas tsuaj rau cov hlau ntawd
Lus ceeb toom
- Siv cov khoom siv hauv tsev tsis yog tsis muaj kev phom sij rau lub qhov muag, tawv nqaij, thiab ua pa; nco ntsoov hnav cov cuab yeej nyab xeeb thiab muaj kev pab thawj zaug/phiaj xwm xwm txheej ceev ntawm tes.
- Hydrochloric acid, sodium hydrochloride, thiab sulfuric acid yog qhov tshwj xeeb tshaj yog hloov pauv, muaj tshuaj lom, thiab txawm tias ua rau mob qog noj ntshav; txo kev pheej hmoo los ntawm kev hnav cov cuab yeej muaj kev nyab xeeb thiab muaj kev pab ua ntej/phiaj xwm xwm txheej ceev ntawm tes.
