Dab tsi yog yam uas ua rau acidic ci tooj liab txheej ntawm hluav taws xob cua sov raj tsis ci?
Tso lus
Dab tsi yog yam uas ua rau acidic ci tooj liab txheej ntawm hluav taws xob cua sov raj tsis ci?
1. Electrolyte impurity
Qhov zoo tib yam tooj liab sulfate thiab sulfuric acid siv nyob rau hauv lub tshiab plating tov yog impure, xws li muaj sulfuric acid nrog ib tug loj feem ntawm ntau tshaj los yog sib npaug rau 92.5 feem pua, uas muaj ntau ntawm hlau thiab organic impurities. Yog tias tsis kho, lub plating yuav tsis ci. Txawm hais tias reagent qib sulfuric acid, qhov xwm txheej no tuaj yeem tshwm sim yam tsis muaj kev kho mob, vim tooj liab sulfate kuj muaj impurities rau qee qhov. Ua ntej ntxiv sulfuric acid, 30 feem pua qhov loj ntawm H2O21 ~ 2mL / L thiab cov pa roj carbon activated 0.5 ~ 1.0g / L tuaj yeem muab ntxiv rau hauv cov tshuaj yaj tooj liab sulfate (pH nqi 4) rau kev kho mob sib koom ua ke. Tshem tawm cov hlau impurities los ntawm kev siv qhov yooj yim precipitated xwm ntawm trivalent hlau hydroxides; Ntxiv cov pa roj carbon activated adsorption tuaj yeem tshem tawm cov kev cuam tshuam ntawm cov organic impurities. Pib electroplating nyob rau hauv no txoj kev yuav ua rau ib tug kaj copper txheej. Cov hlau thiab cov organic impurities tsim los ntawm kev siv lub sij hawm ntev ntawm cov tshuaj plating yuav khaws ntau thiab ntau dua, qhia tias cov tshuaj plating tsis huv. Yog tias kev kho tsis tu ncua tsis ua raws li cov txheej txheem yuav tsum tau ua, qhov ua tau zoo tam sim no thiab txheej ci ntsa iab yuav txo qis thaum qhov loj ntawm cov hlau impurities ncav cuag 10g / L.
Piv txwv li, nyob rau hauv ib tug tej yam lub Hoobkas, tam sim no ntawm ib tug plating da dej yog tsis siab, lub txheej yog nyias thiab tsis kaj, thiab cov npoo thiab cov ces kaum ntawm plated qhov chaw yog nquag hlawv, uas ib zaug tiv thaiv ntau lawm. Ntawm qhov kev tawm tswv yim ntawm tus kws sau ntawv, kev ua piv txwv thiab kev tshuaj xyuas tau ua, tab sis vim muaj cov ntsiab lus siab ntawm cov hlau hauv cov tshuaj, uas cuam tshuam nrog kev tsom xam ntawm tooj liab sulfate thiab sulfuric acid kawg, cov ntaub ntawv tsis tuaj yeem tso tawm. Yog li ntawd, kev soj ntsuam ntawm cov hlau ions mus txog siab li 40g / L. Raws li kev soj ntsuam, cov xim ntawm cov tshuaj plating yog lub teeb. Tom qab paub tseeb tias qhov concentration ntawm txhua yam nyob rau hauv lub plating tov yog tsawg, ntxiv 40g / L tooj liab sulfate thiab 15g / L sulfuric acid kom txo tau qhov cuam tshuam ntawm hlau impurities; Tom qab ntawd, cov kev kho mob ib txwm tau ua los kho cov plating da dej kom zoo li qub thiab tsim cov txheej tooj liab tag nrho.
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