Misting, greying, los yog blackening ntawm electroplated txheej ntawm hluav taws xob cua sov raj

Misting, greying, los yog blackening ntawm electroplated txheej ntawm hluav taws xob cua sov raj

Qhov kev txhaum no feem ntau tshwm sim nyob rau hauv qhov chaw qis tam sim no, nrog ntau yam ua rau nws thiab qhov tshwm sim ntau dua.

(1) Siab lossis qis concentration ntawm cov ntsev tseem ceeb tuaj yeem tshwm sim tau yooj yim. Siab dhau heev lawm, ceev deposition npaum li cas, zoo txheej brightness, tsis scorching nyob rau hauv high tam sim no ceev qhov chaw, tab sis fogging, greying los yog blackening nyob rau hauv tsawg tam sim no ceev; Yog tias nws tsawg dhau, qhov tso nyiaj tso tawm thiab qhov ci yuav txo qis. Muaj peev xwm txheeb xyuas cov kev daws teeb meem rau kev hloov kho, lossis ua kev kuaj Hull cell. Tsis txhob dig muag ntxiv cov ntsev tseem ceeb, vim tias kev tsis saib xyuas me ntsis yuav ua rau nws nyuaj rau tshem tawm qhov tsis raug.

(2) Lub concentration ntawm conductive ntsev yog tsawg, thiab cov txheej nyob rau hauv qhov tsawg tam sim no ceev cheeb tsam muaj high voltage thiab tsawg tam sim no qhib, tshwj tsis yog rau fogging, greying, thiab blackening; Tam sim no me ntsis siab dua, txheej txheej hauv qhov chaw siab tam sim no yog hlawv, thiab qhov ci ntsa iab qis dua. Ob qho kev ntsuas kev hloov kho thiab kev kuaj Hull cell tuaj yeem txiav tawm.

(3) Thaum cov concentration ntawm lub tog raj kheej qhib tus neeg sawv cev yog tsawg, lub peev xwm dispersion thiab sib sib zog nqus plating muaj peev xwm txo, thiab cov txheej nyob rau hauv qhov chaw uas tsis muaj tam sim no ceev yuav pos huab, grey, thiab dub. Kev txiav txim siab raug raug tshem tawm los ntawm kev ntxiv cov tshuaj uas tsim nyog, tab sis tsis txhob ntxiv ntau dhau.

(4) Muaj ntau cov hlau txawv teb chaws thiab cov organic impurities hauv cov tshuaj plating. Yog tias nws yog impurities xws li tooj liab thiab txhuas, cov khoom siv ntxiv muaj cov haujlwm zais thiab tsis tas yuav kho. Feem ntau, nws yog tshwm sim los ntawm ntau decomposition khoom ntawm additives. Nyob rau lub sijhawm no, cov tshuaj yuav ua rau huab cua me ntsis thiab yuav tsum tau ntxiv cov pa roj carbon activated rau kev pom thiab tshem tawm.

1.4 Rough txheej

(1) Muaj ntau yam khoom tsis huv hauv cov tshuaj, feem ntau yog los ntawm cov tshuaj insoluble uas tsim los ntawm anodic dissolution. Cov organic decomposition khoom ntawm additives yog zoo tshaj plaws kho thiab lim nrog activated carbon.

(2) Fe3 ntxiv rau hauv cov tshuaj plating, uas yog tsim los ntawm oxidation ntawm lub ntsiab ntsev Fe2 ntxiv. Hauv cov tshuaj tiv thaiv oxidation, H ntxiv rau hauv cov tshuaj txo qis vim noj, thiab pH tus nqi nce. Fe3 ntxiv tsim cov khoom tsis sib haum hydroxide los ntawm lub xeev colloidal, thiab adsorbs ntawm txheej, ua rau roughness. Fe3 ntxiv muaj ntau, thiab cov tshuaj yog turbid, qhia ib tug me ntsis brownish xim daj. Hauv qhov xwm txheej hnyav, nws zoo li cib liab. Ntawm no, ntxiv 0.5-1.0gL ntawm tus neeg sawv cev txo kom txo Fe3 ntxiv rau Fe2 ntxiv, rov qab kho cov tshuaj kom meej, thiab tshem tawm qhov ua tsis tiav.

(3) Cov ntsiab lus ntawm additives (carrier brightener) tsawg dhau. Ntxiv lub tog raj kheej qhib tus neeg sawv cev rau lub tank tshiab ntawm tus nqi ntawm 12.

(4) Qhov kev ncua deb ntawm lub anode tooj liab pas nrig thiab cathode tooj liab pas nrig yog ze heev, ua rau qhov deb ntawm tsawg tshaj li 150 hli ntawm zinc phaj (anode) thiab cov cuab yeej dai (cathode). Hloov cov qauv dai fixture kom haum.

(5) Yog hais tias cov ntsiab lus ntawm zinc chloride nyob rau hauv lub ntsiab ntsev yog siab dhau lawm, cov tshuaj yuav diluted kom tsim nyog, thiab conductive ntsev thiab brightener yuav muab ntxiv raws li.

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