Copper anode passivation ntawm hluav taws xob cua sov raj
Tso lus
Copper anode passivation ntawm hluav taws xob cua sov raj
Monovalent tooj liab muaj nyob
Lub xub ntiag ntawm monovalent tooj liab nyob rau hauv acidic ci tooj liab plating tov yuav ua rau lub txheej tsis ci. Vim hais tias thaum lub sij hawm electrodeposition, monovalent tooj liab ib txwm precipitates ua ntej tshaj divalent tooj liab, nws yog ib qho yooj yim ua rau roughness thiab burrs nyob rau hauv lub txheej, tshwj xeeb tshaj yog nyob rau hauv tsawg tam sim no ceev qhov chaw uas lub plating tsis kaj thiab leveling muaj peev xwm tsis zoo. Tsis tas li ntawd, yog tias muaj ntau dhau ntawm Cl - hauv cov tshuaj plating, tooj liab monovalent thiab Cl - tseem yuav tsim cov tshuaj chloride precipitates, ua rau cov tshuaj plating turbid thiab deteriorating qhov zoo ntawm txheej. Monovalent tooj liab yog tsim los ntawm kev qhia txog qee cov tshuaj txo qis, thiab qee zaum tooj liab anode passivation kuj ua rau cov tooj liab monovalent. Txhawm rau tshem tawm cov kev cuam tshuam ntawm monovalent tooj liab, H2O2 tuaj yeem diluted nrog ib feem ntawm 0.25mL / L ua ntej txhua qhov ua haujlwm thiab ntxiv rau cov tshuaj plating; Qee lub sij hawm qhov tsim nyog ntawm sulfuric acid tuaj yeem ntxiv raws li kev sib cais anodic, uas tuaj yeem tshem tawm cov cawv ntawm monovalent tooj liab. Nws yog qhov zoo tshaj plaws los siv txoj kev ua kom pom kev tsis tu ncua los ua kom lub plating tov tshuaj ntxuav thiab tswj kom zoo thiab ci txheej.
Tooj liab anode passivation
Lub xub ntiag ntawm anode tooj liab hmoov thiab monovalent tooj liab feem ntau yog vim qhov siab tam sim no ntawm cov anode siv los yog cov ntsiab lus phosphorus tsis haum ntawm tooj liab anode, uas ua rau passivation ntawm anode thiab tsis muaj brightness ntawm txheej. Qhov loj feem ntawm phosphorus nyob rau hauv acidic ci tooj liab plating anodes yuav tsum nyob rau hauv thaj tsam ntawm {{0}}.02 feem pua ~ 0.07 feem pua . Thaum lub sij hawm electrolysis, nws yog qhov zoo rau qhov anode nto yuav tsum tau them los ntawm ib tug mos mos zaj duab xis los txo cov tiam ntawm anode sludge thiab tsis txhob sib cuag ncaj qha ntawm lub plating tov thiab anode hlau nto. Qhov no tsis tsuas yog tiv thaiv kev tsim ntawm pitting ntawm txheej, tab sis kuj zam lub adsorption thiab oxidation decomposition ntawm brightener ntawm cov av nkos anode. Yog hais tias qhov loj feem ntawm phosphorus nyob rau hauv lub anode yog tsawg tshaj li 0.02 feem pua, cov dub zaj duab xis tsim nyob rau hauv electrolysis yog ib qho nyuaj rau tiv thaiv zus tau tej cov tooj liab monovalent, uas ua rau ib tug nce nyob rau hauv tooj liab hmoov nyob rau hauv lub plating tov. Yog tias qhov loj ntawm phosphorus ntau tshaj 0.1 feem pua, nws yuav cuam tshuam rau kev tawg ntawm anode, ua rau anode passivation, txo cov concentration ntawm divalent tooj liab nyob rau hauv lub plating tov, thiab tsim ib tug loj npaum li cas ntawm anode av nkos, cuam tshuam lub brightness ntawm lub teeb. txheej. Yog li ntawd, nws yog qhov zoo tshaj plaws los siv txhuam polypropylene ntaub ua lub hnab anode los tiv thaiv cov av nkos anode los ntawm kev sib kis cov tshuaj plating.
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