Cov yam tseem ceeb cuam tshuam rau qhov tsis ruaj khov ntawm cov tshuaj plating
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Cov yam tseem ceeb cuam tshuam rau qhov tsis ruaj khov ntawm cov tshuaj plating
Tshuaj nickel plating tshuab yog ib txoj hauv kev kom tau txais cov txheej txheem los ntawm kev siv cov ntsev ntsev thiab txo cov neeg ua haujlwm kom ua rau nws tus kheej catalytic tshwm sim ntawm cov khoom siv. Txog tam sim no, electroless npib tsib xee plating yog ib qho ntawm cov txheej txheem kho mob sai sai rau txawv teb chaws, thiab nws daim ntawv thov ntau kuj yog dav. Txoj kev loj hlob sai ntawm electroless nickel plating yog txiav txim siab los ntawm nws cov txheej txheem zoo tshaj plaws.
1. Kev sib piv tsis raug ntawm cov tshuaj plating
① Yog hais tias qhov concentration ntawm phosphite (txo tus neeg sawv cev) siab dhau lawm, ua kom cov concentration ntawm phosphite nyob rau hauv cov tshuaj plating yuav txhim kho tus nqi deposition. Txawm li cas los xij, thaum tus nqi deposition nce mus txog, txuas ntxiv mus ntxiv cov concentration ntawm phosphite tsis tsuas yog cuam tshuam tus nqi deposition, tab sis kuj ua rau cov plating tov rau nws tus kheej decompose.
② Yog tias qhov concentration ntawm npib tsib xee ntsev ntau dhau, nws tuaj yeem ua kom cov ntsev nickel nce ntxiv. Thaum pH tus nqi ntawm cov tshuaj plating siab dhau lawm, nws yog ib qho yooj yim los tsim cov nickel phosphite thiab npib tsib xee hydroxide precipitates, uas tuaj yeem ua rau cov tshuaj plating turbid, yooj yim ua rau nws tus kheej decomposition ntawm cov tshuaj plating, thiab ua rau muaj ntau yam particles ntawm qhov chaw. lub workpiece.
③ Ib qho ntawm cov haujlwm tseem ceeb ntawm chelating tus neeg sawv cev yog kom cov nag los nag ntawm cov plating ntawm cov plating tov thaum cov concentration ntawm chelating cov neeg sawv cev qis dhau. Plating tov ntawm npib tsib xee ntsev concentration, kub Thaum tus nqi pH yog tas li, solubility thiab nag lossis daus taw tes ntawm npib tsib xee phosphite nyob rau hauv lub plating tov kuj tas li. Yog hais tias cov concentration ntawm cov complexing tus neeg sawv cev nyob rau hauv cov kev daws yog tsawg dhau lawm, raws li cov tshuaj nickel plating tshwm sim, tus nqi ntawm phosphite yuav nce mus ntxiv thiab sai sai mus txog rau nag lossis daus point ntawm npib tsib xee phosphite, ua rau nag lossis daus. Cov precipitates no yuav yog ib qho ntawm cov neeg ua haujlwm rau kev sib cais ntawm tus kheej ntawm cov tshuaj plating, thiab kuj yog ib qho ntawm cov laj thawj rau ntau cov granular hais nyob rau saum npoo ntawm lub workpiece.
④ Yog hais tias qhov concentration ntawm pH hloov tus neeg sawv cev siab dhau lawm, nyob rau hauv cov xwm txheej uas lwm yam khoom ntawm cov tshuaj plating tseem tsis hloov, yog tias tus nqi pH hloov siab dhau lawm, nws kuj tseem yooj yim ua rau nag lossis daus ntawm nickel phosphite thiab nickel hydroxide, thiab leeb lub decomposition ntawm txo tus neeg sawv cev, uas kuj yog ib qho ntawm cov laj thawj rau ntau granular hais nyob rau saum npoo ntawm lub workpiece.
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