Ntawm PCB, npib tsib xee yog siv los ua cov txheej txheej substrate rau cov hlau muaj txiaj ntsig thiab cov hauv paus hlau. PCB low-stress nickel deposits feem ntau yog plated nrog hloov Watt nickel plating kev daws teeb meem thiab qee cov sulfamate nickel plating daws nrog cov khoom ntxiv uas txo cov kev ntxhov siab. Cia cov kws tshaj lij kev lag luam tshuaj xyuas rau koj tias cov teeb meem dab tsi ntawm PCB nickel plating daws feem ntau ntsib thaum siv nws?

1. txheej txheem nickel. Nrog rau qhov sib txawv ntawm qhov kub thiab txias, chav da dej kub siv kuj txawv. Nyob rau hauv cov nickel plating tov nrog kub siab, cov npib tsib xee plating txheej tau muaj kev ntxhov siab sab hauv thiab zoo ductility. Kev khiav hauj lwm kub yog tswj ntawm 55 ~ 60 degrees. Yog tias qhov kub thiab txias dhau lawm, nickel saline hydrolysis yuav tshwm sim, ua rau cov pinholes hauv txheej thiab tib lub sijhawm txo cov cathode polarization.

2. Tus nqi PH. Tus nqi PH ntawm npib tsib xee-plated electrolyte muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm txheej txheej thiab electrolyte kev ua tau zoo. Feem ntau, tus nqi pH ntawm npib tsib xee plating electrolyte ntawm PCB yog khaws cia ntawm 3 thiab 4. Nickel plating tov nrog ntau dua PH tus nqi muaj ntau dua dispersion quab yuam thiab cathode tam sim no efficiency. Tab sis PH yog siab dhau lawm, vim hais tias cov cathode tsis tu ncua hloov hydrogen thaum lub sij hawm electroplating txheej txheem, thaum nws siab tshaj 6, nws yuav ua rau pinholes nyob rau hauv lub plating txheej. Nickel plating tov nrog qis PH tau zoo dua anode dissolution thiab tuaj yeem ua kom cov ntsiab lus ntawm nickel ntsev hauv electrolyte. Txawm li cas los xij, yog tias pH qis dhau lawm, qhov ntsuas kub kom tau txais cov txheej plating ci yuav raug nqaim. Ntxiv npib tsib xee carbonate lossis npib tsib xee carbonate yooj yim ua kom tus nqi PH; ntxiv sulfamic acid los yog sulfuric acid txo tus nqi pH, thiab xyuas thiab kho tus nqi PH txhua plaub teev thaum ua haujlwm.

3. Anode. Cov pa nickel plating ntawm PCBs uas tuaj yeem pom tam sim no txhua tus siv cov anodes soluble, thiab nws yog qhov zoo heev uas siv cov pob tawb titanium ua anodes rau lub kaum sab xis nickel sab hauv. Lub pob tawb titanium yuav tsum tau muab tso rau hauv ib lub hnab anode woven ntawm cov khoom siv polypropylene los tiv thaiv cov av nkos anode los ntawm kev poob rau hauv cov tshuaj plating, thiab yuav tsum tau ntxuav tsis tu ncua thiab xyuas seb lub qhov muag puas du.

4. Kev huv huv. Thaum muaj cov organic paug hauv cov tshuaj plating, nws yuav tsum tau kho nrog cov pa roj carbon activated. Tab sis txoj kev no feem ntau tshem tawm ib feem ntawm tus neeg saib xyuas kev ntxhov siab (additive), uas yuav tsum tau ntxiv.

5. Kev tshuaj xyuas. Cov txheej txheem plating yuav tsum siv cov ntsiab lus tseem ceeb ntawm cov txheej txheem cov txheej txheem teev tseg hauv cov txheej txheem tswj. Ib ntus txheeb xyuas qhov muaj pes tsawg leeg ntawm cov tshuaj plating thiab Hull cell test, thiab coj mus rau lub tuam tsev tsim khoom los kho qhov tsis haum ntawm cov tshuaj plating raws li qhov tau txais.

6. Sib tov. Cov txheej txheem nickel plating yog tib yam li lwm cov txheej txheem electroplating. Lub hom phiaj ntawm kev nplawm yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txo qhov kev hloov pauv ntawm qhov concentration thiab ua kom lub siab ntawm qhov tso cai tam sim no. Kuj tseem muaj cov txiaj ntsig tseem ceeb ntawm kev nplawm cov tshuaj plating, uas yog txo lossis tiv thaiv cov pinholes hauv txheej npib tsib xee plating. Feem ntau siv compressed cua, cathode txav thiab yuam kev ncig (sib txuas nrog cov tub ntxhais carbon thiab paj rwb core pom) nplawm.

7. Cathode tam sim no ceev. Cathode tam sim no ceev muaj qhov cuam tshuam rau cathode tam sim no efficiency, deposition npaum li cas thiab txheej zoo. Thaum siv cov electrolyte nrog qis PH rau npib tsib xee plating, nyob rau hauv qhov chaw tsis tshua muaj tam sim no, lub cathode tam sim no efficiency nce nrog nce tam sim no ceev; nyob rau hauv qhov chaw siab tam sim no, lub cathode tam sim no efficiency yog ywj siab ntawm qhov ceev tam sim no; Thaum siv PH ntau dua Thaum electroplating kua nickel, kev sib raug zoo ntawm cathode tam sim no efficiency thiab tam sim no ceev tsis tseem ceeb. Raws li nrog rau lwm hom plating, qhov ntau ntawm cathode tam sim no ceev xaiv rau npib tsib xee plating yuav tsum nyob ntawm seb muaj pes tsawg leeg, kub thiab nplawm tej yam kev mob ntawm cov tshuaj plating.