Dab tsi yog electroplating lead - tin alloy

Lead - tin alloy plating yog dav siv hauv kev lag luam. Los ntawm kev hloov cov concentration piv ntawm ob hlau ions nyob rau hauv lub plating tov, muaj ntau yam hlau lead - tin alloys nrog txawv txhuas thiab tin txheem. Alloys muaj 6% rau 10% tin nyob rau hauv lub txheej yog plated ntawm steel strips los txhim kho corrosion kuj, solderability thiab adhesion rau xim, thiab muaj zoo lubricating zog; coatings muaj 15% rau 25% tin feem ntau yog siv rau hauv qhov chaw lubrication, adhesion thiab soldering; alloy txheej muaj 45% rau 55% tin tuaj yeem siv los tiv thaiv corrosion ntawm seawater thiab lwm yam xov xwm; txheej muaj 55% rau 65% tin tuaj yeem txhim kho qhov kev sib tw ntawm qhov chaw ntawm cov khoom siv hluav taws xob. Ntxiv 1% rau 3% ntawm cov hmoov txhuas rau cov tin ntshiab tuaj yeem tiv thaiv kev tsim ntawm" tin whiskers". Cov ntsiab lus ntawm tin nyob rau hauv cov hlau lead - tin alloy txheej nce nrog qhov nce ntawm cov ntsiab lus tin thiab tam sim no ceev hauv da dej.

Tus qauv electrode muaj peev xwm sib txawv ntawm cov hlau lead thiab tin yog me me (Pb / Pb2 + yog - 0.126V, Sn / Sn2 + yog - 0.136V), thiab cov hydrogen overpotential yog siab, yog li nws tuaj yeem tswj tau los ntawm kev tswj cov tin. cov ntsiab lus piv thiab qhov ceev tam sim no hauv chav da dej. Yuav kom ua tiav co - deposition nyob rau hauv ib tug yooj yim muaj zog acid plating tov, lead - tin alloy coatings ntawm ntau yam yuav tsum proportions yog tau.

1) Lub alloy txheej nrog tin loj feem ntawm 5 % rau 15% muaj kev tiv thaiv zoo - corrosion kev ua tau zoo thiab lubricating kev ua tau zoo, thiab feem ntau yog siv los tiv thaiv - corrosion ntawm steel khoom.

2) Lub alloy txheej nrog ib pawg loj ntawm 6% rau 20% ntawm tin tau zoo heev hnav - txo kev ua tau zoo thiab feem ntau yog siv rau electroplating rau saum npoo ntawm zawv zawg bearings.

3) Lub alloy txheej nrog ib pawg loj ntawm 60 % rau 65% ntawm tin muaj zoo heev corrosion kuj thiab solderability, thiab feem ntau yog siv rau electroplating ntawm luam Circuit Court boards.

4) Lub alloy txheej nrog tin loj feem ntawm 75 % rau 90% muaj zoo solderability thiab feem ntau yog siv nyob rau hauv electroplating ntawm hluav taws xob tivthaiv leads.

5) Yog 1% rau 3% txhuas yog ntxiv rau cov ntshiab tin plating, nws tuaj yeem tiv thaiv kev tsim cov tin whiskers.