Galvanized hlau txheej ntxhib, passivation zaj duab xis tsis ci, da dej kub yog siab dhau.Yog hais tias cathode tam sim no siab dhau lawm, zinc cov ntsiab lus hauv da dej yog siab dhau lossis sodium hydroxide thiab DPE cov ntsiab lus yog tsawg heev;Electroplating kev daws teeb meem nrog cov khoom siv los yog cov hlau txawv teb chaws ntau dhau, yuav ua rau muaj teeb meem zoo li no.Kev daws: Yog tias cov yob loj galvanized xaim rau saum txheej txheej yog ntxhib, tej zaum yuav muaj cov khoom siv hauv cov tshuaj plating.Yog hais tias qhov roughness ntawm ib feem yog hnyav, qhov tam sim no ceev yuav siab dhau.
Yog tias cov zinc txheej zoo, tab sis thaum lub teeb tawm hauv 3% nitric acid, muaj cov duab ntxoov ntxoo tsaus ntawm lub txheej, thiab zaj duab xis yog xim av thaum passivation tshwm sim, uas tej zaum yuav tshwm sim los ntawm txawv teb chaws hlau impurities xws li tooj liab lossis txhuas. nyob rau hauv cov kua galvanized.Thaum muaj teeb meem hauv cov txheej txheem ntawm galvanizing, xyuas qhov kub thiab qhov ceev tam sim no ua ntej, thiab tom qab ntawd ntsuas thiab kho cov ntsiab lus ntawm zinc thiab sodium hydroxide hauv da dej los ntawm kev tsom xam ntawm da dej.Txawm hais tias DPE qib qis tuaj yeem txiav txim siab los ntawm Hull cell test.
Yog hais tias lub txheej roughness tsis tshwm sim los ntawm cov saum toj no yog vim li cas, nws yuav tshwm sim los ntawm impurities nyob rau hauv lub plating tov.Muaj peev xwm siv cov tshuaj electroplating me me, tom qab kuaj pom, tom qab ntawd siv me me ntawm cov tshuaj electroplating, tom qab zinc hmoov kho kev sim, xyuas qhov teeb meem yog tshwm sim los ntawm cov khoom siv los yog tooj liab, txhuas thiab lwm yam txawv teb chaws hlau impurities.Kuaj lawv ib tug los ntawm ib tug thiab nws tsis yog ib qho nyuaj rau nrhiav tau qhov teeb meem.Galvanized hlau hlau txheej foaming, khi quab yuam tsis zoo.
Tsis zoo pretreatment ua ntej electroplating;da dej kub tsawg dhau;Tsis zoo additives los yog ntau additives thiab organic impurities tuaj yeem ua rau kev sib raug zoo tsis zoo.Qhov zoo ntawm cov additive kuj muaj qhov cuam tshuam rau txheej foaming.Qee cov additives reacts tsis tiav thaum synthesis thiab txuas ntxiv mus rau polymerize thaum lub sij hawm ntev cia los yog siv.Cov additive zoo li distort lub lattice thiab tsim kev ntxhov siab, ua rau lub txheej rau blister.
Thaum cov yob loj galvanized hlau galvanizing txheej txheem txheej foaming, thawj zaug xyuas lub da dej kub.Yog tias chav da dej kub tsis qis, ces ntxiv dag zog rau cov plating ua ntej tshem cov roj, tiv thaiv cov hlau matrix hauv acid corrosion.Yog tias koj them sai sai rau cov teeb meem no, qhov tshwm sim foaming tseem tshwm sim, nws yuav tsum tau them sai sai rau tus nqi thiab qhov zoo ntawm cov khoom siv ntxiv, ces koj tuaj yeem nres ntxiv cov khoom ntxiv, nrog rau cov electrolysis siab tam sim no rau ib lub sijhawm, txhawm rau txo cov ntsiab lus ntawm additives, saib seb lub foaming phenomenon yog zoo dua.Yog tias tseem tsis muaj kev txhim kho, nws yuav tsum tau xyuas seb lub sijhawm khaws cia ntawm cov khoom siv ntxiv ntev dhau lawm, lossis seb puas muaj ntau cov impurities hauv cov khoom ntxiv.
Post lub sij hawm: 18-04-23