Zoo ib yam li cov txheej txheem ntau lawm ntawmkub-dip galvanized steel ntawv, ntau lawm txheej txheem ntawmelectro-galvanized hlaukuj tau txais txoj kev nruam electroplating, uas tau muab faib ua ob kauj ruam: kev kho ua ntej (tu ntu) thiab kev kho tom qab plating. Qhov zoo ntawm cov ntawv electroplated galvanized nyob ntawm qhov loj ntawm kev ntxuav ua ntej electroplating. Lub hom phiaj tseem ceeb ntawm electro-galvanizing tom qab kev kho mob yog txhawm rau txhim kho cov xim pleev xim rau saum npoo thiab kev tiv thaiv corrosion ntawm cov nplooj ntawv galvanized kom ntev lub neej kev pab cuam ntawm cov ntawv galvanized. Kev kho tom qab plating feem ntau suav nrog kev kho phosphating thiab kev kho chromating. Ntxiv rau qhov tsis xws luag hauv thawj lub rooj tsavxwm, kev ua haujlwm tsis raug ntawm ib qho txheej txheem yuav ua rau muaj teeb meem zoo. Feem ntau cov defects muaj xws li:
(1) Pinhole
Hais txog cov pores ntawm cov txheej txheej uas zoo ib yam li cov drilled los ntawm ib rab koob. Txawm hais tias lawv qhov ceev thiab kev faib tawm txawv, thaum pom nyob rau hauv lub iav tsom iav, lawv feem ntau zoo sib xws hauv qhov loj thiab cov duab. Pinholes feem ntau yog cov teeb meem tshwm sim los ntawm adsorption ntawm hydrogen npuas thaum lub sij hawm electroplating txheej txheem. Thaum lub sij hawm cov tshuaj tiv thaiv electroplating, ntau cov npuas yog generated. Yog tias cov npuas no tsis raug tshem tawm hauv lub sijhawm, lawv yuav nyob nruab nrab ntawm qhov chaw ntawm lub sawb thiab cov anode. Lub anode thiab saum npoo ntawm lub sawb yog them los ntawm cov roj txheej, uas cuam tshuam rau cov conductivity, ua rau lub ntsej muag ntawm lub sawb yog ib feem unplated.
(2) Sib
Hais txog qhov tsis sib xws recessed qhov nyob rau saum npoo ntawm txheej, uas yog tus cwj pwm los ntawm cov duab sib txawv, qhov ntau thiab tsawg, thiab qhov tob. Pitting feem ntau yog qhov tsis xws luag los ntawm qhov tsis xws luag hauv substrate lossis adhesion ntawm txawv teb chaws teeb meem thaum lub sij hawm plating.
(3) Burrs (los yog roughness)
Nws yog hais txog cov khoom txawv teb chaws uas tau tsa rau saum npoo ntawm txheej txheej plating thiab muaj kev xav stinging. Nws feem ntau yog tus cwj pwm los ntawm kev ua kom pom tseeb nyob rau sab sauv ntawm lub plating lossis hauv qhov chaw siab tam sim no. Lub thickness ntawm zinc txheej hauv electroplated zinc yog tswj los ntawm kev tswj qhov ceev tam sim no thiab sawb ceev. Ntawd yog, nce qhov ceev tam sim no thiab txo cov sawb nrawm tuaj yeem ua kom cov tuab ntawm zinc txheej. Tab sis qhov no muaj qee qhov txwv. Thaum lub sawb ceev yog tsawg heev thiab qhov ceev tam sim no siab, qhov saum npoo ntawm txheej yuav ua ntxhib, uas yuav cuam tshuam rau qhov zoo ntawm txheej.
(4) Ua npuas ncauj
Hais txog cov vesicles tsa nyob rau saum npoo ntawm txheej, uas yog cov yam ntxwv ntawm qhov sib txawv qhov ntau thiab tsawg, thiab raug cais los ntawm substrate. Feem ntau, nws yog pom tseeb dua nyob rau hauv zinc alloy thiab aluminium alloy coatings.
(5) Peeling (los yog poob)
Hais txog kev tawg-zoo li los yog tsis zoo li tawg-zoo li tshwm sim los ntawm tev tawm ntawm txheej thiab substrate. Feem ntau tshwm sim los ntawm kev kho tsis zoo ua ntej plating.
(6) Cov
Hais txog qhov tsis xws luag xws li xim me ntsis thiab qhov tsaus nti ntawm qhov chaw ntawm txheej. Nws yog tshwm sim los ntawm cov hlau tsis zoo ion deposition nyob rau hauv lub txheej thaum lub sij hawm electroplating txheej txheem, adhesion ntawm txawv teb chaws teeb meem, los yog tsis tiav tu ntawm cov tshuaj passivation tom qab passivation kev kho mob.
(7) Yin thiab Yang sab
Nws hais txog qhov tsis xws luag ntawm qhov tsis sib xws hauv zos qhov ci lossis xim tsis sib xws ntawm cov txheej txheej. Feem ntau, nws qhia tau hais tias muaj qee yam tsis tu ncua hauv cov khoom zoo sib xws.
(8) Ib feem tsis muaj txheej
Muaj qhov tsis xws luag xws li plating ploj, hlau me ntsis lossis cov ntsiab lus sib txawv ntawm qhov ntau thiab tsawg thiab cov duab ntawm cov txheej txheej (tshwj tsis yog cov txheej txheem yuav tsum tau ua).
Ntxiv rau qhov saum toj no-hais defects, txheej txheej tej zaum kuj muaj kev puas tsuaj, khawb, dawb xeb, cov qhab nia, qhov, creases, dub me ntsis, unwashed ntsev kab, dej stains, wipeable los yog tsis xws luag xws li xim av thiab xim av passivation films thiab dendritic, spongy thiab striped coatings. Tag nrho cov teeb meem no yuav muaj qee yam cuam tshuam rau kev siv cov ntawv galvanized.