Khoom Description
Lub hauv paus khoom ntawm cov xim-coated coils tuaj yeem yog txias-dov coils lossis kub-dip / electroplated steel. Txawm hais tias cov organic txheej txheej ntawm cov xim-coated coils muaj cov txiaj ntsig zoo los tiv thaiv corrosion, tseem muaj qee qhov sib txawv me me hauv cov txheej txheem organic, Huab cua thiab noo noo tuaj yeem nkag mus thiab ua rau cov substrate xeb, yog li cov xim coated coil ua los ntawm ib qho. uncoated substrate muaj lub neej ua haujlwm luv luv, thiab nws yooj yim kis tau tom qab khawb thiab ua rau cov txheej tev tawm. Lub hauv paus khoom ntawm cov xim coated coils feem ntau yog galvanized steel los yog galvanized alloy steel.
Cov txheej txheem ntau lawm
Cov txheej txheem ntau lawm ntawm pre-painted gavalnized steel kauj yog muab faib ua pretreatment ntawm lub substrate, chemical conversion txheej (non-organic hlau txheej), thiab organic non-metallic txheej, thiab qee cov kab ntau lawm kuj muaj cov txheej txheem tom qab txheej.
1. Substrate pretreatment
Yog tias cov ntawv hlau galvanized siv los ua cov khoom siv hauv paus tsis ncaj qha rau hauv cov txheej txheem xim txheej tom qab tsim khoom, xeb (dawb xeb), plua plav, thiab lwm yam paug tuaj yeem tshwm sim thaum lub sijhawm thauj mus los. Yog tias cov no tsis tuaj yeem raug tshem tawm, nws yuav cuam tshuam rau qhov zoo ntawm cov xim txheej. Qhov zoo thiab tag nrho cov khoom ntawm lub cev thiab tshuaj lom neeg ntawm cov xim coated tiav yog ze ze rau kev kho ua ntej. Tsis tas li ntawd, tom qab galvanizing, roj yog siv rau kev tiv thaiv xeb, thiab cov roj no kuj yuav tsum tau muab tshem tawm ua ntej xim txheej. Txoj kev pretreatment siv tam sim no yog alkaline kua degreasing txoj kev.
2. Tshuaj hloov txheej txheej
Muaj ob txoj haujlwm, ib qho yog txhawm rau txhim kho kev tiv thaiv xeb ntxiv, thiab lwm qhov yog txhawm rau txhim kho qhov adhesion ntawm cov khoom siv hauv paus thiab txheej txheej, thiab txhim kho cov txheej txheem txheej txheej ntawm substrate.
Feem ntau muaj peb kauj ruam: ib qho yog phosphating, ua ntej ib tug loj tus naj npawb ntawm crystals yog tsim nyob rau hauv cov hlau nto, thiab ces ib tug phosphate zaj duab xis yog tsim rau ntawm cov hlau nto nrog ib tug phosphate tov; Cov ntsev reacts chemically nrog cov pores los tsim ib zaj duab xis tiv thaiv. Qhov thib peb yog cov dej ntshiab huv, siv cov dej desalted los yog deionized los ntxuav cov kua passivation
Cim npe nrov: Tuam Tshoj pre-painted gavalnized steel kauj manufacturers, lwm tus neeg, Hoobkas
