(1) Ntu txheej txheem pretreatment. Nws suav nrog kev tu dej kub, kev kho degreasing, kev tu dej, kev kho deg, kev tu dej, dej cia, plating flux kev kho thiab ziab cov txheej txheem ntawm cov kav hlau. Kev ntxuav dej kub yog tshem tawm cov ntaub ntawv hlau, plua plav, xeb thiab txiav cov ntaub ntawv hlau rau ntawm cov kav dej steel. Thaum ua tiav, cov yeeb nkab steel yog thawj zaug rau hauv lub tank dej kub rau kev ntxuav, thiab cov yeeb nkab steel yog preheated los txhim kho cov nyhuv ntawm cov txheej txheem degreasing thiab pickling tom ntej. Cov kav hlau uas ntxuav tau raug ntxuav hauv cov tshuaj degreasing tank kom tshem tawm cov roj uas muaj nyob rau saum npoo. Lub degreased steel yeeb nkab yog ntxuav nrog dej kub dua kom tshem tawm cov residual alkaline degreasing tov thiab degreasing sediment ntawm cov yeeb nkab steel. Txhawm rau tshem tawm cov xeb thiab hlau oxide nplai ntawm cov kav dej steel, cov kav dej steel tau muab tso rau hauv lub tank pickling, feem ntau yog nyob rau hauv ib qho kev daws nrog corrosion inhibitors ntxiv. Tom qab pickling thiab xeb tshem tawm, cov kav hlau steel yuav tsum tau ntxuav nrog dej kom tshem tawm cov seem ntawm cov kua thiab cov khib nyiab ntawm cov pickling (rau cov kav hlau uas tau ntxuav nrog sulfuric acid, lawv qee zaum rov ua dua tshiab hauv 5% hydrochloric acid tov tank ua rau saum npoo. cov yeeb nkab steel ci ntsa iab thiab pab tau los ntxuav cov hlau sulfate). Cov kav dej khib nyiab yog muab tso rau hauv lub tank tsis muaj zog acidic dej txias rau kev npaj rau cov txheej txheem tom ntej ntawm dipping flux. Lub luag haujlwm tseem ceeb ntawm dip txheej flux yog tshem tawm oxides thiab hlau ntsev ntawm qhov chaw ntawm cov yeeb nkab steel, yog li xyuas kom meej tias qhov chaw ntawm cov yeeb nkab steel tseem huv si thiab yuav tsis rov oxidized ua ntej yuav dipped hauv zinc.
(2) Galvanizing txheej txheem. Cov txheej txheem galvanizing ntu suav nrog kub-dip galvanizing ntawm cov kav hlau. Cov yeeb nkab steel dip-coated nrog plating flux yog qhuav hauv qhov cub kom qhuav thiab preheated txog 200 degree. Cov yeeb nkab steel preheating tuaj yeem txo cov cua sov hauv lub lauj kaub zinc thiab txo qhov kev siv ntawm cov cua sov ntawm zinc lauj kaub, yog li ncua kev pab cuam lub neej ntawm zinc lauj kaub thiab txhim kho kev ua haujlwm. Cov yeeb nkab ci steel xa mus rau hauv lub lauj kaub zinc los ntawm lub tshuab galvanizing thiab tom qab ntawd tshem tawm ntawm lub lauj kaub zinc. Qhov saum npoo ntawm cov yeeb nkab steel yog immersed hauv cov kua zinc txheej. Tam sim ntawd tom qab cov yeeb nkab steel yog dipped nyob rau hauv galvanizing, chav thiab compressed cua yog siv los txau cov txheej sab nraud thiab sab hauv. Qhov no yog kom tshem tawm cov zinc ntau dhau ntawm qhov chaw thiab ua rau cov txheej txheej saum npoo zoo ib yam thiab du.
(3) Tshooj txheej txheem tom qab plating. Cov txheej txheem tom qab plating txheej txheem suav nrog cov txheej txheem los ntawm cov yeeb nkab steel tawm hauv lub lauj kaub zinc kom txias rau chav sov. Uas suav nrog cov cua txias, dej txias, ziab, kev kho mob passivation thiab lwm yam txheej txheem tom qab cov yeeb nkab steel yog cua tshuab sab nraud thiab tshuab sab hauv. Kev ua kom txias tom qab kev txhaj tshuaj tuaj yeem txias cov yeeb nkab steel sai sai thiab nres qhov kev loj hlob ntawm cov hlau-zinc alloy txheej. Galvanized steel kav yuav passivated raws li xav tau. Tom qab passivation, tso rau hauv cov yeeb nkab steel hauv lub tank dej kub kom tshem tawm cov seem seem. Cov dej kub yog siv los ntxuav vim dej kub yog ib qho yooj yim kom qhuav sai. Yog tias tsis muaj kev kho mob passivation, kev kho oiling tuaj yeem ua tau raws li qhov xav tau.
(4) Tshooj txheej txheem tom qab ua tiav. Cov txheej txheem tom qab ua tiav ntawm cov kav hlau steel hais txog kev tshuaj xyuas, xaim xaim, ncaj, luam ntawv, hnyav, bundling thiab ntim cov kav hlau tom qab kub-dip galvanizing.
