DX51D Galvanized Sawb Ntau Lawm Txheej Txheem

Txheej txheem ntau lawm:
Thawj theem: pickling thiab decontamination ntawm tag nrho cov yob ntawm sawb hlau ua kom lub ntsej muag ci thiab huv si.
Qhov thib ob theem: tom qab pickling, nws yog ntxuav nyob rau hauv ammonium chloride los yog zinc chloride aqueous tov los yog tov ammonium chloride thiab zinc chloride aqueous tov tank, thiab ces xa mus rau lub kub dip tank rau galvanizing.
Qhov thib peb theem: tom qab lub sawb hlau yog galvanized, nws yog dov thiab muab tso rau hauv cia. Cov txheej txheej galvanized feem ntau tuaj yeem tsis tsawg dua 500g / m2 raws li tus neeg siv khoom xav tau, thiab ib qho qauv yuav tsum tsis pub tsawg dua 480g / m2.
Tom qab kev kho mob ntawm galvanized strip steel muaj xws li passivation, pre phosphating thiab oiling. Ua ntej tshaj plaws, kev kho mob passivation yuav tsum tau nqa tawm ntawm galvanized sawb hlau, uas tuaj yeem txhim kho cov qauv saum npoo thiab luster ntawm zinc txheej, txhim kho corrosion kuj thiab kev pab cuam lub neej ntawm zinc txheej, thiab txhim kho cov adhesion ntawm txheej thiab cov txheej txheem. puag hlau. Kev kho chromate passivation feem ntau yog siv. Qee cov activators, xws li fluoride, phosphoric acid los yog sulfuric acid, yog ntxiv rau cov tshuaj passivation kom tau ib tug tuab chromate zaj duab xis tom qab passivation. Thaum muaj cov tshuaj fluoride nyob rau hauv cov tshuaj passivation, qhov nro ntawm cov hlau sawb tuaj yeem txo qis, cov yeeb yaj kiab tsim cov tshuaj tiv thaiv tuaj yeem ua kom nrawm dua, thiab cov tshuaj polishing tuaj yeem nce ntxiv kom cov yeeb yaj kiab passivation zoo thiab ci.

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