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Chromate passivation treatment of galvanized sheet can form passivation film, its chemical reaction formula is as follows: Zn+H2GrO4-ZnGrO2=H2The trivalent chro···
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large zinc flower is normal zinc flower, according to the normal production process can produce large zinc flower, its crystal core diameter is not less than 0.···
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Dark spots are formed by further oxidation of white rust. The main causes of white rust are:Poor passivation, passivation film thickness is not enough or uneven···
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The main reasons for zinc layer shedding are: Surface oxidation, silicon compounds, cold bound emulsion is too dirty, NOF section oxidation atmosphere and prote···
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