PROCESS FOR PRODUCING A HOT DIP GALVANIZED STEEL STRIP
- 申请公布号：
- ZA8100437(B)
- 申请号：
- ZA19810000437
- 申请日期：
- 1981.01.22
- 申请公布日期：
- 1982.02.24
- 申请人：
- NIPPON STEEL CORP
- 发明人：
- HAJIME NITTO;KANGO SAKAI;KATUSHI SAITO
- 分类号：
- C22C18/00;C23C2/06
- 主分类号：
- C22C18/00
- 摘要：
- PURPOSE:To enhance the intergranular corrosion resistance and corrosion resistance of a steel sheet coated with an Mg-contg. Zn alloy by hot dipping by adding a little Al to a composition for the sheet. CONSTITUTION:This Zn alloy for a hot dipping composition contains 0.1-2.0% Mg and <=0.01% Al or further contains 0.01-1.0% Sn or 0.001-0.1% Si as alloying elements. The addition of Al inhibits the growth of an Fe-Zn alloy layer and prevents deterioration in the adhesion. The oxidation of the hot dipping bath is also prevented. Such a fixed amount of Sn or Si forms an intermetallic compound together with Zn and Mg and has an effect of preventing discoloration.
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