Process for coating ferrous product with Al-Zn-Si alloy

Details Process for coating ferrous product with Al-Zn-Si alloy Process for coating ferrous product with Al-Zn-Si alloy

1995-02-23

1995-12-26

Utech, Benjamin

Coating processes

With post-treatment of coating or coating material

Heating or drying

427433, 427436, 4273837, B05D 302

Patent

active

054786002

ABSTRACT:
An Al-Zn-Si base alloy coat including an Al-Zn-Si-Fe alloy layer which has remarkable high corrosion resistance is formed on an article. A ferrous base material is used as the article to provide Fe to the alloy layer. The alloy layer of the present invention consists of 55 to 65 wt % of Al, 25 to 35 wt % of Zn, 5 to 10 wt % of Fe, and 2 to 4 wt % of Si, and also has a cross sectional area of 15 to 90% of the entire cross sectional area of the alloy coat. A process for forming the alloy coat of the present invention comprises the step of dipping the article into a molten bath of Zn to form, on the article, an undercoat which results from a reaction between Fe of the article and Zn in the molten bath, and then dipping the undercoat into an alloy molten bath of Al, Zn and Si to form the alloy coat of the present invention on the undercoat.

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patent: 4456663 (1984-06-01), Leonard
patent: 4722871 (1988-02-01), Radtke

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