Claims
- 1. A Zn-Mg alloy plated metal material of excellent corrosion resistance consisting essentially of a vapor deposited layer comprising 0.5-40% by weight of Mg and the substantial balance of Zn formed on the surface of a metal substrate, wherein the Zn-Mg alloy vapor deposited layer mainly consists of Zn-Mg intermetallic compounds comprising one or more of Mg.sub.2 Zn.sub.11, MgZn.sub.2 and MgZn, and not substantially containing a phase consisting of only Mg.
- 2. The Zn-Mg alloy plated metal material as defined in claim 1, wherein said vapor deposited layer contains a phase consisting of only Zn.
- 3. The Zn-Mg alloy plated metal material as defined in claim 1 or 2, wherein a corrosion product layer is formed on the surface of the Zn-Mg alloy vapor deposited layer, said corrosion product layer comprising Mg and ZnCl.sub.2.4Zn(PH).sub.2, and hexagonal system crystals of the ZnCl.sub.2 4Zn(PH).sub.2 are oriented in the direction of the Zn-Mg alloy plating thickness.
- 4. The Zn-Mg alloy plated metal material as defined in claim 1, wherein said vapor deposit layer comprises 5-25 wt. % Mg.
- 5. The Zn-Mg alloy plated metal material as defined in claim 2, wherein said vapor deposit layer comprises 5-25 wt. % Mg.
Parent Case Info
This is a division of application Ser. No. 07/293,419, filed on Jan. 4, 1989 now U.S. Pat. No. 5,002,837.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4401727 |
Berke et al. |
Aug 1983 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
293419 |
Jan 1989 |
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