Coating processes – Immersion or partial immersion – Metal base
Reexamination Certificate
2011-08-16
2011-08-16
Turocy, David (Department: 1715)
Coating processes
Immersion or partial immersion
Metal base
C427S435000, C427S430100, C427S328000
Reexamination Certificate
active
07998533
ABSTRACT:
The present invention provides a highly corrosion-resistant plated steel sheet that can achieve excellent surface smoothness and formability and, according to the process of the present invention, a hot-dip galvanized steel product excellent in surface smoothness and formability having on the steel product surface a zinc alloy plating layer composed of 4 to 22% by mass of Al, 1 to 5% by mass of Mg, 0.000001 to 0.1% by mass of Ti, 0.000001 to 0.5% by mass of Si and the balance of Zn and unavoidable impurities, the plating layer of the plated steel product having a metal structure in which an [Mg2Si phase], an [Al phase], a [Zn2Mg phase] and a [Zn phase] are present in a mixture in the matrix of an [Al/Zn/Zn2Mg ternary eutectic structure], and the plating layer containing a Ti—Al base intermetallic compound in the [Al phase] and/or the [Zn2Mg phase] and/or the [Zn phase], is produced.
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Hatanaka Hidetoshi
Honda Kazuhiko
Onozawa Hajime
Kenyon & Kenyon LLP
Nippon Steel Corporation
Turocy David
LandOfFree
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