Surface treated steel plate and method for production thereof

Details Surface treated steel plate and method for production thereof Surface treated steel plate and method for production thereof

C - Chemistry, Metallurgy

23

C

C23C 22/28 (2006.01) C23C 2/26 (2006.01) C23C 22/30 (2006.01) C23C 22/33 (2006.01) C23C 22/73 (2006.01) C23C 22/83 (2006.01) C23C 26/00 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2380384

A surface-treated steel sheet includes a steel sheet, an Al-Zn-base alloy plating layer formed on the steel sheet, a chemical conversion film provided on the alloy plating layer, and a concentric layer of a Cr compound that is formed on the alloy plating layer of the chemical conversion film. The surface-treated steel sheet may include a steel sheet, an zinc-base plating layer formed on the steel sheet, and a film that contains chromium and calcium and that is formed on the zinc-base plating layer.

L'invention concerne une plaque d'acier traitée en surface, comprenant une plaque d'acier, une couche d'électrodéposition à base d'un alliage d'aluminium et de zinc formée sur la plaque d'acier, un revêtement chimique formé sur la couche d'électrodéposition à base d'alliage, et une couche présentant une concentration plus importante d'un composé de Chrome formée sur un côté de la couche d'électrodéposition à base d'alliage du revêtement chimique. L'invention concerne également une plaque d'acier traitée en surface, comprenant une plaque d'acier, une couche d'électrodéposition à base d'un alliage de zinc formée sur la plaque d'acier, et un revêtement contenant du chrome et du calcium formé sur la couche d'électrodéposition à base d'un alliage de zinc.

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