Corrosion resistant surface-treated steel strip and process...

Details Corrosion resistant surface-treated steel strip and process... Corrosion resistant surface-treated steel strip and process...

C - Chemistry, Metallurgy

25

D

204/25, 204/22.6

C25D 3/56 (2006.01) C23C 22/78 (2006.01) C23C 28/00 (2006.01) C23F 11/18 (2006.01) C25D 5/10 (2006.01) C25D 7/06 (2006.01)

Patent

CA 1255246

ABSTRACT OF THE DISCLOSURE A steel strip having an Fe-P alloy with a phosphorus content of 0.0003% to 15% by weight electrodeposited as an uppermost layer on at least one surface of the strip is provided as well as a process for making. The Fe-P alloy may be electrodeposited onto a cold rolled steel strip either directly or via an underlying layer of zinc or zinc alloy previously electrodeposited onto the strip. The uppermost Fe-P plating layer on the strip may be chemically treated with a phosphate to form a phosphate film which provides improved corrosion resistance without paint coating thereon.

453964

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