Tin-free steel sheets having improved lacquer adhesion

Details Tin-free steel sheets having improved lacquer adhesion Tin-free steel sheets having improved lacquer adhesion

C - Chemistry, Metallurgy

25

D

204/25.5

C25D 3/04 (2006.01)

Patent

CA 1230075

ABSTRACT This invention provides a tin-free steel sheet, having superior lacquer adhesion, comprising metallic chromium and chromium oxide coatings on a steel sheet, characterized in that the chromium oxide coating is controlled such that Image has a value of 0.5 or more provided that Image is the percent transmission corresponding to ol linkage and Image is the percent transmission corresponding to oxo linkage in the infrared absorption spectrum of said chromium oxide coating as measured by Fourier transform infra-red spectroscopy.

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