COATED SUBSTRATE FOR PACKAGING APPLICATIONS AND A METHOD FOR PRODUCING SAID COATED SUBSTRATE

摘要

This relates to a coated substrate for packaging applications including a recrystallisation annealed single reduced steel substrate or a double reduced steel substrate subjected to recrystallisation annealing between the first and second cold rolling treatment, wherein one or both sides of the substrate is coated with an iron-tin alloy layer which contains at least 80 weight percent (wt. %) of FeSn (50 at. % iron and 50 at. % tin) and wherein the iron-tin alloy layer or layers are provided with a chromium metal-chromium oxide coating layer produced by a trivalent chromium electroplating process, and wherein the thickness of the chromium metal-chromium oxide coating layer corresponds to at least 20 mg Cr/m2 and a process for producing the coated substrate.

主权项

1. A coated substrate for packaging applications comprising
a recrystallisation annealed single reduced steel substrate or a double reduced steel substrate which was subjected to recrystallisation annealing between the first and second cold rolling treatment,wherein one or both sides of the substrate is coated with an iron-tin alloy layer which contains at least 85 weight percent (wt. %) of FeSn (50 at. % iron and 50 at. % tin) and wherein the iron-tin alloy layer or layers are provided with a chromium metal-chromium oxide coating layer produced by a trivalent chromium electroplating process, and wherein the thickness of the chromium metal-chromium oxide coating layer corresponds to at least 20 mg Cr/m2, and wherein the Cr-oxides are not present as a distinct layer on the outermost surface of the chromium metal-chromium oxide coating layer but wherein the oxides are dispersed in the layer.