Steel sheet including a multilayer coating and methods

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United States of America Patent

PATENT NO 9670576
SERIAL NO

13995107

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Abstract

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A steel sheet is provided. The steel sheet includes a multilayer coating including at least one zinc-based layer being 0.1% to 20% magnesium by weight which is covered by a fine temporary protective layer of 5 to 100 nm. The fine temporary protective layer is composed of metal or metal oxide selected from the group consisting of aluminum, chromium, aluminum oxides AlOx, with x being strictly between 0.01 and 1.5 and chromium oxides CrOy, with y being strictly between 0.01 and 1.5. The at least one zinc-based layer is not alloyed with the temporary protective layer. Manufacturing methods for a sheet and part are also provided.

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Patent Owner(s)

Patent OwnerAddress
ARCELORMITTAL INVESTIGACION Y DESARROLLO S L48910 SESTAO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Allely, Christian Metz, FR 45 135
Chaleix, Daniel Verny, FR 26 79
Chassagne, Julie Liege, BE 2 18
Jacques, Daniel Thionville, FR 7 13
Monnoyer, Maxime Sainte-Marie-Aux-Chenes, FR 9 25

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