Insulating coating for electrical steel sheet
AssigneeNippon Steel Corporation
InventorsShuichi Yamazaki, Masaru Takahashi, Kazutoshi Takeda, Hiroyasu Fujii, Akira Akagi, Hiroki Hori
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Abstract
An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal. An enrichment of the divalent metal contained in the enriched layer is 0.01 g/m2 or more and less than 0.2 g/m2.
Claims2
An insulating coating for an electrical steel sheet that is formed on a surface of a base metal of the electrical steel sheet, wherein
- the insulating coating comprises a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and
- the insulating coating has an enriched layer of a divalent metal at an interface with the surface of the base metal, wherein
- an enrichment of the divalent metal contained in the enriched layer is 0.01 g/m2 or more and less than 0.2 g/m2.
Dependencies are inferred from the claim text.