Patent ID: 11948710
Assignee: NIPPON STEEL CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H  B | IPC B  C  H

Claim 0:
1. A non-oriented electrical steel sheet comprising:
a base metal steel sheet; and
a composite coating film including Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet, wherein
the non-oriented electrical steel sheet contains crystalline aluminum phosphate showing diffraction lines belonging to ICDD No. 01-074-3256 when the composite coating film is measured by a wide-angle X-ray diffraction method, and
when a plurality of the non-oriented electrical steel sheets are laminated with a contact area of 9 cm? and are pressed with an interfacial pressure being 40 kgf/cm2 and after the non-oriented electrical steel sheets are retained in an atmosphere at a temperature of 50° C. and a humidity of 90% for 56 days, a vertical peel-off force measured at room temperature is 1000 g or less.