Electromagnetic steel sheet having insulating coating film...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 26/00 (2006.01) B05D 7/24 (2006.01) B32B 15/08 (2006.01) C21D 9/46 (2006.01)

Patent

CA 2631550

An insulating coating film containing a composite resin composed of a polysiloxane and a polymer containing C is formed on the surface of an electromagnetic steel sheet. Consequently, there can be obtained an electromagnetic steel sheet which has an insulating coating film having corrosion resistance and punchability equivalent to or higher than insulating coating films containing Cr.

Selon l'invention, une feuille d'acier électromagnétique qui contient une résine composite composée d'un polysiloxane et d'un polymère contenant C est formée sur la surface d'une feuille d'acier électromagnétique. Par conséquent, il est possible d'obtenir une feuille d'acier électromagnétique qui comporte un film de revêtement isolant présentant une résistance à la corrosion et une aptitude à l'emboutissage équivalentes ou supérieures par rapport à des films de revêtement isolants contenant Cr.

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