C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/07 (2006.01) B05D 5/12 (2006.01) B05D 7/14 (2006.01) C09D 5/08 (2006.01) C23C 22/74 (2006.01) H01F 1/18 (2006.01) H01F 27/245 (2006.01) H02K 1/04 (2006.01) C21D 8/12 (2006.01)
Patent
CA 2145975
An electromagnetic steel sheet having a corrosion-resistant electrically insulating film. The insulating film is formed by spraying and baking, on the steel sheet, a treating liquid containing an emulsion of fine resin particles, a reducing agent and an accelerator. The emulsion of fine resin particles exhibits a weight change peak temperature of not lower than about 400°C as measured by differential thermal weight measurement conducted while raising the emulsion temperature at a constant rate of temperature rise. The emulsion also substantially resists when contacted by phosphoric acid. The reducing agent is a phosphate ion aqueous solution containing a metal. Also disclosed is a corrosion-resistant core made from the electromagnetic steel sheet.
Kobayashi Hideo
Komori Yuka
Kosuge Norio
Jfe Steel Corporation
Kawasaki Steel Corporation
Smart & Biggar
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