| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electromagnetic steel sheet with an insulation coating which can be subjected to stress relieving annealing, and has excellent corrosion resistance in the presence of chlorine ions and adhesion after stress relieving annealing. <P>SOLUTION: The electromagnetic steel sheet with an insulation coating having excellent corrosion resistance in the presence of chlorine ions and adhesion after stress relieving annealing has the multilayer coating obtained by forming a film with a thickness of 0.2 to 1 μm comprising a phosphorous compound as a first layer on the surface of a silicon steel sheet, and further forming a film with a thickness of 0.1 to 2 μm comprising a silicate and organic resin emulsion with a particle diameter of 0.3 to 2.5 μm as a second layer on the upper layer thereof. The phosphorus compound comprises one or more selected from an inorganic phosphoric acid, inorganic phosphate, organic phosphoric acid and organic phosphate. <P>COPYRIGHT: (C)2004,JPO |
