Insulating coating film for electromagnetic steel sheet
A technology of insulating film and electromagnetic steel sheet, applied in the fields of inorganic material magnetism, metal material coating process, heat treatment equipment, etc., can solve the problems of deterioration of weldability and riveting, and ensure rust resistance, excellent weldability, riveting and other problems. Excellent effect
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[0096] A coating solution containing the components shown in Table 1 was applied to the surface of a 0.5 mm thick electrical steel sheet containing 0.3 mass % Si under the conditions shown in Table 1, and then fired to form insulating coatings on both sides. Thereafter, the structure of the insulating film (presence or absence of enrichment layer) and the enrichment amount were investigated by GDOES and ICP-AES. Then, the evaluation of the rust resistance and solderability of the insulating coating was performed. The results are summarized in Table 1. In the same manner, a chromate insulating film for comparison was prepared and evaluated.
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