Method of insulating a magnetic lamination
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United States of America Patent
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Sep 24, 1996
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N/A
app pub date -
Sep 11, 1995
filing date -
Sep 12, 1994
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Abstract
A method for making a lamination insulated by iron-manganese phosphate comprises the following operations: 1. The lamination is treated with an acid or basic medium to eliminate the surface layer of the lamination that contains excess silicon and aluminum. 2. The lamination is rinsed. 3. The lamination is brought into contact with a solution of phosphoric acid containing iron phosphate and manganese phosphate for sufficient time to obtain an insulative layer of the required thickness.
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