FIELD: metallurgy.
SUBSTANCE: insulation coating on the electrotechnical steel sheet includes Zr and Fe. The Zr content in the coating is from 0.05 upto 1.50 g/m2, based on ZrO2, and the molar ratio of Fe to Zr in the coating is from 0.10 to 2.00. Also, the insulation coating can include Si. The molar ratio of Si to Zr in the coating is 2.00 or less.
EFFECT: high corrosion resistance and high adhesion.
5 cl, 2 dwg, 4 tbl
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