MAGNETIC STEEL SHEET WITH SEMI-ORGANIC INSULATION COATING

摘要

In a semi-organic insulation coating comprising an inorganic component and an organic resin, a Zr compound and an Si compound containing a plate-like silica as an inorganic component are included in a ratio in a dry coating of 20 to 70 mass% of Zr compound (converted to ZrO2) and 10 to 50 mass% of Si compound containing plate-like silica (converted to SiO2), and the remainder is substantially an organic resin, whereby there can be provided a magnetic steel sheet with a semi-organic insulation coating having no deterioration of corrosion resistance and water resistance without containing a chromium compound and being excellent in the powdering resistance, scratch resistance, sticking resistance, TIG weldability and punchability but also the coating appearance.