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COMPOUND COATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE, PAINT ADHESIVENESS OF STEEL SHEET AND CORROSION RESISTANCE OF COATING
COMPOUND COATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE, PAINT ADHESIVENESS OF STEEL SHEET AND CORROSION RESISTANCE OF COATING
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机译：复合涂层钢板的耐蚀性，油漆涂料的粘结性和涂层的耐蚀性优异
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摘要
PURPOSE:To improve corrosion resistance and paint adhesiveness, by applying a chromate coating film to the surface of an alloyed Zn-coated steel sheet, an Al-coated steel sheet, etc., and then forming thereon the film of compound organosilicate resin to which an oxyacid of Mo, W, V, etc. or a salt thereof is added. CONSTITUTION:A chromate coating film is applied to the surface of a Zn-coated steel sheet, a steel sheet coated with alloyed Zn, e.g. Zn-Fe, Zn-Ni, Zn-Mn or Zn-Al, an Al-coated steel sheet or a complex coated steel sheet on which these plating layers are formed under a multilayered condition. Thereafter, the coating film of complex organo-silicate resin prepared by adding one or more of oxyacids of Mo, W, V, Sn, B and Si and/or salts thereof to compound organosilicate resin contg. silica sol, organic resin and a silane compound is formed on said chromate film. This compound coated steel sheet is excellent in corrosion resistance, paint adhesiveness and in corrosion resistance of the coated state.
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