MANUFACTURE OF GALVANIZED STEEL SHEET
PURPOSE:To manufacture a uniformly plated steel sheet by previously subjecting the surface of a steel sheet to Fe-N composite coating treatment and thereafter applying galvanizing thereto. CONSTITUTION:The surface of a steel sheet whose kind is a one particularly low in plating wettability such as S...
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Zusammenfassung: | PURPOSE:To manufacture a uniformly plated steel sheet by previously subjecting the surface of a steel sheet to Fe-N composite coating treatment and thereafter applying galvanizing thereto. CONSTITUTION:The surface of a steel sheet whose kind is a one particularly low in plating wettability such as Si-added steel and contg. 0.03 to 3% SiO2 is subjected to Fe-N composite coating treatment and is then galvannealed. In this way, since it is excellent in coating corrosion resistance, press formability and weldability, the surface plating of a galvannealed steel sheet as the material used in a wide industrial field such as automobiles, house appliances and building materials can uniformly be applied. |
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