GALVANIZED STEEL PLATE ALLOY-MELTED AND PRODUCTION METHOD THEREOF

摘要

PURPOSE: An alloyed steel plate coated a melted zinc and its production method are provided to simplify a plating process and to improve the processing property of phosphate, an electro coating property, and the corrosion by plating a upper layer of the flash coated steel plate with a vacuum depositing method and by applying a Mn metal as the upper coated group. CONSTITUTION: Mn of a upper layer is needed at least sticking amount because the Mn is converted to a film of phosphate at a processing of the phosphate. In using for a coating growth, the productivity is reduced and a cost of material is increased according to an increase of stuck amount because the unnecessary corrosion is contained when the stuck amount of Mn is over 30g/m2. Therefore, the stuck amount of Mn is desirable within 3-30g/m2. A layer coated the Mn having a fine adhesive property is formed at a temperature of an alloyed steel plate coated a melted zinc as a material over 50°C. When the temperature of the material is over 350°C, the alloyed layer coated the melted zinc is evaporated on a surface of the material. Therefore, the temperature of the alloyed steel plate coated the melted zinc is desirable at 50-350°C.