| abstract |
(57) [Problem] To provide a surface-treated metal plate excellent in press galling resistance and coil deformation resistance, and a manufacturing method capable of obtaining the surface-treated metal plate. SOLUTION: An aqueous resin or / and a silicate compound and water have a molecular weight of 600 in an upper layer of a plating metal plate 3 in addition to water. Aqueous organic-inorganic composite coating material comprising a lubricant (A) 1 which is a polyolefin wax dispersion having a molecular weight of 0 to 15,000 and, if necessary, a lubricant (B) 5 which is a polyolefin wax dispersion having a molecular weight of 1,000 to 5,000 ( E) 0.05 to 0.3 g in terms of dry mass / M 2 after coating, baking to form a first layer, and then comprising an aqueous resin or / and a silicate compound, colloidal silica and water, and having a colloidal silica content of 5 to 5 in terms of solid content. The aqueous organic-inorganic composite coating material (F), which is 35% by mass, is 0.5 to 5.0 g / m2 in terms of dry mass. After 2 coating, baking to form a second layer. |