| 摘要 |
PROBLEM TO BE SOLVED: To provide a joined structure of a panel material for an automotive outer or inner board formed on the surface of a nonplated steel sheet, in which a chemical film in the vicinity of a superposed part between a galvanized steel sheet and the nonplated steel sheet is tightly adhered with the nonplated steel sheet. SOLUTION: This structure is the one in which a plated steel sheet 4 in which, on both sides of a steel sheet 1, galvanizing layers 2a and 2b are formed, and also, on the surface of at least either galvanizing layer 2b, a plating layer 3 of a metal or an alloy having the standard potential equal to or above that of Fe is formed is superposed with a nonplated steel sheet 5 with the metallic or alloy plating layer 3 as the superposed face side. |
