| 摘要 |
PROBLEM TO BE SOLVED: To provide a galvanized steel sheet having a surface treated film, without including a chromium compound in a surface treated film and excellent in blackening resistance, flaky plating peeling resistance and corrosion resistance after performing heavy ironing processing, such as (1) planar part corrosion resistance, (2) black discoloration resistance, (3) stain water resistance and (4) continuous high-speed press forming.SOLUTION: The galvanized steel sheet having a surface treated film comprises: a galvanized steel sheet; a first film on the galvanized plating steel sheet; and a surface treated film including a second film on the first film. The first film is obtained from a first surface treatment liquid containing a carbonic acid zirconium compound (A), a phosphoric acid compound (B) and a silane compound (C). The second film is obtained from a second surface treatment liquid containing the phosphoric acid compound (B) and the silane compound (C) without including the carbonic acid zirconium compound (A). |
