| 摘要 |
PROBLEM TO BE SOLVED: To provide a colored surface treated steel sheet which can be soldered, and has excellent solder wettability. SOLUTION: A colored surface treatment film in which solder wettability by a meniscograph method is <10 sec is formed on a plated steel sheet. Concretely, achromatic or chromatic color pigment is further incorporated into a water based urethane resin, a water based acrylic resin containing water soluble rosin, or a resin obtained by incorporating water dispersible silica, an oxide preventive or the like into these resins, and the plated steel sheet is coated with the same, and drying is performed, by which a colored surface treatment film is formed to obtain the colored surface treated steel sheet. COPYRIGHT: (C)2004,JPO&NCIPI
|
