POSTTREATMENT LIQUID FOR PLATED STEEL SHEET, PLATED STEEL SHEET SUBJECTED TO POSTTREATMENT USING THE SAME, AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a posttreatment liquid for a plated steel sheet with which a film having excellent solder wettability, free from deterioration in the solder wettability even with the lapse of time in particular, and having excellent corrosion resistance can be obtained even when flux free from chlorine is used, to provide a plated steel sheet subjected to posttreatment which is obtained by coating a plated steel sheet with the posttreatment liquid and performing drying, and to provide a production method therefor.;SOLUTION: A posttreatment liquid for a plated steel sheet comprising a water base acrylic resin of 100 to 800 g/L, a rust preventive of 10 to 100 g/L, water soluble rosin of 50 to 600 g/L, a water dispersible silica of 10 to 200 g/L and an antioxidant of 0.5 to 100 g/L, or a posttreatment liquid for a plated steel sheet comprising a water base urethane resin of 100 to 900 g/L, a rust preventive of 10 to 100 g/L, water dispersible silica of 10 to 400 g/L and an antioxidant of 0.5 to 100 g/L is applied to a plated steel sheet so as to be a dry thickness of 0.05 to 10 μm.;COPYRIGHT: (C)2004,JPO&NCIPI