| 摘要 |
PROBLEM TO BE SOLVED: To provide such a post-treatment liquid for a post-treated plated steel sheet as to form a film which has a superior wettability with a solder even when a chlorine-free flux is used, particularly does not make the wettability with the solder deteriorate even after the elapse of time, and besides, superior corrosion resistance, to provide a post-treated plated steel sheet made by coating the treatment liquid onto a plated steel sheet and drying it, and to provide a manufacturing method therefor. SOLUTION: The post treatment liquid for the plated steel sheet comprises 100-800 g/L of a water-based acrylic resin, 10-100 g/L of a rust-preventive agent, 50-600 g/L of a water-solubilized rosin and 0.5-100 g/L of an oxidation inhibitor; or 100-900 g/L of a water-based urethane resin, 10-100 g/L of a rust-preventive agent and 0.5-100 g/L of an oxidation inhibitor. The post-treated plated steel sheet is made by coating the above liquid onto a plated steel sheet so as to make a dried film thickness to be 0.05-10μm. COPYRIGHT: (C)2004,JPO&NCIPI
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