| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple method capable of enhancing corrosion resistance and discoloration resistance of a surface of a phosphate coated film or a galvannealed film, and adhesiveness of the coating film, and containing no compositions harmful to the environment. SOLUTION: The present invention copes with the surface treatment other than the plating. When generally performing the coating or solid lubrication after the phosphate chemical conversion coating or galvannealing processing, a surface of a parts is once dried, and brought to the next step, or if rust is generated during this time, the surface is discolored to give adverse effect to the next step. Thus, protection of the surface of the parts from rust or discoloration affects much on the performance of the next step. Thus, a safe and simple solution is to provide a method effective and simple for the surface stabilization of the parts after the phosphate chemical conversion coating or the galvannealing processing. The surface after the phosphate chemical conversion coating or galvannealing processing is brought into contact with aqueous solution containing a cerium salt by≥25 ppm, and washed in water and dried. COPYRIGHT: (C)2005,JPO&NCIPI
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