| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a phosphating solution suitable for forming a coating film superior in workability, corrosion resistance and adhesiveness to a paint film. <P>SOLUTION: The phosphating solution is prepared by adding an polyamine-based organic inhibitor with a molecular weight of 200 to 30,000 having at least one functional group of -NH<SB>2</SB>and =NH in an amount of 0.01 to 5 mass%, to a treatment solution containing phosphate ions in an amount of 0.03 to 0.5 mol/l. The polyamine-based organic inhibitor is preferably an aliphatic amine such as polyethylamine, polyethyleneimine, polyetheramine and polyaminoacrylate. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
