| 摘要 |
PROBLEM TO BE SOLVED: To form a chemically treated film having excellent shieldability from environment, corrosion resistance and workability on the surface of a zinc plated steel plate by promoting to convert a titanium compound into a high polymer. SOLUTION: The chemical treatment liquid contains a soluble titanium compound acting as a deposition component, phosphoric acid and/or phosphate and an oxidizing agent for converting an oxide or fluoride of the titanium precipitated on a zinc plated layer from the soluble titanium compound into the high polymer. The soluble titanium compound is preferably a titanium fluoride containing fluorine having Fe/Ti conversion molar ratio of≥5. Manganese phosphate is used as a typical phosphate. The oxidizing agent includes oxygen acid of valve metal, the oxoate, peroxide, nitric acid, nitrate, etc., of the valve metal, etc. The chemical treatment liquid may contain an organic acid or organic acid salt, tannic acid, lubricating oil, etc. COPYRIGHT: (C)2004,JPO
|
