Chemical conversion treatment solution, chemical conversion treatment method in which same is used, and chemical conversion coating
AssigneeDipsol Chemicals Co., Ltd.
InventorsRyuta Kashio, Masatoshi Ishikawa, Tomitaka Yamamoto
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Abstract
The present invention addresses the problem of providing a chemical conversion treatment solution that contains zirconium ions and that makes it possible to form a highly corrosion-resistant chemical conversion coating formed with consideration for the environment as well. The present invention provides a chemical conversion treatment solution that contains trivalent chromium ions, zirconium ions, aluminum ions, at least one type of carboxylic acid ions, and at least one type of silicon compound, the chemical conversion treatment solution being free of fluorine ions and fluorine compounds.
Claims16
A chemical conversion treatment solution comprising:
- trivalent chromium ions;
- zirconium ions;
- aluminum ions;
- at least one type of carboxylate ions;
- and
- at least one type of silicon compounds, wherein
- a content of the zirconium ions in the chemical conversion treatment solution is 0.01 to 5 mmol/L;
- a content of the aluminum ions in the chemical conversion treatment solution is 0.01 to 0.30 g/L;
- a total content of the silicon compound in the chemical conversion treatment solution is 0.5 to 11 g/L in terms of silicon;
- and
- the chemical conversion treatment solution comprises no fluorine ions and fluorine compounds.
Dependencies are inferred from the claim text.