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US 6,309,477 B1Granted
Non-chromium pretreatment chemicals
AssigneeNippon Paint Co., Ltd.
InventorsToshiaki Shimakura, Yutaka Wada, Takayuki Fukuoka
Life of this patent
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Abstract
The present invention is relates to pretreatment chemicals metal materials to be painted containing at least one kind of sulfur-containing compounds and at least one of phosphorus ion-containing compounds, and an anticorrosive treatment of metal materials, by the pretreatment chemicals.
Claims6
A pretreatment composition for metal materials to be painted, which consists of:
- 0.1 to 50 g of at least one of sulphur-containing compounds selected from the group consisting of sulfides, triazinethiols, thiocarbonyl group-containing compounds, thiosulfuric acid, thiosulfates, persulfuric acid, and persulfates, 0.1 to 50 g of at least one of phosphorus ion-containing compounds selected from the group consisting of phosphate ion, phosphite ion, hypophosphite ion, condensed phosphate ions, phytate ion, and phosphonate ion,
- 1 to 500 g of an anticorrosion additive, and
- the rest water,
- in one liter of the pretreatment composition, wherein the pH of the composition is adjusted to 2 to 12.
1 more element
A pretreatment composition for metal materials to be painted, which consists of:
- 0.1 to 50 g of at least one of sulphur-containing compounds selected from the group consisting of sulfides, triazinethiols, thiocarbonyl group-containing compounds, thiosulfuric acid, thiosulfates, persulfuric acid, and persulfates,
- 0.1 to 50 g of at least one of phosphorus ion-containing compounds selected from the group consisting of phosphate ion, phosphite ion, hypophosphite ion, condensed phosphate ions, phytate ion, and phosphonate ion,
- 1 to 500 g of water-dispersible silica, and
- the rest water,
- in one liter of the pretreatment composition, wherein the pH of the composition is adjusted to 2 to 12.
2 more elements
Dependencies are inferred from the claim text.