Patent ID: 6309477
Filing Date: 2001-10-30
Classification: C23C

Abstract:
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, andthe rest water,in one liter of the pretreatment composition, wherein the pH of the composition is adjusted to 2 to 12.