| abstract |
A composition for the surface treatment of a galvanized steel plate to improve the property of preventing rust formation and adhesion, comprising colloidal particles of niobium oxide and an aqueous-based resin, in which the colloidal particles of oxide of Niobium are obtained from a niobium oxide sol which is stabilized by containing citric acid or salts thereof in an amount of 0.02 to 1.0 in a molar ratio with respect to Nb, in which the aqueous-based resin is at least one class selected from the group consisting of acrylic resin, polyolefin resin, polyurethane resin, olefin-acrylic acid copolymer resin, phenolic resin, polyester resin, alkyd resin, melamine resin, polycarbonate resin, polyacrylic acid and copolymers or polymers block them. |