Abstract: Objects of the present invention is to provide a zinc-based alloy electroplated film having a high corrosion resistance comparable to Zn—Cr alloy plating without containing chromium which gives a heavy environmental load, and a plated metal material using the same. The present invention relates to a zinc-based alloy electroplated film excellent in corrosion resistance containing (A) 30 to 96% by weight of zinc, (B) 2 to 20% by weight of an iron-group metal, and (C) 2 to 50% by weight of tungsten.

Abstract: An object of the invention is to provide an electroplating solution composition capable of obtaining a plated film excellent in adhesiveness to a coated film and excellent in corrosion resistance without surface treatment. The present invention relates to an organic polymer composite zinc alloy electroplating solution composition containing: (A) 1 to 600 g/l of Zn ion, (B) 1 to 600 g/l of an iron-group-element ion, and (C) 0.1 to 200 g/l, in terms of W ion, of tungstic acid-based compound, and (D) 0.5 to 500 g/l of water-soluble or water-dispersible organic polymer compound having a number average molecular weight of 1,000 to 1,000,000.

Abstract: The present invention provides a coating composition for forming a titanium oxide film, comprising (A) a specific titanium-containing aqueous liquid and (B) at least one compound selected from the group consisting of organic acids and their salts. The present invention also provides a process for forming a titanium oxide film using the coating composition, and a metal substrate coated therewith.

Abstract: The present invention provides a coating composition for forming a titanium oxide film, comprising (A) a specific titanium-containing aqueous liquid and (B) at least one compound selected from the group consisting of organic acids and their salts. The present invention also provides a process for forming a titanium oxide film using the coating composition, and a metal substrate coated therewith.

Abstract: The present invention provides a coating composition for forming a titanium oxide film, comprising (A) a specific titanium-containing aqueous liquid and (B) at least one compound selected from the group consisting of organic acids and their salts. The present invention also provides a process for forming a titanium oxide film using the coating composition, and a metal substrate coated therewith.

Abstract: The present invention provides: a coating composition for forming a titanium oxide film, comprising (A) a titanium-containing aqueous liquid obtained by mixing at least one titanium compound selected from the group consisting of hydrolyzable titanium compounds, low condensates of hydrolyzable titanium compounds, titanium hydroxide and low condensates of titanium hydroxide with aqueous hydrogen peroxide, and (B) at least one halide selected from the group consisting of titanium halides, titanium halide salts, zirconium halides, zirconium halide salts, silicon halides and silicon halide salts; a process for forming a titanium oxide film, comprising applying the coating composition to a metal substrate and drying the resulting coat; and an undercoating material for metal substrates and a post-treating agent for phosphate undercoats on metal substrates, the material and agent being the above coating composition.

Abstract: The present invention provides: a coating composition for forming a titanium oxide film, comprising (A) a titanium-containing aqueous liquid obtained by mixing at least one titanium compound selected from the group consisting of hydrolyzable titanium compounds, low condensates of hydrolyzable titanium compounds, titanium hydroxide and low condensates of titanium hydroxide with aqueous hydrogen peroxide, and (B) at least one halide selected from the group consisting of titanium halides, titanium halide salts, zirconium halides, zirconium halide salts, silicon halides and silicon halide salts; a process for forming a titanium oxide film, comprising applying the coating composition to a metal substrate and drying the resulting coat; and an undercoating material for metal substrates and a post-treating agent for phosphate undercoats on metal substrates, the material and agent being the above coating composition.

Abstract: A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.

Abstract: This invention provides an organic composite coated steel sheet comprising, as the base, a zinc or zinc alloy coated steel sheet, which can be used in automobile bodies and electric appliances. The coated steel sheet has excellent press formability with oil, while having excellent perforation corrosion resistance and excellent corrosion resistance in a rust-contaminated environment. The coated steel sheet comprises a zinc or zinc alloy plated steel sheet having, on its surface, a chromate layer and an organic film formed in that order, in which the organic film has a thickness of from 0.1 to 3.0 .mu.

Abstract: The present invention provides a coating composition for hydrophilization comprising (A) a water-soluble or water-dispersible organic resin, (B) organic resin fine particles described below and (C) a crosslinking agent, and a method for hydrophilization of heat exchanger fins by coating said fins with the above composition. The organic resin fine particles (B) are fine particles having a weight-average particle diameter/number-average particle diameter ratio of 1.2 or less and an average primary particle diameter of 0.1-1.0 .mu.m, which are obtained by dispersion-polymerizing 100 parts by weight of a monomer mixture consisting of 0.1-10.0% by weight of (a) at least one monomer selected from a polyoxyalkylene chain-containing (meth)acrylate and a (meth)acrylamide, 15.0-45.0% by weight of (b) divinylbenzene, 45.0-84.9% by weight of (c) styrene and 0-39.9% by weight of (d) (meth)acrylic acid, in the presence of 40 parts by weight of a poly(meth)acrylic acid in a lower alcohol.

Abstract: An organic composite coated steel sheet having an excellent corrosion resistance in a rust-contaminated environment. The sheet contains a chromate film on a zinc or zinc alloy plated sheet and an organic resin film on the chromate film. The resin film has a thickness of 0.2-2.0 microns. The resin film contains (a) a base resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to the ends of molecules of an epoxy resin, (b) a polyfunctional polyisocyanate compound having at least six isocyanate groups per molecule, and (c) a rust-preventing additive of a sparingly soluble chromate or a mixture of silica and a sparingly soluble chromate.

Abstract: In a pigment dispersion comprising a pigment, a dispersing agent and an organic dispersing medium, the improvement wherein the dispersing agent is the reaction product of an amino resin, an alkyd resin or an acrylic resin with a silane coupling agent, or the reaction product of both an alkyd resin or an acrylic resin and an amino resin with a silane coupling agent.