A surface treatment agent capable of forming a hexavalent chromium-free chemical conversion coating that can provide an excellent corrosion-resistant coating on various metallic materials; a metallic material having a surface treatment coating obtained therefrom; and a method of producing the same. A free fluorine ion-containing surface treatment agent for surface-treating a metallic material, which is obtained by mixing at least one supply source (A) of trivalent chromium-containing ions A; a supply source (B) of ions B that are at least one selected from titanium-containing ions and zirconium-containing ions; a water-soluble or water-dispersible compound (C) containing an alkoxysilyl group, an aromatic ring, a hydroxy group directly bonded to the aromatic ring, and at least one of primary, secondary, tertiary and quaternary amino groups, wherein the alkoxysilyl group is bonded to the nitrogen atom of the amino group directly or via an alkylene group; and a fluorine-containing compound (D) providing fluorine-containing ions.

A surface treatment agent capable of forming a hexavalent chromium-free chemical conversion coating that can provide an excellent corrosion-resistant coating on various metallic materials; a metallic material having a surface treatment coating obtained therefrom; and a method of producing the same. A free fluorine ion-containing surface treatment agent for surface-treating a metallic material, which is obtained by mixing at least one supply source (A) of trivalent chromium-containing ions A; a supply source (B) of ions B that are at least one selected from titanium-containing ions and zirconium-containing ions; a water-soluble or water-dispersible compound (C) containing an alkoxysilyl group, an aromatic ring, a hydroxy group directly bonded to the aromatic ring, and at least one of primary, secondary, tertiary and quaternary amino groups, wherein the alkoxysilyl group is bonded to the nitrogen atom of the amino group directly or via an alkylene group; and a fluorine-containing compound (D) providing fluorine-containing ions.

Provided is a surface treatment solution composition comprising: 30 to 51 wt % of a trivalent chromium compound comprising chromium phosphate (A) and chromium nitrate (B) and having a content ratio of A/(A+B) that satisfies 0.3 to 0.6; 5 to 15 wt % of silane coupling agent; 0.2 to 3 wt % of vanadium-based anti-corrosive rust inhibitor; 3 to 12 wt % of colloidal silica; 0.5 to 5 wt % of polysiloxane copolymer; and 14 to 61.3 wt % of water, a hot dip galvanized steel sheet surface-treated using same, and a manufacturing method thereof. The hot dip galvanized steel sheet treated with the surface treatment solution composition containing trivalent chromium has an excellent corrosion resistance, blackening resistance, pipe-forming oil reactivity, and alkali resistance.

A color coating layer is formed on the surface of a stainless steel plate by a chemical coloring method or an electrolytic coloring method. Thereafter, a colored stainless steel plate having the color coating layer is cold-rolled, the thickness of the color coating layer is adjusted to between 0.05 μm and 1.0 μm, and an entire plate thickness is adjusted to 0.5 mm or less. By the cold rolling a Vickers hardness Hv is between 250 and 550 to form a deformed band. As surface roughness, an arithmetic average roughness Ra is adjusted to between 0.05 μm and 5.0 μm. In this manner, the strength and rigidity of a thin colored stainless steel plate can be secured, and a color stainless steel plate and a colored stainless steel coil which do not easily cause galling and are excellent in press moldability can be obtained.

A color coating layer is formed on the surface of a stainless steel plate by a chemical coloring method or an electrolytic coloring method. Thereafter, a colored stainless steel plate having the color coating layer is cold-rolled, the thickness of the color coating layer is adjusted to between 0.05 μm and 1.0 μm, and an entire plate thickness is adjusted to 0.5 mm or less. By the cold rolling a Vickers hardness Hv is between 250 and 550 to form a deformed band. As surface roughness, an arithmetic average roughness Ra is adjusted to between 0.05 μm and 5.0 μm. In this manner, the strength and rigidity of a thin colored stainless steel plate can be secured, and a color stainless steel plate and a colored stainless steel coil which do not easily cause galling and are excellent in press moldability can be obtained.

A multi-step method for anti-corrosion pretreatment of components made from metallic materials, in which a wet chemical treatment with an aqueous composition (A) containing a dissolved and/or dispersed polymer P, which is substituted with heterocycles containing at least one quaternary nitrogen heteroatom, is followed by a conversion treatment based on water-soluble compounds of the elements Zr, Ti, and/or Si before further anti-corrosion coatings are optionally applied.

A multi-step method for anti-corrosion pretreatment of components made from metallic materials, in which a wet chemical treatment with an aqueous composition (A) containing a dissolved and/or dispersed polymer P, which is substituted with heterocycles containing at least one quaternary nitrogen heteroatom, is followed by a conversion treatment based on water-soluble compounds of the elements Zr, Ti, and/or Si before further anti-corrosion coatings are optionally applied.

A method is provided for passivating an aluminum surface. According to the method, the aluminum surface is provided with a flux. A passivation solution is subsequently applied to the aluminum surface, such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux.

A method is provided for passivating an aluminum surface. According to the method, the aluminum surface is provided with a flux. A passivation solution is subsequently applied to the aluminum surface, such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux.

A surface treatment agent capable of forming a hexavalent chromium-free chemical conversion coating that can provide an excellent corrosion-resistant coating on various metallic materials; a metallic material having a surface treatment coating obtained therefrom; and a method of producing the same. A free fluorine ion-containing surface treatment agent for surface-treating a metallic material, which is obtained by mixing at least one supply source (A) of trivalent chromium-containing ions A; a supply source (B) of ions B that are at least one selected from titanium-containing ions and zirconium-containing ions; a water-soluble or water-dispersible compound (C) containing an alkoxysilyl group, an aromatic ring, a hydroxy group directly bonded to the aromatic ring, and at least one of primary, secondary, tertiary and quaternary amino groups, wherein the alkoxysilyl group is bonded to the nitrogen atom of the amino group directly or via an alkylene group; and a fluorine-containing compound (D) providing fluorine-containing ions.