Metallic material having chromate-free-treated surface excellent in corrosion resistance, heat resistance, anti-fingerprint property, conductivity, coating property and black deposit resistance during

Abstract

The present invention provides a metal material with a non-chromate surface treatment, which can satisfy the corrosion resistance, heat resistance, fingerprint resistance, electrical conductivity, paintability and processing requirements that were difficult to achieve with the conventional non-chromate technology. Anti-blackening and other properties. The non-chromate surface-treated metal material of the present invention forms a composite film containing various components by applying and drying a water-based metal surface treatment agent on the surface of the metal material. The water-based metal surface treatment agent contains one The organic silane coupling agent (A) of amino group and the silane coupling agent (B) containing 1 glycidyl group in the molecule are mixed according to the ratio of solid content mass ratio [(A) / (B)] of 0.5 to 1.7. A silicon compound (W), at least one fluorine compound (X) selected from titanium hydrofluoride or zirconium hydrofluoride, phosphoric acid (Y) and a vanadium compound (Z).

Description

Technical field [0001] The present invention relates to a metal material with a non-chromate surface treatment that is excellent in corrosion resistance, heat resistance, fingerprint resistance, conductivity, coating properties, and black deposition resistance during processing. Background technique [0002] As a technique that generally has excellent adhesion to the surface of metal materials, and imparts corrosion resistance or fingerprint resistance to the surface of metal materials, the following method is known: using chromic acid, dichromic acid, or their salts as the main component The method of chromate treatment of the metal material surface, the method of phosphate treatment, the method of treatment with silane coupling agent monomer, the method of organic resin film treatment, etc., have been put into practical use. [0003] As a technique that mainly uses inorganic components, JP 2002-30460 A lists metals containing vanadium compounds and metal compounds containing at...

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Problems solved by technology

[0006] However, the above-mentioned technologies cannot satisfy all properties such as corrosion resistance, heat resistance, fingerprint resistance, electrical conductivity, and blackening resistance during processing, and there are still problems in practical application.

[0007] Therefore, the current situation is that no surface treatment agent that can replace the chromate film can be obtained in any method, so the development of a surface treatment agent and a treatment method that can comprehensively satisfy the above-mentioned properties is strongly demanded.