Surface treatment of aquo-metal containing no sexavalence chromium and its treated metal plate for surface treatment

A technology of metal surface treatment and water system, which is applied in the direction of metal material coating process, etc., can solve the problems of poor conductivity and so on

Inactive Publication Date: 2002-03-20
NIHON PARKERIZING
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Problems solved by technology

Since this method uses water-dispersible resin and/or water-soluble resin as the ma

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Embodiment Construction

[0012] The water-based metal surface treatment agent of the present invention contains component (A) trivalent chromium compound, but does not contain hexavalent chromium compound, and the trivalent chromium compound is not particularly limited, chromium (III) sulfate, chromium (III) nitrate, diphosphoric acid Chromium (III), chromium (III) fluoride, chromium (III) halide, etc. are all available, and even trivalent chromium that has been completely reduced from hexavalent chromium is used without hindrance. The compounding quantity of the component (A) in the aqueous metal surface treatment agent of this invention is not specifically limited.

[0013] Although the metal in the component (B) metal nitrate salt used in the present invention is not particularly limited, at least one selected from the group consisting of alkaline earth metals such as magnesium, calcium, and barium, and cobalt, nickel, iron, zirconium, and titanium One kind of metal is more suitable; the compoundin...

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Abstract

Provided is an aqueous agent for metal surface treatment without including hexa-valent chromium which form a superior film in corrosion resistance, electroconductivity and fingerprint resistance on a surface of a metal material and to provide a metal plate treated with the treatment agent. The aqueous agent for metal surface treatment without including hexa-valent chromium comprises (A) a trivalent chromium compound, (B) a metal nitrate (C) water-dispersible silica and water, and besides, comprises that the weight ratio of a metal in the component (A) to a metal in the component (B) is in the range of 5/95-95/5. The aqueous agent preferably includes aqueous resins such as an acryl resin, a urthane resin and an epoxy resin, phosphate compounds, and lubricants as additional components. Water class resin such as acryl resin, urethane resin and epoxy resin, phosphate compounds and a lubricant are preferably included as additional components. A film of 0.1-5 g/m2 by dry coating weight is formed by means of applying the above aqueous agent for metal surface treatment on at least one side of the surface of the metal and drying it.

Description

technical field [0001] The invention relates to a water-based metal surface treatment agent, in particular to a water-based metal surface treatment agent that does not contain hexavalent chromium, which can form a film with excellent corrosion resistance, conductivity and fingerprint resistance on the surface of metal materials. The present invention also relates to a surface-treated metal sheet treated with the treating agent. Background technique [0002] Generally known steel sheets for household electrical appliances and steel sheets for building materials all do chromate treatment on the lead-based gold-plated steel sheets to improve their corrosion resistance. However, this type of chromate treatment contains hexavalent chromium, which is harmful to the environment and the human body. Therefore, in recent years, there has been a demand for synthetic treatment without hexavalent chromium, and even more so, for synthetic treatment without chromium. Expectations are stro...

Claims

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Application Information

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IPC IPC(8): C23C22/48C23C22/06C23C22/08C23C22/53
CPCC23C22/53C23C2222/10
Inventor 木下康弘小崎匠
Owner NIHON PARKERIZING
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