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Composition for metallic surface treatment and metallic base material with surface treatment envelope

A technology of metal surface treatment and composition, applied in the direction of metal material coating process, etc., can solve the problems of poor corrosion resistance, dissolution, insufficient adhesion, etc., and achieve excellent corrosion resistance, excellent storage, and adhesion excellent effect

Inactive Publication Date: 2011-06-08
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in recent years, the toxicity of chromium is becoming a social problem
The surface treatment method using chromate has the following problems: the problem of chromate fume scattering during the treatment process, the cost of wastewater treatment facilities, and the problem caused by the dissolution of chromic acid from the chemical conversion treatment film. Wait
However, these treatment agents have problems in that the stability of the treatment agent is insufficient, and the corrosion resistance of metal substrates such as zinc steel sheets is inferior to that of conventional chromate treatments.
[0009] However, although the above-mentioned composition has excellent storage stability and can form a surface-treated coating film excellent in corrosion resistance, its adhesion to the coating film formed by the subsequent coating process may be inconsistent depending on the type of coating material. Sufficient situation

Method used

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  • Composition for metallic surface treatment and metallic base material with surface treatment envelope
  • Composition for metallic surface treatment and metallic base material with surface treatment envelope
  • Composition for metallic surface treatment and metallic base material with surface treatment envelope

Examples

Experimental program
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Embodiment

[0121] Hereinafter, the present invention will be described in more detail with reference to examples. In addition, "part" and "%" represent "part by mass" and "% by mass", respectively.

[0122]

[0123] [Titanium-containing aqueous solution (A 1 ) preparation]

preparation example D-1

[0125] In a mixture of 10 parts of 30% hydrogen peroxide water and 100 parts of deionized water, a mixture of 10 parts of titanium tetraisopropoxide and 10 parts of isopropanol was added dropwise while stirring at 20° C. for 1 hour. Then, it was aged at 25°C for 2 hours to obtain a transparent, slightly yellowish, and slightly viscous aqueous solution of peroxotitanic acid (a 1 ) Titanium-containing aqueous solution (A 1 -1). Aqueous solution containing titanium (A 1 Converted TiO in -1) 2 The concentration is 2%.

preparation example D-2

[0127] Except using an equivalent amount of tetra-n-butoxytitanium instead of tetraisopropoxytitanium, operate in the same way as Preparation Example D-1 to obtain a titanium-containing aqueous solution (A 1 -2). Aqueous solution containing titanium (A 1 Converted TiO in -2) 2 The concentration is 2%.

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Abstract

The invention provides a composition for metallic surface treatment which is characterized by comprising following components (A) to (C): (A) an aqueous solution obtained by mixing at least one titanium compound selecting from water weakened titanium compound, the condensate of water weakened titanium compound, titanium hydroxide and the condensate of titanium hydroxide with hydrogen peroxide solution(A2), or vanadate peroxide solution (A2); (B) organic phosphate compound; and (C) condensation product of amino silane (c1) and multi-silyl-functional silanes (c2). The composition for metallic surface treatment can form surface treatment envelope which is excellent for storage and has excellent corrosion resistance performance. The adhesive property of a film subjected to a post coating process is good.

Description

Technical field [0001] The present invention relates to a metal surface treatment composition and a metal substrate having a surface treatment film. Background technique [0002] In the past, in order to improve the corrosion resistance of metal surfaces, chromate treatment and phosphate treatment were generally performed as surface treatments. However, in recent years, the toxicity of chromium is becoming a social problem. The surface treatment method using chromate has the following problems: the problem of chromate fume scattering during the treatment process, the high cost of drainage treatment equipment, and the problem caused by the dissolution of chromic acid from the chemical conversion treatment film wait. In addition, hexavalent chromium compounds have been designated as carcinogens for the human body by multiple official organizations including IARC (International Agency for Research on Cancer Review) and are extremely harmful substances. [0003] In addition, ...

Claims

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Application Information

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IPC IPC(8): C23C22/07C23C22/42
CPCC23C22/42C23C2222/20
Inventor 永井彰典芦田康成山本真人
Owner KANSAI PAINT CO LTD
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