Surface-treating composition, and surface-treated steel sheet

A technology of surface treatment and composition, which is applied in the field of surface treatment steel plates, can solve the problems of impossible surface treatment of steel plates and poor appearance, and achieve excellent adhesion, heat discoloration resistance, excellent scratch resistance, and scratch resistance excellent effect

Inactive Publication Date: 2014-12-17
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the surface-treated steel sheet of the above-mentioned prior art is applied to such an application, since the coating mainly consists of an organic resin, it will be discolored to yellow or brown due to thermal decomposition, resulting in poor appearance.
Therefore, it is almost impossible to apply the surface-treated steel sheet of the prior art

Method used

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  • Surface-treating composition, and surface-treated steel sheet
  • Surface-treating composition, and surface-treated steel sheet
  • Surface-treating composition, and surface-treated steel sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0139] The titanium-containing aqueous solution (A) and components (B) to (G) used in the surface treatment composition are shown below.

[0140][Manufacture of titanium-containing aqueous solution (A)]

manufacture example 1

[0141] Manufacturing example 1 (titanium-containing aqueous solution T1)

[0142] 5 ml of a 60% by mass titanium tetrachloride solution was adjusted to 500 ml with distilled water, and ammonia water (ammonia:water mass ratio: 1:9) was added dropwise to the resulting solution to precipitate low-condensation products of titanium hydroxide. After washing with distilled water, 10 ml of a 30% by mass hydrogen peroxide aqueous solution was added and stirred to obtain a titanium-containing yellow translucent, viscous titanium-containing aqueous solution T1.

manufacture example 2

[0143] Manufacturing example 2 (titanium-containing aqueous solution T2)

[0144] A mixture of 10 parts by mass of titanium tetraisopropoxide and 10 parts by mass of isopropanol was added dropwise to 10 parts by mass of a 30 mass % hydrogen peroxide aqueous solution and 100 parts by mass of in a mixture of deionized water. Then, it was aged at 25°C for 2 hours to obtain a transparent yellow, slightly viscous titanium-containing aqueous solution T2.

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Abstract

Disclosed is a surface-treating composition having excellent corrosion resistance, thermal discoloration resistance, blackening resistance, scratch resistance, post-processing adhesion to an organic resin layer that is formed thereon, and adhesion under high-temperature high-humidity environments. The surface-treating composition comprises (A) an aqueous titanium-containing solution produced by mixing at least one titanium compound selected from a hydrolysable titanium compound, a low-condensed product of a hydrolysable titanium compound, titanium hydroxide and a low-condensed product of titanium hydroxide with aqueous hydrogen peroxide, (B) a zirconium carbonate compound, (C) an organic phosphoric acid compound, (D) a metal phosphate salt, (E) silicon oxide, (F) a water-soluble organic resin and / or a water-dispersible organic resin, and (G) a silane coupling agent at a specified proportion.

Description

technical field [0001] The present invention relates to a surface treatment composition suitable for use in automobiles, home appliances, and building materials, and a surface-treated steel sheet, and to an environment-adaptive surface treatment composition that does not contain hexavalent chromium in the composition or film, and a surface using the surface treatment composition Handle steel plates. Background technique [0002] Conventionally, steel sheets for home appliances, steel sheets for building materials, and steel sheets for automobiles have been widely used. Steel sheets obtained by using chromic acid, dichromic acid, or The treatment solution containing salts as the main component performs chromate treatment on the surface of a galvanized steel sheet or an aluminized steel sheet. This chromate treatment is an economical treatment method that provides excellent corrosion resistance and can be performed relatively simply. [0003] Chromate treatment uses hexavale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/08B32B15/08C09D1/00C09D5/02C09D5/08C09D7/12C23C22/18C23C22/20
CPCB32B2605/08B32B2509/00C23C2222/20B32B15/08C09D5/084C23C22/68B32B2419/00
Inventor 金子里江藤林亘江漥田隆广中野多佳士阿久井润
Owner JFE STEEL CORP
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