Galvanized steel plate with excellent machining property and alkali and solvent resistance and surface treating agent

A galvanized steel sheet, solvent resistance technology, applied in the direction of metal material coating process, etc., can solve problems such as peeling off and discoloration of protective film

Active Publication Date: 2010-07-28
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the protective film on the surface of the steel plate will change color or even fall off.

Method used

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  • Galvanized steel plate with excellent machining property and alkali and solvent resistance and surface treating agent
  • Galvanized steel plate with excellent machining property and alkali and solvent resistance and surface treating agent

Examples

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Embodiment

[0037] Embodiment: Embodiment 1-12 of the present invention, comparative example 1-12 implementation situation is as follows:

[0038] The present invention is specifically described based on the following examples. However, the scope of the present invention is not limited by these examples. In the following examples and comparative examples, the galvanized materials used, the surface cleaning method, and the surface treatment agent are described below.

[0039] 1. Test sample

[0040] (a) Products sold in the market, plate thickness 0.6mm, double-sided electrogalvanized steel plate (EG), coating adhesion amount 20g / m 2 ;

[0041] (b) Products sold in the market, plate thickness 0.6mm, hot-dip galvanized steel plate (GI), coating adhesion amount 40g / m 2 .

[0042] 2. Cleaning method of metal plate

[0043] The surface of the above-mentioned galvanized steel sheet was washed with an aqueous solution (20 g / L) of a medium-alkalinity degreasing agent (registered trademark: ...

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Abstract

The invention discloses a galvanized steel plate with excellent machining property and alkali and solvent resistance. An organic compound protective film is covered on the surface of the steel plate, wherein the protective film contains the following components in percentage by weight: A) 50 to 70 percent of cationic polyurethane resin of which the elongation percentage is 20 to 100 percent and the glass transition temperature is between 50 and 100 DEG C; B) 5 to 10 percent of oxidized polyethylene particles with the grain diameter (median diameter) of 1 to 2 microns; C) one or more organic silicone coupling agents (Ca) containing at least one active hydrogen of amino functional group and one or more organic silicone coupling agents (Cb) containing at least one epoxy functional group in a weight ratio of the (Ca) to the (Cb) of 0.2 to 0.4, wherein the weight ratio of the total amount of the cationic polyurethane resin (A) to the organic silicone coupling agent is 2 to 3; D) 0.01 to 0.1 percent of ammonium molybdate based on molybdenum element; E) 0.1 to 1.0 percent of vanadium compound based on vanadium element; F) 0.1 to 5 percent of fluorine-containing titanium compound based on titanium element; and G) 0.01 to 0.5 percent of phosphorous compound based on phosphorous element.

Description

technical field [0001] The present invention belongs to the technical field of surface treatment of metal materials, and relates to a surface treatment agent used for surface treatment of galvanized steel sheets. After being treated with the surface treatment agent, an organic composite protective film can be formed on the surface of galvanized steel sheets. The protective film not only imparts excellent stamping formability, solvent resistance and alkali resistance to the surface of the galvanized steel sheet, but also enables the galvanized steel sheet to have good properties such as corrosion resistance and coating adhesion. Background technique [0002] Galvanized steel sheets are widely used in various fields such as automobiles, building materials, and home appliances. However, since these metal materials contain components such as zinc, they are easily corroded in the atmospheric environment and form white rust. This phenomenon not only affects the appearance of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44
Inventor 倪富荣中村充吴志良袁江南森田良治孙宁锋
Owner BAOSHAN IRON & STEEL CO LTD
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