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Surface treating agent with excellent alkali resistance and solvent resistance and for zinc coated steel plate

A surface treatment agent and solvent resistance technology, which is applied in the direction of pretreatment surface, surface coating liquid device, metal material coating process, etc., can solve problems such as peeling off, protective film discoloration, etc., and achieve excellent alkali resistance, Simplified processing steps and excellent corrosion resistance

Active Publication Date: 2007-01-03
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Examples: The implementation of Examples 1 to 9 of the present invention and Comparative Examples 1 to 6 are as follows:

[0036] The following examples use electro-galvanized, hot-dip galvanized, and hot-dip galvanized aluminum alloy steel sheets, but the scope of the present invention is not limited by these specific examples. The galvanized steel sheets used in the examples and comparative examples, the surface cleaning methods, surface treatment agents, and performance testing will be described below.

[0037] 1. Test model

[0038] (a) Products sold in the market, thickness 0.6mm, double-sided electro-galvanized steel (EG), coating adhesion 20g / m 2

[0039] (b) Marketed product, thickness 0.6mm, hot-dip galvanized steel (GI), coating adhesion 40g / m 2

[0040] (c) Products sold on the market, with a thickness of 0.6mm, hot-dip galvanized aluminum alloy steel (GF), with a coating adhesion of 40g / m 2

[0041] 2. Cleaning method of galvanized steel sheet

[0042] The su...

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PUM

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Abstract

The present invention relates to surface treating agent for zinc coated steel plate, and is especially one kind of surface treating agent with excellent alkali resistance and solvent resistance for zinc coated steel plate. The surface treating agent is water solution, which consists of fluoric acid with 4 or more fluorine atoms and at least one of Ti, Zr and Si atome in 0.1-5.0 wt%; phsosphorus containing compounding 0.01-0.5 wt%; one or more organic silicon coupling agent with amino group containing at least one active hydrogen atom 10-20 wt%, one or more organic silane coupling agent with at least one epoxy group 25-50 wt%; at least one kind of cationic or non-ionic water soluble polyurethane resin 30-60 wt% and vanadium compound 0.1-1.0 wt%. It is used in forming protecting film with excellent performance on the surface of zinc coated steel plate.

Description

Technical field [0001] The invention relates to a surface treatment agent for galvanized steel sheet. The surface treatment agent can form a protective film on the surface of the galvanized steel sheet. The protective film imparts excellent alkali resistance and solvent resistance to the surface of the galvanized steel sheet. Form good corrosion resistance, fingerprint resistance, coating adhesion and other properties. Background technique [0002] Galvanized steel sheets are widely used in various fields such as automobiles, building materials, and home appliances. However, these metal materials are easily corroded in the atmosphere because they contain zinc and aluminum, and white rust is formed. This phenomenon not only affects the appearance of the galvanized steel sheet, but also adversely affects the coating adhesion. In order to improve the corrosion resistance and coating adhesion, the galvanized surface is usually passivated. At present, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/10C23C22/06C09D5/08
CPCC23C2222/20
Inventor 倪富荣中村充袁江南森田良治
Owner BAOSHAN IRON & STEEL CO LTD
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