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Organic and inorganic composite aqueous surface treatment liquid for color coating pretreatment of galvanized sheet

A surface treatment liquid and composite water-based technology, which is applied to the surface coating liquid device, coating, metal material coating process, etc., to achieve the effect of improving corrosion resistance, simplifying the color coating process, and simple process

Active Publication Date: 2013-09-04
马鞍山市安工大智能装备技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of using chromium-containing treatment liquid in the existing color coating pretreatment technology, and provide an organic-inorganic composite water-based surface treatment liquid for pre-treatment of galvanized sheet color coating. The organic-inorganic composite water-based surface treatment The liquid is compounded with non-toxic water-based polyurethane, organic silane and inorganic salts, acting on the surface of the galvanized sheet to form a protective film with excellent corrosion resistance and adhesion

Method used

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  • Organic and inorganic composite aqueous surface treatment liquid for color coating pretreatment of galvanized sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: Use water-based polyurethane with an effective content of 150g (solid content is 25wt%), 12.5g organosilane, 2g inorganic passivator, 1g inorganic corrosion inhibitor and the rest of the water and inorganic acid to prepare a pH value of 3 ~4 of 1000g treatment solution. Among them, organosilane is prepared from γ-glycidyl etheroxypropyltrimethoxysilane and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane according to the mass ratio of effective content of 4:1. to make. The inorganic passivation agent is zirconium sulfate and cobalt sulfate, prepared according to the mass ratio of effective content of 1:1, and the inorganic acid is nitric acid.

[0028] The implementation process is simple, and the prepared passivation solution has good stability. In an aqueous solution of 5% NaCl, the corrosion potential Ecorr obtained by electrochemical testing is -1.0390V, and the polarization resistance is 0.405 kΩ / cm 2 , the corrosion current is 128.8A / cm 2 . The area o...

Embodiment 2

[0029] Embodiment 2: use the water-based polyurethane (solid content is 25wt%) that effective content is 300g, 25g organosilane, 0.75g inorganic passivation agent, 0.5g inorganic corrosion inhibitor and the water of remainder and inorganic acid to prepare pH value 1000g treatment solution for 3~4. Among them, organosilane is prepared from γ-glycidyl etheroxypropyltrimethoxysilane and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane according to the mass ratio of effective content of 3:1. to make. The inorganic passivation agent is zirconium sulfate and cobalt sulfate, prepared according to the mass ratio of the effective content of 1:2, and the inorganic acid is nitric acid.

[0030] The implementation process is simple, and the prepared passivation solution has good stability. In an aqueous solution of 5% NaCl, the corrosion potential Ecorr obtained by electrochemical testing is -0.6283V, and the polarization resistance is 112.9 kΩ / cm 2 , the corrosion current is 0.4279A / cm ...

Embodiment 3

[0031] Embodiment 3: use the water-based polyurethane (solid content is 25wt%) that effective content is 300g, 25g organosilane, 0.75g inorganic passivation agent, 0.75g inorganic corrosion inhibitor and the water of remainder and inorganic acid to prepare pH value 1000g treatment solution for 3~4. Among them, organosilane is prepared from γ-glycidyl etheroxypropyltrimethoxysilane and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane according to the mass ratio of effective content of 7:1. to make. The inorganic passivation agent is zirconium sulfate and cobalt sulfate, prepared according to the mass ratio of the effective content of 2:1, and the inorganic acid is sulfuric acid.

[0032] The implementation process is simple, and the prepared passivation solution has good stability. In an aqueous solution of 5% NaCl, the corrosion potential Ecorr obtained by electrochemical testing is -1.0365V, and the polarization resistance is 0.291 kΩ / cm 2 , the corrosion current is 130A / cm ...

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Abstract

The invention discloses an organic and inorganic composite aqueous surface treatment liquid for color coating pretreatment of a galvanized sheet, belonging to the technical field of metal material surface treatment. The aqueous surface treatment liquid comprises the following components in percentage by mass: 15-45 percent of aqueous organic resin, 1.25-3.75 percent of organic silane, 0.075-0.2 percent of inorganic passivator, 0.05-0.1 percent of inorganic corrosion inhibitor, a proper amount of pH adjusting agent and the balance of solvent water. Aqueous polyurethane, the organic silane, theinorganic passivator and the inorganic corrosion inhibitor are organically combined to form an organic and inorganic composite protection film by using the organic and inorganic composite aqueous surface treatment liquid. Due to the introduction of the organic silane, not only the corrosion resistance of the protection film but also the adhesion between the protection film and a galvanized layer can be improved. The organic and inorganic composite aqueous surface treatment liquid does not contain chromium in any valence state and is an environment-friendly chromium-free passivation liquid.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal materials, and in particular relates to a water-based chromium-free color coating surface treatment liquid which can effectively improve the corrosion resistance and coating performance of galvanized sheets. technical background [0002] Color-coated plate is a new type of plate deep-processing material combined with metallurgy and chemical industry. It not only has the mechanical strength and easy forming of metal, but also has the decoration and corrosion resistance of organic coating film. As a corrosion-resistant and beautiful material, galvanized color-coated sheet is widely used in the construction industry, home appliance industry, automobile industry and transportation industry. The organic coating film on the surface of the color-coated sheet plays the role of physical and chemical coverage and isolation, which can prevent the steel plate from rusting and has a longer s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/40C23C22/42B05D7/16
Inventor 张千峰叶鹏飞陈均胡丰徐丽萍
Owner 马鞍山市安工大智能装备技术研究院有限公司
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