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Steel surface treatment liquid

A steel surface and treatment liquid technology, applied in the direction of metal material coating process, etc., can solve the problems of human health and environmental ecological damage and impact, achieve significant environmental and social benefits, simple process, and improve the effect of sulfur spot resistance

Inactive Publication Date: 2015-02-18
WUXI EPIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the passivation solution disclosed in the above-mentioned patent, after the surface of the steel or galvanized layer is treated with the above-mentioned passivation solution, its surface anticorrosion performance is greatly improved, but the heavy metal ions and hexavalent chromium contained in the passivation solution are harmful to human health and Serious damage and impact on the environment and ecology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A steel surface treatment liquid, comprising the following components:

[0032] The mass concentration of titanium salt is 0.1%;

[0033] The mass concentration of vanadium compound is 2%;

[0034] The mass concentration of fluoride is 5%;

[0035] The mass concentration of water-soluble resin is 1%;

[0036] Acids used to adjust the pH of the surface treatment solution to 3;

[0037] The mass concentration of manganese dihydrogen phosphate is 5%;

[0038] Metal compounds of manganese with a mass concentration of 0.1;

[0039] The balance is water and other unavoidable impurities.

[0040] The vanadium compound mentioned above is ammonium polyvanadate; the titanium salt is titanium chloride; the water-soluble resin is a cationic acrylate copolymer, and the fluoride is sodium fluoride.

Embodiment 2

[0042] A steel surface treatment liquid, comprising the following components:

[0043] The mass concentration of titanium salt is 0.5%;

[0044] The mass concentration of vanadium compound is 5%;

[0045] The mass concentration of fluoride is 10%;

[0046] The mass concentration of water-soluble resin is 1.2%;

[0047] Acid used to adjust the pH of the surface treatment solution to 3.5;

[0048] The mass concentration of manganese dihydrogen phosphate is 10%;

[0049] Manganese metal compounds, the mass concentration is 1.0%;

[0050] The balance is water and other unavoidable impurities.

[0051]The vanadium compound mentioned above is vanadyl dichloride solution; the titanium salt is titanium sulfate; the water-soluble resin is cationic styrene-acrylic emulsion polymer, and the fluoride is sodium fluoride.

Embodiment 3

[0053] A steel surface treatment liquid, comprising the following components:

[0054] The mass concentration of titanium salt is 1.0%;

[0055] The mass concentration of vanadium compound is 10%;

[0056] The mass concentration of fluoride is 15%;

[0057] The mass concentration of water-soluble resin is 1.5%;

[0058] Acid used to adjust the pH of the passivation solution to 3.5;

[0059] The mass concentration of manganese dihydrogen phosphate is 20%;

[0060] Manganese metal compounds, the mass concentration is 1.5%;

[0061] The balance is water and other unavoidable impurities.

[0062] The vanadium compound mentioned above is a vanadium sulfate solution; the titanium salt is sodium titanate; the water-soluble resin is a cationic epoxy acrylic acid copolymer, and the fluoride is sodium fluoride.

[0063] In the present invention, when the above-mentioned chromium-free passivation solution is used to passivate the steel plate, a cathodic electrolytic passivation met...

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PUM

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Abstract

The invention discloses a steel surface treatment liquid comprising titanium salt with the mass concentration of 0.1-1.5%, vanadium compound with the mass concentration of 2-15%, fluoride with the mass concentration of 5-20%, water soluble resin with the mass concentration of 1-2%, acid used for adjusting the pH value of a passive solution to be 3-4, phosphorus compound with the mass concentration of 5-25%, molybdenum, zirconium, manganese or tungsten metallic compound or the combination thereof with the mass concentration of 0.1-1.5%, and water and other inevitable impurities. The surface treatment process has the advantages of simple method, easy implementation and low cost. Only a small number of auxiliary instruments or equipment are required to completely perform the chrome free surface treatment on the traditional chrome treatment production line of steel plates, thereby simplifying wastewater treatment, lowering cost and achieving remarkable economic benefits.

Description

technical field [0001] The invention relates to steel surface treatment technology, in particular to a steel surface treatment liquid. Background technique [0002] Iron and steel accounts for more than 90% of the use of metal materials. It is the most widely used metal in daily life, but it is the most easily corroded metal. Nearly 30% of the steel products produced in the world every year are corroded to varying degrees, and about 10% of them are corroded. Steel products will be scrapped. The annual economic loss caused by corrosion in the world is about 700 billion US dollars, accounting for about 2%-4% of the national economic output value of various countries. The performance of steel equipment is also reduced due to corrosion, which seriously threatens production safety and greatly reduces production efficiency. [0003] There are many anti-corrosion treatment technologies for steel, but phosphating treatment and chromate passivation treatment are the two most commonl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44
CPCC23C22/44C23C22/361C23C22/364
Inventor 尤为
Owner WUXI EPIC TECH
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