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Metal surface treating agent

A metal surface treatment and surfactant technology, which is applied in the field of phosphorus-free metal surface treatment agents, can solve the problems that the salt spray test of workpieces cannot meet the standards, the frequency of bath solution renewal is high, and the service life of bath solution is short, so as to achieve enhanced friction coefficient, Effects of shorter processing time and lower film-forming temperature

Inactive Publication Date: 2011-05-11
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most zirconium-based treatment agents have strict requirements on the material and water quality of the workpiece, and there is rust phenomenon in the treatment of some cold-rolled plates, which makes the salt spray test of the workpiece fail to meet the standard, and the service life of the bath is short, making the bath The update frequency is high, resulting in an increase in process cost, so its popularization and application are limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 OP-10 (its main component is alkylphenol polyoxyethylene ether, manufacturer is a kind of metal surface treatment agent of Lvshun Chemical Plant, comprises following component by weight percentage:

[0047] Sodium silicate 1%

[0048] Chitosan 0.7%

[0049] Herotropine 0

[0050] OP-10 0.05%

[0051] Catechol 0.002%

[0052] PM-WET100 0.0001%

[0053] Lauryl alcohol ester 0.001%

[0054] Ethanol 3%

[0055] water balance

[0056] Nano-titanium dioxide and zirconia equivalent to 3% of its mass are evenly mixed in the sodium silicate; the N-deacetylation degree of the chitosan is 70%, and the average molecular weight is 1.3×10 6 ; Adjust the pH value of the above composition to 5.0 with citric acid;

[0057] The OP-10 is produced by Lushun Chemical Factory, and its main component is alkylphenol polyoxyethylene ether.

[0058] Soak the steel plate of the test piece in the above metal surface treatment agent for 1min to 3min, and dry it at a temperatur...

Embodiment 2

[0061] Repeat Example 1 by the content of each component specified in Table 1, but in the sodium silicate, uniformly mixed nanometer zirconia and zirconium fluoride equivalent to its mass 8%; the N-deacetylation of chitosan The degree is 75%, the average molecular weight is 1.3×10 6 .

[0062] The experimental results are shown in Table 2.

Embodiment 3

[0064] Repeat embodiment 1 by each component content specified in table 1, be equivalent to its quality 10% nano titanium dioxide and zirconia in the described sodium silicate; The N-deacetylation degree of described chitosan is 80 %, average molecular weight 1.2×10 6 .

[0065] The experimental results are shown in Table 2.

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Abstract

The invention relates to a metal surface treating agent which comprises the following components: silicate or metasilicate, chitosan, corrosion inhibitor, surfactant, antioxidant, wetting agent, film-forming additive, ethanol and water, wherein one or more of nanosized titanium dioxide, zirconium oxide or zirconium fluoride are evenly mixed with silicate or metasilicate and account for 3wt%-25wt% of silicate or metasilicate; the particle size of nanosized titanium dioxide, zirconium oxide or zirconium fluoride is less than 100nm; the degree of deacetylation of chitosan is 55%-100%; and the pH value of the composite is adjusted to 5.0-9.0. The invention provides the metal surface treating agent which uses environmentally friendly aqueous solution to form a metal chemical conversion film so as to inhibit the surface corrosion of metal; when the metal surface treating agent is used to treat the surface of the cold-rolled steel plate product, the rust-proof effect is especially good; and the metal surface treating agent can not cause environmental pollution and be green and environmentally friendly.

Description

technical field [0001] The invention relates to a phosphorus-free metal surface treatment agent, which can replace the commonly used phosphating solution metal surface treatment agent to treat metal products such as cold-rolled plates. Compared with the phosphating solution, the invention has more excellent Excellent adhesion, energy saving and environmental protection performance. Background technique [0002] Traditionally, most conversion coating treatment solutions contain chromate or phosphate, although satisfactory results can be obtained, but with the increasing awareness of environmental protection and the continuous maturity of the application of conversion coating technology in the world, the traditional industrial technology Will be gradually replaced by environmentally friendly conversion film technology. [0003] Coating is an anti-corrosion method widely used in metal surface treatment. Pre-painting treatment is an essential pre-painting process. Its function...

Claims

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Application Information

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IPC IPC(8): C23C22/50
Inventor 曲丰作徐同宽于长顺黄珊珊崔励
Owner DALIAN POLYTECHNIC UNIVERSITY
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