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Metal surface treatment agent

A technology of metal surface treatment and silane coupling agent, applied in the field of phosphorus-free metal surface treatment agent, can solve problems such as excessive corrosion of plates, and achieve the effects of improving adhesion, improving weather resistance and reducing surface tension

Inactive Publication Date: 2012-11-21
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 workpiece materials and water quality, and excessive corrosion occurs in the treatment of some plates, and there is room for further improvement in performance indicators such as adhesion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A metal surface treatment agent comprises the following components by weight percentage:

[0044]

[0045] Nano-zirconium dioxide equivalent to 3% of its mass is uniformly mixed in the sodium silicate; the ionic liquid is a brominated 1-butyl-3-methylimidazole ionic liquid; The degree of acetylation is 70%, and the average molecular weight is 1.3×10 6 ; The main component of the OP-10 is alkylphenol polyoxyethylene ether. The pH of the above composition was adjusted to 5.0 with oxalic acid.

[0046] The metal test pieces to be processed are the 5082 aluminum plate of Zhongwang Aluminum, the Q235 cold-rolled steel plate of Anshan Iron and Steel Co., Ltd., and the SGCC electro-galvanized plate of Anshan Iron and Steel Co., Ltd.

[0047] After cleaning and drying the test piece, place it in the above-mentioned metal surface treatment agent and soak for 2 minutes; take it out, dry it with hot air, spray paint, and measure the coating performance. The experimental resu...

Embodiment 2

[0049] Repeat Example 1 according to the content of each component specified in Table 1, but the sodium silicate is uniformly mixed with nano-zirconia equivalent to 8% of its mass; the ionic liquid is tetrafluoroboric acid 1-butyl-3 -Methylimidazole ionic liquid; the N-deacetylation degree of the chitosan is 75%, and the average molecular weight is 1.3×10 6 .

[0050] The experimental results are shown in Table 2, Table 3 and Table 4 respectively.

Embodiment 3

[0052] Repeat Example 1 according to the content of each component specified in Table 1, and the sodium silicate is uniformly mixed with nano-titanium dioxide and zirconia equivalent to 10% of its mass; the ionic liquid is 1-butyl-hexafluorophosphate 3-methylimidazole ionic liquid; the N-deacetylation degree of the chitosan is 80%, and the average molecular weight is 1.2×10 6 .

[0053] The experimental results are shown in Table 2, Table 3 and Table 4 respectively.

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Abstract

The invention provides a metal surface treatment agent composed of aqueous solution or aqueous emulsion containing ionic liquid. The metal surface treatment agent comprises the ionic liquid, silicate or silane coupling agent, water-soluble chitin or chitosan, corrosion inhibitor, stabilizer, pH modifier, wetter, coalescing agent, antioxidant, ethanol and water, the ionic liquid is room-temperature ionic liquid consisting of nitrogenous heterocyclic compound cations and inorganic or organic anions, one or more of nanoscale titanium dioxide, zirconium oxide or zirconium fluoride is uniformly mixed into the silicate or silane coupling agent by the weight equivalently accounting for 3%-25% of that of the silicate or silane coupling agent. A chemical conversion coating is formed on a metal surface by the metal surface treatment agent, can inhibit corrosion of the metal surface, and has a fine coating performance. The metal surface treatment agent is used for treating cold-rolled plates, galvanized plates and aluminum plates, and the metal surface treated by the metal surface treatment agent has the coating adhesion force equivalent to that of a metal surface treated by a phosphorus-containing metal surface treatment agent.

Description

technical field [0001] The invention relates to a metal surface treatment agent, in particular to a phosphorus-free metal surface treatment agent, which can replace the traditional phosphating solution metal surface treatment agent to treat metal products. Background technique [0002] The traditional conversion coating treatment solutions to improve metal surface adhesion and corrosion resistance contain chromate or phosphate, although satisfactory results can be obtained, but with the increasing awareness of environmental protection and the continuous maturity of conversion coating technology applications , Traditional phosphating, chromizing and other technologies will be gradually replaced by environmentally friendly conversion coating 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 is to establish a transition film on the protected metal workpiece,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/06C23C22/68
Inventor 曲丰作徐同宽张宏王少君王大鸷马英冲赵吉祥崔励张绍印
Owner DALIAN POLYTECHNIC UNIVERSITY
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