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Antirust paint

An anti-rust coating and anti-rust treatment technology, which is applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., and can solve the problems of reduced storage stability

Inactive Publication Date: 2012-10-03
TIANCHANG JULONG TRAVEL PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a chromium-free method and has an excellent anti-rust effect, however, when the amount of water-dispersible silica added increases, its storage stability decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] a) Preparation of test objects

[0041] Using a coater, the rust inhibitor of the present invention (solid content: 20% by weight) was applied to commercially available electrogalvanized steel "EG-MO" and fusion sprayed coating at a dry film thickness of 1 µm. Al-10% Si steel (plating amount is 30g / m 2 ), and then dried at PMT 150°C.

[0042] b) Salt spray test (SST resistance)

[0043] At 35°C, a 5% aqueous solution of sodium chloride was sprayed onto the coated side of the coated article, and after 360 hours, the matte area and the Ericssen (Ericssen) 7mm extruded area were evaluated, graded to achieve 10 is the best. The evaluation criteria are as follows.

[0044] 10 points: no abnormality

[0045] 9 points: between 10 points and 8 points

[0046] 8 points: Slight white rust formation

[0047] 7-6 points: between 8 points and 5 points

[0048] 5 points: White rust is formed on half the area

[0049] 4-2 points: between 5 points and 1 point

[0050] 1 point...

Embodiment 1

[0058] A polyolefin resin and a polyurethane resin were mixed in pure water at a solid ratio of 1:1 to obtain a total resin solid concentration of 20% by weight. Then dissolve 20g / L allylthiourea, 15g / L LEDTA tetrasodium, 2g cerium ion, and finally add water-dispersible silica at 30g / L. Stir for 30 minutes to disperse the mixture, then adjust the pH to 8.0 to obtain an antirust paint. To evaluate the antirust ability of the substrates and the adhesion of the topcoat, the obtained antirust coatings were applied to commercial electrogalvanized steel and dried as described in the evaluation section above. Electroplated galvanized steel was degreased with an alkaline degreaser, washed with water, and dried prior to evaluation. The evaluation results are shown in Table 1.

Embodiment 2-5

[0060] Antirust paint was prepared similarly to Example 1, except that the content of each substance used was different from Example 1. The specific composition is shown in Table 1.

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PUM

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Abstract

The invention relates to an antirust paint. 1L of composition containing at least one aqueous resin and water as main component contains 10-40g of allyl thiourea, 10-20g of tetrasodium EDTA (ethylene diamine tetraacetate), 0.5-5g of rare earth ion and 20-40g of water-dispersible silicon dioxide. The antirust paint has wonderful corrosion resistance and stability.

Description

technical field [0001] The present invention relates to a surface treatment composition and a surface treatment method for metallic materials, metal-plated steel or unplated steel, and provides a rust-proofing method capable of providing metallic materials with sufficient corrosion resistance coating. Background technique [0002] In salty environments such as seawater or high temperature / humidity environments, white rust stains will form on the surface of metal-plated steel, resulting in significantly deteriorated appearance or reduced rust resistance on the iron surface of the base material. [0003] In order to prevent the formation of this white rust, chromium-containing treatment solutions have been widely used, but due to the pollution of chromium to the environment, the demand for chromium-free antirust treatment agents is increasing. [0004] Japanese Patent Application Publication No. 9-123813 discloses an aqueous resin-based chromium-free antirust paint containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/12C09D123/00C09D175/04
Inventor 祝盆鑫
Owner TIANCHANG JULONG TRAVEL PAINT
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