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Coating for engine exhaust pipe with high temperature resistance and salt spray resistance and preparation method thereof

A high temperature and salt spray resistant technology, used in anti-corrosion coatings, epoxy resin coatings, coatings, etc., to achieve the effect of blocking corrosion damage and solving corrosion drawbacks

Active Publication Date: 2017-05-10
南京运昶高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the research on high-temperature resistant coatings has never been interrupted. It is not a problem to prepare coatings that can withstand high temperatures of 300-400 °C or even 500 °C. If it is to reach a high temperature of 800 °C, there are still defects, such as hardness, etc.
The current exhaust pipes simply open a small hole at the end to facilitate the discharge of water, but this does not fundamentally solve the problem

Method used

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  • Coating for engine exhaust pipe with high temperature resistance and salt spray resistance and preparation method thereof
  • Coating for engine exhaust pipe with high temperature resistance and salt spray resistance and preparation method thereof
  • Coating for engine exhaust pipe with high temperature resistance and salt spray resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]

[0024]

[0025] Wherein the organic solvent is a mixture of xylene and n-butanol, and the mass ratio of the two is xylene:n-butanol=3:1.

[0026] Among them, the epoxy curing agent is m-phenylenediamine and diethylene triamine, and the mass ratio of the two is m-phenylenediamine:diethylene triamine=1:1.

[0027] Wherein the composition of the glass powder is calculated by the following mass percentages after selection and adjustment: Al 2 o 3 content is 4%, ZnO content is 28%, B 2 o 3 Content is 30%, P 2 o 5 The content of MgO is 18%, the content of BaO is 6%, the content of CaO is 7%, the content of SrO is 2%, and the content of MgO is 5%. The preparation steps are: mix the raw materials according to the above ratio and put them into the crucible , heated in an electric furnace at 1000°C for 30 minutes, and immediately quenched the obtained glass liquid in deionized water, and finally dried and ground the obtained glass block for later use.

[0028] The t...

Embodiment 2

[0035]

[0036] Wherein the organic solvent is a mixture of xylene and n-butanol, and the mass ratio of the two is xylene:n-butanol=3:1.

[0037] Among them, the epoxy curing agent is m-phenylenediamine and diethylene triamine, and the mass ratio of the two is m-phenylenediamine:diethylene triamine=1:1.

[0038] The preparation process of glass powder and coating is as above-mentioned embodiment 1.

[0039] During construction, mix components A and B evenly for painting, then put it into an oven, and undergo a process of gradually increasing the temperature and curing, that is, curing at 30°C for 3 hours, and then raising the temperature to 180°C for 2 hours.

[0040] According to the experimental results, the coating is coated on the tinplate sheet, the temperature resistance of the coating can reach 700°C, and the adhesion is grade 1. After the thermal cycle test, the 24h salt spray test shows that the base metal has no corrosion lesions.

Embodiment 3

[0042]

[0043] Wherein the organic solvent is a mixture of xylene and n-butanol, and the mass ratio of the two is xylene:n-butanol=3:1.

[0044] Among them, the epoxy curing agent is m-phenylenediamine and diethylene triamine, and the mass ratio of the two is m-phenylenediamine:diethylene triamine=1:1.

[0045] The preparation process of glass powder and coating is as above-mentioned embodiment 1.

[0046] During construction, mix components A and B evenly for painting, then put it into an oven, and undergo a process of gradually increasing the temperature and curing, that is, curing at 30°C for 2 hours, and then raising the temperature to 170°C for 2 hours.

[0047] According to the experimental results, the coating is coated on the tinplate sheet, the temperature resistance of the coating can reach 600°C, and the adhesion is grade 2. After the thermal cycle test, a 24h salt spray test is performed, and a small amount of corrosion lesions appear on the base metal.

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Abstract

The invention relates to a coating with high-temperature resistance and salt fog resistance for an engine exhaust pipe. The coating comprises the following components in percentage by weight: 10-20wt% of organic silicon resin, 10-20wt% of epoxy resin, 1-10wt% of amino resin, 0.5-2wt% of an organosilane coupling agent, 20-40wt% of an organic solvent, 0.1-1wt% of oleic acid, 10-30wt% of glass powder, 10-30wt% of aluminite powder and 1-2wt% of an epoxy hardener. The invention also discloses a preparation method of the coating for the engine exhaust pipe. The coating is wide in used raw material source, and simple in preparation process flow. Through a test, the defect of corrosion of the coating disclosed by the invention is fundamentally solved; corrosive damages of water and oxygen are blocked to the maximal extent; meanwhile, the temperature tolerance of the coating can reach 800 DEG C; the coating has strong adhesive force, salt fog resistance, moisture resistance and heat resistance, and excellent performance, and can withstand a circulating test; and the defects existing in the coating in the current market are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of coatings for engine exhaust pipes, and in particular relates to a coating for engine exhaust pipes with high temperature resistance and salt spray resistance and a preparation method thereof. Background technique [0002] In the ever-changing automotive industry, the role of coatings cannot be ignored, especially as coatings for engine exhaust pipes. Due to the special environmental conditions, the requirements for protective layers are naturally high. The high temperature generated by the exhaust gas is easy to carbonize or degrade the coating, which makes the coating lose its most basic protective effect. Therefore, the research on high-temperature resistant coatings has never been interrupted. It is not a problem to prepare coatings that can withstand high temperatures of 300-400 °C or even 500 °C. If it is to reach a high temperature of 800 °C, there are still defects, such as hardness. We know that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D163/00C09D161/20C09D7/12C09D5/10
Inventor 高延敏赵君高洋
Owner 南京运昶高分子材料有限公司
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