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High-temperature chlorine corrosion resistant coating and preparation method thereof

A technology of chlorine corrosion and high temperature resistance, which is applied in the direction of anti-corrosion coatings, fire-proof coatings, alkali metal silicate coatings, etc., and can solve the problems that the anti-chlorine corrosion affects the service life and effect of the coating, and the anti-chlorine corrosion needs to be improved.

Active Publication Date: 2018-10-02
ZHAOSHAN TECH BEIJING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of measures to prevent high-temperature corrosion of boiler heating surfaces, corrosion-resistant coating technology has the advantages of good performance and high economic efficiency, and has achieved good results in preventing sulfur corrosion, but the effect in preventing chlorine corrosion still needs to be improved. Poor chlorine corrosion resistance of the coating will seriously affect the service life and effect of the coating

Method used

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  • High-temperature chlorine corrosion resistant coating and preparation method thereof
  • High-temperature chlorine corrosion resistant coating and preparation method thereof
  • High-temperature chlorine corrosion resistant coating and preparation method thereof

Examples

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preparation example Construction

[0037] The application also provides the preparation method of the high temperature chlorine corrosion resistant coating, comprising:

[0038] Mixing 20-35wt% binder with water to obtain binder liquid;

[0039] The binder liquid is mixed with 20-30wt% filler, and the high temperature chlorine corrosion resistant coating is obtained after grinding.

[0040] In the preparation process of the above-mentioned preparation of high-temperature chlorine corrosion resistant coatings, the binder is first mixed with water to obtain a binder liquid; after the binder liquid is obtained, the binder liquid is mixed with a filler, and then preferably added After the additive is stirred and ground, the high temperature chlorine corrosion resistant coating can be obtained.

[0041] In order to prevent the carbon nanotubes from being broken during the grinding process, the grinding is preferably performed using a planetary ball mill, and the time of the ball milling is 1-2 hours.

[0042] The ...

Embodiment

[0045] Mix the binder potassium silicate with water to obtain a binder liquid, then add three additives such as a dispersant vinyl bis stearamide, a defoamer n-octanol and a rheological agent organic bentonite, and add fillers, wherein the fillers include: barium Glass powder, carbon nanotubes, aluminum oxide are then filtered and packaged after being ground by a planetary ball mill for 1 hour to obtain the coating; the above-mentioned coating can be divided into 5 embodiments according to the content of the specific components, and the ceramics of embodiments 1 to 5 are The paint component content data table is as shown in Table 1:

[0046] Table 1 Embodiment 1~Example 5 Ceramic coating material each group material content and specification data (wt%)

[0047]

[0048]

[0049] The coatings in Examples 1 to 5 were sprayed on the surface of the 20G steel material commonly used in boiler water walls, and their high-temperature chlorine corrosion resistance was tested;

[0...

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Abstract

The invention provides a high-temperature chlorine corrosion resistant coating which comprises 20-30wt% of a filler, 20-35wt% of an adhesive and the balance of water, wherein the filler comprises 12-15wt% of barium glass, 2-5wt% of carbon nanotubes and 6-10wt% of aluminum oxide. The invention further provides a preparation method of the high-temperature chlorine corrosion resistant coating. The coating provided by the invention can be applied to heating-absorbing surfaces such as a boiler water cooling wall, can form a dense ceramic coated layer after high temperature curing, and is capable ofeffectively retarding high-temperature chlorine corrosion of the heating-absorbing surfaces.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-temperature chlorine corrosion resistant coating and a preparation method thereof. Background technique [0002] During the operation of biomass boilers and domestic waste incinerators, burning high-chlorine fuels such as biomass and domestic waste will cause serious high-temperature chlorine corrosion problems on the heating surface of the boiler, resulting in serious corrosion of superheater tubes and boiler metal heating surfaces. Chlorine in high-chlorine fuel usually reacts directly with the heating surface, which increases the oxidation rate of the metal on the heating surface of the boiler, and at the same time, its corrosion rate also accelerates accordingly. According to statistics, the corrosion rate of the tube wall on the heating surface of boilers burning biomass and domestic waste can reach 5-12 mm / year, resulting in frequent tube replacement on the heating ...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D7/61C09D7/63C09D5/08
CPCC09D1/04C09D5/08C09D5/18C09D7/61C09D7/63C09D7/67
Inventor 邰召山
Owner ZHAOSHAN TECH BEIJING CO LTD
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