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Preparation method of high temperature resistant anticorrosive coating

An anti-corrosion coating and high-temperature-resistant technology, applied in anti-corrosion coatings, coatings, etc., can solve problems such as failure and low corrosion resistance, and achieve the effects of enhanced adhesion, easy operation, and simple process

Inactive Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN201010032473 uses phenolic resin solution, green silicon carbide powder and white corundum powder as raw materials. After mixing, drying and curing can obtain a coating with excellent heat insulation performance. Failure under highly corrosive conditions
However, this patent needs to use expensive precious metal materials such as zirconium and cobalt, and the coating has low corrosion resistance in high temperature and high chlorine environments

Method used

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  • Preparation method of high temperature resistant anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 100 g of water-soluble phenolic resin (the content of phenolic resin is 53%) and 10 g of carbon black powder. The two raw materials were stirred in a three-neck flask at a rotation speed of 500 rpm for 1.5 hours to obtain a mixture. The 321 stainless steel wire drawing sheet after the wire drawing treatment is ultrasonically cleaned and dried. Apply the mixture evenly on the surface of the 321 stainless steel wire drawing sheet with a coating roller. The coated 321 stainless steel wire drawing sheet was placed in a fume hood for 3 hours, and then the 321 stainless steel wire drawing sheet was placed in an oven at 150° C. to dry and cure for 12 hours to completely remove the solvent. The dried and cured sheet was placed in a muffle furnace, kept in an air atmosphere, and reacted at 300°C for 12 hours. Get a high temperature resistant anti-corrosion coating. The coating thickness is 0.09mm. The adhesion of the coating was measured, and the results are shown in T...

Embodiment 2

[0030] Weigh 100g of water-soluble phenolic resin (the content of phenolic resin is 53%) and 10g of diatomaceous earth. The two raw materials were stirred in a three-neck flask at a rotation speed of 500 rpm for 3 hours. resulting mixture. The 321 stainless steel wire drawing sheet after the wire drawing treatment is ultrasonically cleaned and dried. Apply the mixture evenly on the surface of the 321 stainless steel wire drawing sheet with a coating roller. The coated 321 stainless steel wire drawing sheet was placed in a fume hood for 5 hours, and then the 321 stainless steel wire drawing sheet was placed in an oven at 150°C to dry and cure for 15 hours to completely remove the solvent. The dried and cured sheet was placed in a muffle furnace, kept in an air atmosphere, and reacted at 300° C. for 16 hours. Get a temperature-resistant anti-corrosion coating. The coating thickness is 0.12mm. The adhesion of the coating was measured, and the results are shown in Table 1.

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Abstract

The invention provides a preparation method of a high temperature resistant anticorrosive coating. The pretreatment of a coating substrate metalwork and the selective control the reaction temperature in the preparation process make the adhesion of the prepared high temperature resistant anticorrosive coating to the above substrate enhanced. Raw materials of the coating comprise 70-92wt% and preferably 80-90wt% of a liquid phenolic resin and 8-30wt% of an additive, wherein the content of a phenolic resin in the liquid phenolic resin is 40-60wt%, and the phenolic carbon yield is 40-65wt%. The additive can be selected from one of more of carbon black powder, carbon fibers, diatomite and white carbon black. It is especially suitable for use the coating prepared through the method in 600-850DEG C rare earth smelting chlorination furnaces.

Description

technical field [0001] The invention relates to a preparation method of a high temperature resistant anticorrosion coating. Background technique [0002] At present, the decomposition methods of rare earth concentrates are mainly acid decomposition method, alkali decomposition method and high temperature chlorination method. The chlorination process is usually to mix carbon and rare earth concentrate to form pellets, and directly pass chlorine gas under the high temperature of the vertical chlorination furnace, and produce chlorides of rare earth metals according to the differences in the boiling points of different chlorides formed. [0003] However, because the equipment corrodes severely under the condition of chlorine gas, the popularization of this method is poor, and the corroded equipment needs to be replaced frequently in enterprises using this method, thereby causing an increase in production costs. Similarly, the acid decomposition method also has a problem of equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/06C09D5/08
Inventor 张龙贵刘宣伯侯家祥任毅马蓓蓓罗水源
Owner CHINA PETROLEUM & CHEM CORP