High-temperature-resistant anticorrosive smooth coating layer used in stainless steel blade surfaces and preparation method of coating layer

A stainless steel, high temperature resistant technology, used in anti-corrosion coatings, coatings, fire-resistant coatings, etc., can solve problems such as corrosion or erosion damage, reduced air flow of compressors, and reduced efficiency, and achieves improved finish, improved efficiency, and reduced porosity. effect of structure

Inactive Publication Date: 2019-07-16
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A large number of stainless steel materials are used in the manufacturing process of the compressor blades of aero-engines and ground gas turbines. During use, they have to withstand the impact of high-pressure and high-speed air, the erosion of corrosive media, and high-temperature oxidation and corrosion, which are prone to corrosion or erosion damage At the same time, under the condition of corrosion and erosion of compressor blades, oil and gas in the air, industrial waste gas, and oil and gas in the lubrication system will scale on the surface of the blades, resulting in a decrease in the air flow rate and efficiency of the compressor.

Method used

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  • High-temperature-resistant anticorrosive smooth coating layer used in stainless steel blade surfaces and preparation method of coating layer

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Embodiment 1

[0021] According to the dosage in Table 1, aluminum phosphate, magnesium phosphate, chromium phosphate and acidic silica sol are used as film-forming substances, zinc orthophosphate, zinc molybdenum orthophosphate and aluminum strontium polyphosphate powder are added as anti-corrosion fillers, and mica powder and talcum powder are selected. , Alumina powder is used as a high temperature resistant filler, the average particle size of all fillers is 2-3.5μm, the wetting and dispersing agent is BYK-180, and the surface slip agent is BYK-301. After preparing the coating, it is sprayed on the surface of the stainless steel blade. The layer was dried at room temperature for 20 minutes, then kept at 80°C for 15 minutes, and finally heated at 340°C for 30 minutes to prepare a smooth coating.

Embodiment 2

[0023] According to the dosage in Table 1, aluminum phosphate, magnesium phosphate, chromium phosphate and acidic silica sol are used as film-forming substances, aluminum zinc orthophosphate, aluminum zinc polyphosphate and aluminum calcium polyphosphate powder are added as anti-corrosion fillers, and talcum powder is selected as anti-corrosion filler. High-temperature fillers, the average particle size of all fillers is 2-3.5 μm, add the wetting and dispersing agent BYK-190, and the surface slippery agent is BYK-331. After the coating is prepared, it is sprayed on the surface of the stainless steel blade, and the coating is dried at room temperature for 20 minutes. Then keep at 80°C for 15min, and finally heat at 340°C for 30min to prepare a smooth coating.

Embodiment 3

[0025] According to the dosage in Table 1, aluminum phosphate, magnesium phosphate, chromium phosphate and acidic silica sol are used as film-forming substances, and aluminum zinc orthophosphate, aluminum zinc polyphosphate, aluminum strontium polyphosphate and aluminum calcium polyphosphate powder are added as anti-corrosion fillers, Select alumina powder as the high temperature resistant filler, the average particle size of all fillers is 2-3.5μm, add the wetting and dispersing agent BYK-192, the surface slippery agent is BYK-378, spray on the surface of the stainless steel blade after preparing the coating, The layer was dried at room temperature for 20 minutes, then kept at 80°C for 15 minutes, and finally heated at 340°C for 30 minutes to prepare a smooth coating.

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Abstract

The invention relates to a high-temperature-resistant anticorrosive smooth coating layer used in stainless steel blade surfaces and a preparation method of the coating layer. The coating layer is prepared by using the following steps: a phosphate and silica sol are adopted as film forming substances, modified orthophosphate or polyphosphate powder is adopted as an anticorrosive filler, mica powder, talc powder and aluminum oxide powder are selected as a high-temperature-resistant filler, particle size distribution of the filler is strictly controlled, surface auxiliary agents such as a wettingdispersing agent and a surface slip agent are added to prepare a coating material, the coating material is sprayed onto the stainless steel blade surfaces, and heating curing is performed to preparethe smooth coating layer. According to the method provided by the invention, the coating layer prepared by the method is resistant to high-temperature corrosion and has an excellent surface finish, and can significantly improve aerodynamic performance of engines when applied to the stainless steel blade surfaces of the aero-engines, thereby improving efficiency of the engines.

Description

technical field [0001] The invention relates to a high-temperature-resistant anti-corrosion smooth coating for the surface of stainless steel blades and a preparation method thereof, belonging to the technical field of coating preparation. Background technique [0002] A large number of stainless steel materials are used in the manufacturing process of the compressor blades of aero-engines and ground gas turbines. During use, they have to withstand the impact of high-pressure and high-speed air, the erosion of corrosive media, and high-temperature oxidation and corrosion, which are prone to corrosion or erosion damage At the same time, under the condition of corrosion and erosion of compressor blades, oil and gas in the air, industrial waste gas, and oil and gas in the lubrication system will foul on the surface of the blades, resulting in a decrease in the air flow rate and efficiency of the compressor. [0003] Phosphate coating is a protective coating with triple function...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/61
CPCC09D1/00C09D5/08C09D5/18C09D7/61
Inventor 杨瑞原玲刘虎汤智慧
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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