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Method for improving environment-resistant performance of surface paint layer of titanium alloy part

A titanium alloy, environment-resistant technology, used in devices for coating liquids on surfaces, pretreatment surfaces, metal material coating processes, etc., can solve problems such as paint peeling, cracks, etc., to improve environmental resistance performance and easy operation. , the effect of increasing surface energy

Pending Publication Date: 2021-03-12
ZHENGZHOU AIRCRAFT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a titanium alloy surface treatment method with convenient operation and brief procedures for the problems of paint peeling and cracks in the actual use of the titanium alloy surface paint layer and environmental assessment according to GJB150 and other standards. Combining a variety of titanium alloy surface treatment processes effectively increases the surface energy of the titanium alloy substrate, improves the anti-shedding ability of the titanium alloy surface paint layer under alternating temperature and humidity environments, and then improves the titanium alloy surface paint layer. Environmental resistance

Method used

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  • Method for improving environment-resistant performance of surface paint layer of titanium alloy part
  • Method for improving environment-resistant performance of surface paint layer of titanium alloy part
  • Method for improving environment-resistant performance of surface paint layer of titanium alloy part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1 Sand blowing: the sand particle size is 40-70 mesh, the air pressure is 0.2MPa, and the distance between the nozzle and the part is 130mm.

[0026] 2 Degreasing: Chemical degreasing solution components and process conditions are as follows:

[0027]

[0028]

[0029] 3 Passivation: passivation process within 4 hours after sand blowing. The composition of the passivation solution is: nitric acid (HNO3), the volume ratio: 45%, the operating temperature: 49-52° C., and the operating time: 35 minutes.

[0030] 4 Cleaning: The parts are washed in water at 30-60°C for 2-5 minutes. Then wash in running cold water at room temperature for 1 to 3 minutes.

[0031] 5. Drying: It is preferred to use dry and clean hot compressed air below 60°C to dry the parts.

[0032] 6 Painting: paint within 24 hours after passivation. The painting process is as follows: the distance between the nozzle of the spray gun and the surface of the part is 150-250mm, and the pressure of the ...

Embodiment 2

[0034] 1 Sand blowing: the sand particle size is 40 / 70 mesh, the air pressure is 0.3MPa, and the distance between the nozzle and the part is 200mm.

[0035] 2 Degreasing: Alkaline degreasing method

[0036] 3 Passivation: passivation process within 4 hours after sand blowing. The composition of the passivation solution is: nitric acid (HNO3), the volume ratio: 53%, the operating temperature: 49-52° C., and the operating time: 7 minutes.

[0037] 4 Cleaning: The parts are washed in water at 30-60°C for 2-5 minutes. Then wash in running cold water at room temperature for 1-3 minutes.

[0038] 5. Drying: It is preferred to use dry and clean hot compressed air below 60°C to dry the parts.

[0039] 6 Painting: paint within 24 hours after passivation. The painting process is a conventional painting process.

Embodiment 3

[0041] 1 Sand blowing: the sand particle size is 40 / 70 mesh, the air pressure is 0.5MPa, and the distance between the nozzle and the part is 300mm.

[0042] 2 Degreasing: Alkaline degreasing method

[0043] 3 Passivation: passivation process within 4 hours after sand blowing. The composition of the passivation solution is: nitric acid (HNO3), the volume ratio: 47%, the operating temperature: 51-54° C., and the operating time: 28 minutes.

[0044] 4 Cleaning: The parts are washed in water at 30-60°C for 2-5 minutes. Then wash in running cold water at room temperature for 1-3 minutes.

[0045] 5. Drying: It is preferred to use dry and clean hot compressed air below 60°C to dry the parts.

[0046] 6 Painting: paint within 24 hours after passivation. Conventional painting process.

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Abstract

The invention belongs to the technical field of surface treatment of titanium alloys, and relates to a method for improving environment-resistant performance of a surface paint layer of a titanium alloy part. The method is mainly a solution for solving problems such as paint layer falling and cracking when the titanium alloy part for surface paint coating is used actually and environmental assessment is conducted according to standard such as GJB150. The process flow of the method comprises the following steps of sand blowing / deoiling / passivating / drying / paint coating, so that the surface energy of a titanium alloy matrix is increased effectively, and the anti-falling ability of the paint layer in a temperature and humidity alternating environment is improved, and thereby, the environment-resistant performance of the surface paint layer of the titanium alloy is further improved. The method improves the service performance of a paint coating product of the titanium alloy and lowers the later maintenance cost of the product. The method is convenient to operate and suitable for being industrially produced and applied on a large scale.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy surface treatment and relates to a method for improving the environmental resistance performance of a paint layer on the surface of titanium alloy parts. Background technique [0002] Titanium and titanium alloys have the advantages of low density, corrosion resistance, and high specific strength, and are widely used in many industries such as aviation and aerospace. In actual use, the surface of titanium alloy parts can be used directly without painting; for titanium alloy parts that need to be painted, after conventional surface treatment such as anodizing or passivation of titanium alloys, the paint can be used for assembling products after drying . Practice has proved that titanium alloy parts painted after surface treatment according to conventional methods are used for a period of time at room temperature, or when environmental performance assessments such as damp heat, rain, tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D3/10B05D3/00C23C22/73
CPCB05D7/14B05D3/102B05D3/002C23C22/73B05D2202/35
Inventor 王陆阳黄红武李正望薛卫东
Owner ZHENGZHOU AIRCRAFT EQUIP
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