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Assembly painting method for improving coating adhesion force

An adhesion and component technology, applied in coatings, devices for coating liquids on surfaces, pretreatment surfaces, etc., can solve the problems of poor exterior decoration of components, low coating adhesion, etc., and achieve good high and low temperature test performance, Enhance the effect of environmental adaptability and operability

Inactive Publication Date: 2016-04-27
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a component painting method that enhances the adhesion of the coating, thereby solving the problems of aluminum alloy, magnesium alloy or titanium alloy materials in the prior art, the coating adhesion is not high, and the component appearance is poorly decorated.

Method used

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  • Assembly painting method for improving coating adhesion force

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The assembly painting method of the enhanced coating adhesion of the present embodiment, parts are all aluminum alloy materials, comprise the following steps:

[0026] 1) Check whether there are scratches, dirt, oxide skin, rust and other defects on the surface of the part, and roughen the surface after passing the test, and polish the surface of the part with No. 360 sandpaper to make the surface roughness reach 1.6-6.3μm; painted surface;

[0027] 2) Prepare a mixed solvent with aviation washing gasoline and ethanol at a volume ratio of 2:1 to clean the surface of the part; wipe the surface of the part with a white silk cloth dipped in the solvent, and if there is no dirt, it is qualified; after passing the pass, dry it in an oven at 50 ° C for 15 minutes, and naturally Cool to room temperature;

[0028] 3) Spray epoxy primer EP506, spray 4 times in a cross pattern, let it dry for 120 minutes, then place it in an oven at 50°C for 1 hour, and control the dry film thic...

Embodiment 2

[0033] The assembly painting method of the enhanced coating adhesion of the present embodiment, parts are all magnesium alloy materials, comprise the following steps:

[0034] 1) Check whether there are scratches, dirt, oxide skin, rust and other defects on the surface of the part. After passing the test, roughen the surface of the part and polish the surface of the part with No. 600 sandpaper to make the surface roughness reach 1.6-6.3μm; use tape to protect painted surface;

[0035] 2) Prepare a mixed solvent with aviation washing gasoline and ethanol at a volume ratio of 2:1 to clean the surface of the part; wipe the surface of the part with a white silk cloth dipped in the solvent, and if there is no dirt, it is qualified; after passing the pass, dry it in an oven at 50°C for 60 minutes, and then dry it naturally. Cool to room temperature;

[0036] 3) Spray epoxy primer EP506, spray 4 times in a cross pattern, let it dry for 120 minutes, then place it in an oven at 50°C f...

Embodiment 3

[0041] The assembly painting method of the enhanced coating adhesion of the present embodiment, parts are all titanium alloy materials, comprise the following steps:

[0042]1) Check whether there are scratches, dirt, oxide skin, rust and other defects on the surface of the part. After passing the test, roughen the surface of the part and polish the surface of the part with No. 500 sandpaper to make the surface roughness reach 1.6-6.3μm; use tape to protect painted surface;

[0043] 2) Prepare a mixed solvent with aviation washing gasoline and ethanol at a volume ratio of 2:1 to clean the surface of the part; wipe the surface of the part with a white silk cloth dipped in the solvent, and if there is no dirt, it is qualified; after passing the pass, dry it in an oven at 50 ° C for 30 minutes, and naturally Cool to room temperature;

[0044] 3) Spray epoxy primer 725-H06-19, spray 4 times in a cross pattern, let it dry for 120 minutes, then place it in an oven at 50°C for 1 hou...

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Abstract

The invention discloses an assembly painting method for improving coating adhesion force. The method comprises the following steps: 1) roughing the surfaces of parts, controlling the roughness of the surfaces to be 1.6 to 6.3 microns, then washing through a solvent, and drying; 2) spraying epoxy primer, and controlling the thickness of a dried film to be 70 to 100 microns; 3) spraying fluorocarbon finish, and controlling the thickness of the dried film to be 30 to 50 microns; 4) assembling the parts to be an assembly, grinding and levelling a painted part of the assembly, removing dirt, spraying fluorocarbon finish, and controlling the thickness of the dried film to be 30 to 50 microns, so as to obtain the product. According to the method, the parts are painted, and then the assembly is sprayed with the paint, and the process parameters of each stage are controlled, so that the environmental suitability of the parts can be improved; besides the high adhesion force, a coating of the assembly is outstanding in salt mist resistance, moist heat resistance, mould resistance, high temperature resistance and low temperature resistance; the coating is uniform and consistent in appearance and high in decoration performance.

Description

technical field [0001] The invention belongs to the technical field of metal surface coatings, in particular to a component painting method for enhancing coating adhesion. Background technique [0002] Coatings for military products such as aviation, aerospace, and automobiles require excellent peeling resistance and beautiful decoration. In addition to good corrosion resistance, the coating should also have resistance to heat and humidity, salt spray, mold, and High and low temperature characteristics. In order to meet the requirements of light weight and high strength, the above products often choose aluminum alloy, magnesium alloy or titanium alloy material. [0003] At present, the coating process of the above-mentioned component products is that the parts are processed, surface treated, put into storage and wait for assembly, commissioning, turnover and then arrange painting. This process takes 1 to 2 months, and the surface of the parts is seriously polluted. Becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/38B05D1/12B05D3/00B05D3/02
Inventor 刘红霞吴晓鸣高宏昌
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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