Technique for treating synergism coat of aluminium alloy material and fluorine polymer

A technology of aluminum alloy materials and fluoropolymers, applied in the direction of coating, pretreatment surface, surface reaction electrolytic coating, etc., can solve the problems of high friction coefficient, poor corrosion resistance, difficulty in lubrication, etc., and achieve good matting performance, The possibility of carbonization and decomposition is small, and the effect of not being easily deformed

Inactive Publication Date: 2005-10-26
NO 59 RES INST OF CHINA ORDNANCE IND
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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 solve the deficiencies in the existing surface protection technology of aluminum alloy materials, such as soft quality, poor corrosion resistance, high friction coefficient, lar...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1: The aluminum alloy material is a 7A04T6 test plate, 50mm×50mm×3mm, polished to a surface roughness of Ra1.6~Ra0.8, spare; or samples of aluminum alloy parts for optoelectronic instruments that need to be processed. ① Degreasing the sample with alkaline degreasing solution at 60~75℃ for 5~10min; rinsing with tap water for 30S and running water cleaning for 15S; then etching and washing at 60~75℃ for 2~5min in 40~50g / l sodium hydroxide solution, Remove the oxide film on the surface of aluminum alloy; rinse with tap water for 30S, rinse with running water for 30S; ②Acid pickling treatment in 20-30% nitric acid liquid for 2-10min at room temperature to remove the ash and residue on the surface caused by etching; rinse with tap water for 30S , Running water cleaning for 15S; ③Hard anodizing treatment: Carry out hard anodizing treatment according to the hard anodizing bath and process conditions given in Table 1; the thickness of the film is controlled at 20-50μm, and ...

example 2

[0032] Example 2: Prepare hard anodized samples according to the process given in Example 1; carry out electrochemical AC reaming treatment according to the reaming solution and process conditions given in Table 2; rinse with tap water for 30S and wash with running water for 15S; use after reaming Dry in cold air for later use.

[0033] Composition of electrochemical hole expanding solution

Reaming process conditions

Material

Content (g / l)

Electrochemical reaming: the workpiece is the anode and the cathode is

Lead plate, temperature 20~25℃, voltage 8~15V,

Time 5min;

Phosphoric acid (85%)

150

Oxalic acid

20

[0034] After reaming, the surface is uniformly brown to black, with no ash, no film loss, and no corrosion on the substrate. The pores on the surface are uniform, clear and neatly arranged by scanning electron microscope microscopic analysis.

[0035] Hot dipping fluoropolymer and vacuum precision heat tr...

example 3

[0037] Example 3: Prepare hard anodized samples according to the process given in Example 1; chemically expand the hole in 100g / l sulfuric acid expansion solution, the process conditions are 20~25℃, 5min; rinse with tap water for 30S, rinse with running water 15S; After reaming, blow dry with cold air for use.

[0038] After reaming, the surface is uniformly brown to black, with no ash, no film loss, and no corrosion on the substrate. The pores on the surface are uniform, clear and neatly arranged by scanning electron microscope microscopic analysis.

[0039] Hot dipping fluoropolymer and vacuum precision heat treatment: the hard anodized reamed sample is hot dipped in 70g / l polytetrafluoroethylene emulsion solution at 80~90℃ for 15min, taken out and dried in the air, then put into heat treatment In the furnace, treat at 370-380°C for 60 minutes under a vacuum of 0.5-0.05 Pa. After cooling to a temperature below 150°C, close the vacuum system, take out the sample and cool it to ro...

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Abstract

The present invention relates to a technique of treating coat the film made of aluminum alloy fluorine-polymer. Material or part of aluminum alloy should be hard anodizing first and introduce fluorine-polymer in the pore or on the surface. We can also expend the pore first and introduce fluorine-polymer on the surface and in the pore later. Fuse fluorine-polymer and anode oxidation coat together by vacuum heat treatment for high temperature. It's suitable for part of optic-electronic equipment. Firstly, it has good extinction, doesn't fade and doesn't break off: secondly, it is rigid and wearable; thirdly, it contains fluorine-polymer, has low friction coefficient, has the capability of self-lubricating, so its wearable and anti-corrosive performance can be improved a lot; fourthly, it has capability of hydrophobicity and can bear litmusless salt spray, so it can sustain most of the corrosion in bad condition and corrodent matter. Fifthly, the surface is self-lubricating, and has the capability of self-lubricating and dustproof.

Description

Technical field [0001] The invention relates to the coating treatment of aluminum alloy materials, in particular to a fluorine-containing polymer coordinated coating treatment process for aluminum alloy parts of optoelectronic instruments. Background technique [0002] In the modern civil and military industry, in order to meet the requirements of high strength, corrosion resistance and light weight, aluminum alloy materials are increasingly used in the design and manufacture of equipment and general machinery. Aluminum alloy materials are used in military equipment and civilian products. It occupies an important position in the design and manufacture of the light-weight materials, and is the most important lightweight material; a large number of aluminum alloys are used in optoelectronic products, and many parts of various optical sighting systems, optical ranging systems, electronic information instruments, computers, etc. are made of hard Aluminum, super-hard aluminum, forged ...

Claims

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Application Information

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IPC IPC(8): C25D11/10
Inventor 邹洪庆吴厚昌吕基成方敏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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