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Aluminum waveguide anti-corrosion treatment method

A technology of corrosion treatment and aluminum wave, which is applied in the field of micro-arc oxidation treatment, can solve the problems of reduced anti-corrosion performance, poor anti-corrosion reliability, and low applicable temperature range, and achieve the effect of preventing chemical corrosion and electrochemical corrosion

Inactive Publication Date: 2020-05-15
南京长江电子信息产业集团有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-silver plating takes into account both protection and high-frequency characteristics, but the nickel-silver coating of aluminum alloy parts is a cathodic coating, and its anti-corrosion reliability is poor in harsh environments
Chemical conductive oxidation treatment has certain corrosion resistance and electrical conductivity, but its applicable temperature range is lower than 60 °C, and when it exceeds 60 °C, the anti-corrosion performance will be greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the present invention, the process flow of micro-arc oxidation (MAO20, oxide film thickness 18 μm to 23 μm) treatment on the whole aluminum waveguide is as follows: organic degreasing→water washing→mounting→micro-arc oxidation→water washing→sealing→water washing→drying.

[0018] The specific process is as follows:

[0019] (1) Organic degreasing

[0020] Clean with 120# aviation gasoline.

[0021] (2) Hanging

[0022] The hanger can be made of aluminum alloy, and the cathode material can be made of stainless steel.

[0023] (3) Micro-arc oxidation

[0024] Electrolyte: (NaPO 3 ) 6 20~40 g / L, Na 2 O· n SiO 2 10-30 g / L, KOH 2-5 g / L. Voltage 500~600V, current density 2~2.5 A / dm 2 , frequency 500Hz, duty cycle 10% to 50%, temperature 15 ℃ to 40 ℃, time 50 to 60 min, oxide film thickness 18 to 23 μm.

[0025] (4) closed

[0026] DSE-30 sealing agent 60-100 mL / L Stir well in deionized water, temperature 50 ℃-60 ℃, soaking time 5-10 min, stay in the air for 10...

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Abstract

The invention provides an aluminum waveguide anti-corrosion treatment method. The micro-arc oxidation treatment is applied to aluminum waveguide, the requirement for microwave transmission performancecan be met, and meanwhile the requirement for anti-corrosion performance is met. By means of the method, the micro-arc oxidation treatment is performed on the whole aluminum waveguide, after the treatment, the thickness of an insulating oxidation film is 18-23 [mu]m. The insulating oxidation film treatment is performed on the aluminum waveguide, and compared with anti-corrosion surface treatmentof conventional aluminum waveguide, the anti-corrosion performance of the aluminum waveguide is quite excellent. Through electrical property tests, the requirements of a high-power aluminum waveguidemicrowave transmission technology are met, and the technology can be widely applied to microwave electronic equipment running in outdoor marine harsh climate environments for a long time.

Description

technical field [0001] The invention relates to a micro-arc oxidation treatment technology for the whole aluminum waveguide, in particular to an anti-corrosion method for forming a thick insulating oxide film on the surface of the aluminum waveguide. The technology satisfies the anti-corrosion requirements of the aluminum waveguide for long-term use in the outdoor marine harsh climate environment, and belongs to the technical field of the surface treatment of the aluminum waveguide by microwave electronic equipment. Background technique [0002] The waveguide of microwave electronic equipment is usually made of copper alloy material, such as H62, H96, T2, TU1 and so on. For some electronic equipment, in order to control the weight of the equipment, the waveguide material is changed from copper alloy material to aluminum alloy material. The aluminum alloy material includes 6063, 3A21 and so on. Compared with copper waveguides, aluminum waveguides have the advantage of light ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06H01P11/00
CPCC25D11/026C25D11/06H01P11/001
Inventor 钱建国杨勇秦海平
Owner 南京长江电子信息产业集团有限公司
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