Aluminum alloy surface micro-arc oxidation treatment technology

A technology of micro-arc oxidation on the surface of aluminum alloy, applied in the direction of anodic oxidation, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of poor hydrophobicity, increase surface roughness, improve corrosion resistance, and inhibit surface corrosion Effect

Inactive Publication Date: 2021-12-03
SHANDONG YUHANG SPECIAL ALLOY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of poor hydrophobicity of aluminum alloy materials in the existing marine environment, the present invention provides a micro-arc oxidation treatment process on the surface of aluminum alloys to solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A micro-arc oxidation treatment process for the surface of an aluminum alloy, comprising the steps of:

[0026] (1) Surface pretreatment: Use 5A01 aluminum alloy as the substrate, seal the area other than the working surface of the aluminum alloy substrate with epoxy resin, polish the working surface of the aluminum alloy substrate with SiC sandpaper, and use anhydrous Ethanol and deionized water were used to clean the substrate surface.

[0027] (2) Configure micro-arc oxidation electrolyte: use deionized water to prepare 15g / L sodium silicate, 2g / L potassium hydroxide, and 2g / L sodium hexametaphosphate to form a silicate system electrolyte, stir for 0.5min and then ultrasonic Shake for 1 min, and then stand still for 8 h to obtain a micro-arc oxidation electrolyte.

[0028] (3) Micro-arc oxidation: Put the aluminum alloy substrate after surface pretreatment into the micro-arc oxidation electrolyte, use the aluminum alloy substrate as the anode, and the micro-arc oxid...

Embodiment 2

[0033] A micro-arc oxidation treatment process for the surface of an aluminum alloy, comprising the steps of:

[0034] (1) Surface pretreatment: use 5A30 aluminum alloy as the substrate, seal the area other than the working surface of the aluminum alloy substrate with epoxy resin, polish the working surface of the aluminum alloy substrate with SiC sandpaper, and use anhydrous Ethanol and deionized water were used to clean the substrate surface.

[0035] (2) Configure micro-arc oxidation electrolyte: use deionized water to prepare 25g / L sodium silicate, 4g / L potassium hydroxide, and 5g / L sodium hexametaphosphate to form a silicate system electrolyte, stir for 2 minutes and then ultrasonically oscillate 3min, and then stand still for 12h to obtain the micro-arc oxidation electrolyte.

[0036] (3) Micro-arc oxidation: put the aluminum alloy substrate after surface pretreatment into the micro-arc oxidation electrolyte, use the aluminum alloy substrate as the anode, and the micro-...

Embodiment 3

[0041] A micro-arc oxidation treatment process for the surface of an aluminum alloy, comprising the steps of:

[0042] (1) Surface pretreatment: use 5A70 aluminum alloy as the substrate, seal the area other than the working surface of the aluminum alloy substrate with epoxy resin, polish the working surface of the aluminum alloy substrate with SiC sandpaper, and use anhydrous Ethanol and deionized water were used to clean the substrate surface.

[0043] (2) Configure micro-arc oxidation electrolyte: use deionized water to prepare 20g / L sodium silicate, 3g / L potassium hydroxide, and 4g / L sodium hexametaphosphate to form a silicate system electrolyte, stir for 1min and then ultrasonically oscillate 2min, and then stand still for 10h to obtain the micro-arc oxidation electrolyte.

[0044] (3) Micro-arc oxidation: put the aluminum alloy substrate after surface pretreatment into the micro-arc oxidation electrolyte, use the aluminum alloy substrate as the anode, and the micro-arc o...

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Abstract

The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy surface micro-arc oxidation treatment technology. The technology comprises the following steps that surface pretreatment is performed; a micro-arc oxidation electrolyte is prepared; micro-arc oxidation is performed; modification treatment is performed on SiO2 nano particles; and a super-hydrophobic coating is prepared. According to the technology, the surface of the aluminum alloy is treated through micro-arc oxidation, the micro-arc oxidation coating with good stability and functionality is favorably constructed, the modified SiO2 nano particles are soaked in the surface of the aluminum alloy micro-arc oxidation coating, part of air can be sealed in a porous structure of the micro-arc oxidation coating to form an effective air cushion, regular granular bulges are formed outside the aluminum alloy, the surface roughness is increased, the super-hydrophobic coating is formed, and the corrosion resistance of the aluminum alloy is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to a micro-arc oxidation treatment process for the surface of aluminum alloy. Background technique [0002] Aluminum alloy has good seawater corrosion resistance, low density, high specific strength, easy processing and forming, weldable and non-magnetic. In the shipbuilding industry, it can effectively reduce the weight of ships, improve stability and reduce energy consumption. However, due to the poor hydrophobicity of the aluminum alloy in the marine environment, the aluminum alloy is easy to crack and corrode. In practical applications, the use of surface modification technology is one of the effective ways to improve the comprehensive performance of aluminum and aluminum alloys. There are many traditional surface treatment methods for aluminum and aluminum alloys. According to different processes, they can be divided into anti-corrosion treatments such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06C25D11/24
CPCC25D11/026C25D11/024C25D11/06C25D11/24C25D11/246
Inventor 王呈刚赵书锋郭艳平赵新颖李珊珊蔡文宗卜建磊
Owner SHANDONG YUHANG SPECIAL ALLOY EQUIP
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