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Protection method applied to aluminum alloy in vanadium battery solution

An aluminum alloy and electrolyte technology, which is applied to the device, coating, and pretreatment surface of the surface coating liquid to achieve the effect of good corrosion resistance and controllable coating thickness

Inactive Publication Date: 2013-12-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a protective method for aluminum alloys in the electrolyte of vanadium batteries, using inorganic / organic composite coatings, in view of the fact that the current surface treatment cannot meet the application of aluminum alloys in strong acid and strong oxidation vanadium redox flow batteries. Layer protection system, thus solving the practical application of aluminum alloy in the vanadium battery electrolyte, and ensuring a good bonding force between the coating systems, between the system and the substrate, and not affecting the normal operation of the vanadium redox flow battery Under this condition, the strong acid resistance and strong oxidation resistance of the coating are greatly improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, prepare the sample, degrease the aluminum alloy (150mm×70mm×2mm) in an alkaline degreasing solution, then wash it with a large amount of water, then remove the scale in an acidic solution, wash it with a large amount of water and dry it, and wash it with alcohol Wipe the aluminum alloy surface clean.

[0031] The degreasing liquid is composed of sodium carbonate, trisodium phosphate, sodium silicate and OP-10 emulsifier. The content of each component is as follows:

[0032] Sodium carbonate 25g / L; trisodium phosphate 30g / L; sodium silicate 10g / L; OP-10 emulsifier 2g / L; the rest is water.

[0033] The deoxidizing skin solution is made by mixing hydrofluoric acid and nitric acid, and the content of each component is as follows:

[0034] Hydrofluoric acid 7g / L; nitric acid 25g / L; the rest is water;

[0035] Then apply a layer of ceramic coating on the aluminum alloy surface, cure at room temperature for 24 hours, and have a thickness of 40 μm; then apply a layer o...

Embodiment 2

[0040] First, prepare the sample, degrease the aluminum alloy (150mm×70mm×2mm) in an alkaline degreasing solution, then wash it with a large amount of water, then remove the scale in an acidic solution, wash it with a large amount of water and dry it, and wash it with alcohol Wipe the aluminum alloy surface clean.

[0041] The degreasing liquid is composed of sodium carbonate, trisodium phosphate, sodium silicate and OP-10 emulsifier. The content of each component is as follows:

[0042] Sodium carbonate 25g / L; trisodium phosphate 30g / L; sodium silicate 10g / L; OP-10 emulsifier 2g / L; the rest is water.

[0043] The deoxidizing skin solution is made by mixing hydrofluoric acid and nitric acid, and the content of each component is as follows:

[0044] Hydrofluoric acid 7g / L; nitric acid 25g / L; the rest is water;

[0045] Then a layer of ceramic coating was applied on the surface of the aluminum alloy, cured at room temperature for 24 hours, with a thickness of 30 μm; another la...

Embodiment 3

[0050] First, prepare the sample, degrease the aluminum alloy (150mm × 70mm × 2mm) in an alkaline degreasing solution, then wash it with a large amount of water, then remove the scale in an acidic solution, wash it with a large amount of water and dry it, and then wash it with alcohol Wipe the aluminum alloy surface clean.

[0051] The degreasing liquid is composed of sodium carbonate, trisodium phosphate, sodium silicate and OP-10 emulsifier. The content of each component is as follows:

[0052] Sodium carbonate 25g / L; trisodium phosphate 30g / L; sodium silicate 10g / L; OP-10 emulsifier 2g / L; the rest is water.

[0053] The deoxidizing skin solution is made by mixing hydrofluoric acid and nitric acid, and the content of each component is as follows:

[0054] Hydrofluoric acid 7g / L; nitric acid 25g / L; the rest is water;

[0055] Then a layer of ceramic coating was applied on the surface of the aluminum alloy, cured at room temperature for 24 hours, with a thickness of 35 μm; a...

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Abstract

The invention relates to a surface protection technology for an aluminum alloy material, in particular to a protection method applied to an aluminum alloy in a vanadium battery solution. Firstly, the aluminum alloy is unoiled and descaled; then a layer of super-corrosion-resistance and acid-and-alkaline resistant ceramic coating is coated on the surface of the aluminum alloy, the coating is cured at the room temperature for 20-30 hours to form a ceramic coating layer whose thickness if 10-70um; and then a layer of nano modified organic coating is further coated and cured to form an organic coating layer whose thickness is 7-50um. The protection method aims at the problem that the current aluminum alloy is seriously corroded in the vanadium battery solution and certain protection technology cannot meet the use requirements of the aluminum alloy in strong acid, strong alkaline and oxidized environments. The organic / inorganic composite coating layer is used to protect the surface of the aluminum alloy, so that the practical application problems of the aluminum alloy in the vanadium battery solution are solved.

Description

technical field [0001] The invention relates to the surface protection technology of aluminum alloy materials, in particular to a protection method applied to the aluminum alloy in the electrolyte solution of vanadium batteries. Background technique [0002] Aluminum is one of the six most widely distributed metals on the earth, and has many excellent properties: its specific gravity is low; high mechanical strength can be obtained after proper alloying and heat treatment; pure metal aluminum has high resistance corrosion. In addition, aluminum has excellent electrical conductivity, thermal conductivity, and reflectivity; its ductility is strong, so processing costs are low; aluminum is non-magnetic, has high waste recycling value, and its corrosion products are non-toxic and colorless. Therefore, it is widely used in transportation, packaging containers, aerospace, machinery manufacturing, household appliances, architectural decoration, electronic communications, etc., and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D3/10B05D3/02C23D5/02C04B26/06C04B26/16C04B26/32C09D163/00C09D175/04C09D133/00C09D127/12C09D127/18C09D7/12
Inventor 李庆鹏刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI