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Aluminum plate anodic oxidation liquid

An anodizing and aluminum plate technology, applied in anodizing and other directions, can solve the problems of poor anodizing effect of aluminum plate, local holes in the film layer, reducing the protective performance of the oxide film, etc., to improve the film forming speed and process temperature, pore and thickness uniformity , the effect of excellent coloring effect

Inactive Publication Date: 2021-02-19
TIANCHANG JINGFA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the anodic oxidation of aluminum plates is oxidized by ordinary sulfuric acid anodic oxidation process. The anodic oxidation effect of aluminum plates is poor, the film forming speed is slow, and the density, uniformity and gloss of the oxide film are poor, especially the gloss is low. It affects the purity of the subsequent dyeing, so that the aluminum plate cannot be used for surface decoration; and the ordinary sulfuric acid anodizing process is likely to cause local current concentration of the aluminum plate during the anodizing process, forming local hole defects in the film layer, and reducing the protective performance of the oxide film

Method used

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  • Aluminum plate anodic oxidation liquid

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Experimental program
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Effect test

Embodiment 1

[0020] The concentration of each raw material in the aluminum plate anodizing solution is: sulfuric acid 145g / L, organic acid salt 7g / L, metaaluminate 3g / L, phosphate 4g / L, sodium molybdate 4g / L, aluminum powder 2g / L , complexing agent 2g / L, corrosion inhibitor 2g / L, active agent oxidizing agent 0.8g / L.

[0021] The organic acid salt is sodium lactate.

[0022] The complexing agent is diethanolamine.

[0023] The corrosion inhibitor is glycerol.

[0024] The active agent oxidizing agent is potassium fluoroborate.

[0025] The preparation method of the aluminum plate anodic oxidation solution is to add sulfuric acid, organic acid salt, metaaluminate, phosphate, sodium molybdate, aluminum powder, complexing agent, corrosion inhibitor and active agent oxidant into deionized water in proportion, and stir Made evenly.

Embodiment 2

[0027] The concentration of each raw material in the aluminum plate anodizing solution is: sulfuric acid 140g / L, organic acid salt 5g / L, metaaluminate 1g / L, phosphate 2g / L, sodium molybdate 2g / L, aluminum powder 1g / L , complexing agent 1g / L, corrosion inhibitor 1g / L, active agent oxidizing agent 0.5g / L.

[0028] The organic acid salt is one or more of sodium lactate, sodium tartrate, sodium citrate and sodium malate.

[0029] The complexing agent is triethanolamine.

[0030] The corrosion inhibitor is glycerol.

[0031] The active agent oxidizing agent is potassium fluoroaluminate.

[0032] The preparation method of the aluminum plate anodic oxidation solution is to add sulfuric acid, organic acid salt, metaaluminate, phosphate, sodium molybdate, aluminum powder, complexing agent, corrosion inhibitor and active agent oxidant into deionized water in proportion, and stir Made evenly.

Embodiment 3

[0034] The concentration of each raw material in the aluminum plate anodizing solution is: sulfuric acid 150g / L, organic acid salt 10g / L, metaaluminate 5g / L, phosphate 5g / L, sodium molybdate 5g / L, aluminum powder 3g / L , complexing agent 3g / L, corrosion inhibitor 3g / L, active agent oxidizing agent 1g / L.

[0035] The organic acid salt is sodium tartrate.

[0036] The complexing agent is diethanolamine and triethanolamine, and the mass ratio of diethanolamine and triethanolamine is 1:1.

[0037] The corrosion inhibitor is glycerol.

[0038] The active agent oxidizing agent is potassium fluoroborate.

[0039] The preparation method of the aluminum plate anodic oxidation solution is to add sulfuric acid, organic acid salt, metaaluminate, phosphate, sodium molybdate, aluminum powder, complexing agent, corrosion inhibitor and active agent oxidant into deionized water in proportion, and stir Made evenly.

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Abstract

The invention relates to an aluminum plate anodic oxidation liquid. The aluminum plate anodic oxidation liquid comprises the following raw materials of, according to the concentration content, 140-150g / L of sulfuric acid, 5-10 g / L of organic acid salt, 1-5 g / L of meta-aluminate, 2-5 g / L of phosphate, 2-5 g / L of sodium molybdate, 1-3 g / L of aluminum powder, 1-3g / L of complexing agent, 1-3g / L of corrosion inhibitor and 0.5-1 g / L of active agent oxidant. According to the aluminum plate anodic oxidation liquid, on the basis of a traditional sulfuric acid anodic oxidation process, trace amounts ofthe organic acid salt, the meta-aluminate, the phosphate, the sodium molybdate, the aluminum powder, the complexing agent, the corrosion inhibitor and the active agent oxidant are added into a sulfuric acid oxidation liquid so that the compactness, the uniformity and the glossiness of an aluminum alloy oxidation film can be improved; and compared with a traditional sulfuric acid anodic oxide film, the anodic oxide film is more compact and uniform in pore and thickness, has excellent coloring effect, strength, wear resistance and corrosion resistance, and meets the surface treatment and use requirements of an aluminum plate.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum plate anodic oxidation solution. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of industrial economy, the demand for aluminum alloy structural parts is increasing day by day. Normally, a layer of natural oxide film is formed on the surface of aluminum alloy, but the natural oxide film of aluminum alloy is very thin and soft, which is easily damaged and loses its protective effect. In order to improve the wear resistance, corrosion resistance and decorative properties of aluminum alloys, aluminum alloys are usually anodized to form a dense porous oxide film on the surface, which can improve the hardness, wear resistance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08
CPCC25D11/08
Inventor 林士兵朱良科
Owner TIANCHANG JINGFA ALUMINUM IND