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Environment-friendly aluminum alloy chemical oxidation liquid and chemical oxidation method

A chemical oxidation and aluminum alloy technology, applied in the direction of metal material coating process, etc., can solve the problems of poor corrosion resistance of the film layer, and achieve the effects of good corrosion resistance, easy availability of raw materials, and simple pretreatment process.

Active Publication Date: 2021-07-13
NANCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems such as the poor corrosion resistance of the film layer in the above-mentioned aluminum alloy chemical oxidation process on the basis and premise of environmental protection and energy saving, the present invention provides an aluminum alloy chemical oxidation solution and its chemical oxidation method

Method used

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  • Environment-friendly aluminum alloy chemical oxidation liquid and chemical oxidation method
  • Environment-friendly aluminum alloy chemical oxidation liquid and chemical oxidation method
  • Environment-friendly aluminum alloy chemical oxidation liquid and chemical oxidation method

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Experimental program
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Effect test

Embodiment 1

[0031] The composition formula of the aluminum alloy chemical oxidation solution is as follows: the concentration of basic chromium sulfate is 1.5g / L, the concentration of chromium nitrate is 0.3 g / L, the concentration of ammonium fluozirconate is 10g / L, the concentration of potassium fluozirconate is 2g / L, poly The concentration of maleic acid is 0.2 g / L, the concentration of maleic acid-acrylic acid copolymer is 0.3 g / L, and the concentration of sodium lauryl sulfate is 0.01 g / L.

[0032] The concentrations of sodium phosphate, sodium silicate, sodium dihydrogen phosphate and sodium alkylbenzene sulfonate in the oil removal solution were 50 g / L, 1.0 g / L, 20 g / L and 1.0 g / L, respectively. Chromic anhydride, HNO in deoxidizing solution 3 and HF concentration were 50g / L, 10wt% and 1.0wt%.

[0033] Aluminum Alloy Chemical Oxidation Process: Oxidize the aluminum alloy of model 2024-T3.

[0034] Step 1: Put the aluminum alloy in a degreasing solution to remove oil, control the t...

Embodiment 2

[0038] In the aluminum alloy chemical oxidation solution: the concentration of basic chromium sulfate is 1.6g / L, the concentration of potassium fluozirconate is 8g / L, the concentration of sodium fluozirconate is 3g / L, the concentration of lactic acid is 0.1g / L, and the concentration of polymaleic acid The concentration is 0.5g / L, and the concentration of sodium lauryl sulfate is 0.05g / L.

[0039] Aluminum Alloy Chemical Oxidation Process: Oxidation treatment is carried out on the type 1060 aluminum alloy.

[0040] Step 1: Put the aluminum alloy in a degreasing solution to remove oil, control the temperature at 60°C, and take 4 minutes;

[0041] Step 2: Put the aluminum alloy in a deoxidizing solution for deoxidation treatment, and deoxidize at room temperature for 2 minutes;

[0042] Step 3: Clean the aluminum alloy with pure water and perform chemical oxidation. The temperature of the chemical oxidation solution is 37°C, the pH value is 3.8, and the oxidation time is 4 minutes...

Embodiment 3

[0044] In the aluminum alloy chemical oxidation solution: the concentration of basic chromium sulfate is 0.5g / L, the concentration of ammonium fluorozirconate is 5g / L, the concentration of sodium fluorozirconate is 5g / L, the concentration of lactic acid is 0.3g / L, polymaleic acid The concentration is 0.3g / L, and the concentration of sodium lauryl sulfate is 0.05g / L.

[0045] Aluminum Alloy Chemical Oxidation Process: Oxidation treatment is carried out on the type 6063 aluminum alloy.

[0046] Step 1: Put the aluminum alloy in a degreasing solution to remove oil, control the temperature at 60°C, and take 5 minutes;

[0047] Step 2: Put the aluminum alloy in a deoxidizing solution for deoxidation treatment, and deoxidize at room temperature for 3 minutes;

[0048] Step 3: Clean the aluminum alloy with pure water and perform chemical oxidation. The temperature of the chemical oxidation solution is 39° C., the pH value is 3.9, and the oxidation time is 4 minutes. After the chemic...

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Abstract

The invention relates to an environment-friendly aluminum alloy chemical oxidation liquid and a chemical oxidation method. The chemical oxidation liquid is composed of zirconium salt, trivalent chromium salt, organic acid and a surfactant, the concentration of the trivalent chromium salt is 0.3-3 g / L, the concentration of the zirconium salt is 2-20 g / L, the concentration of the organic acid is 0.1-1 g / L, and the concentration of the surfactant is 0.005-0.1 g / L. The chemical oxidation method comprises the steps of oil removal, deoxidation treatment and chemical oxidation. The chemical oxidation liquid does not contain hexavalent chromium and is beneficial to the health of operators and the environment, and a conversion film subjected to chemical oxidation treatment is excellent in corrosion resistance and is firmly combined with a paint film.

Description

technical field [0001] The invention relates to an environment-friendly aluminum alloy chemical oxidation solution and a chemical oxidation method, specifically belonging to the technical field of aluminum and aluminum alloy surface processing. Background technique [0002] Aluminum alloy is light in weight, has strong electrical and thermal conductivity, high mechanical strength, good casting performance and plastic processing performance, and is widely used in aerospace, transportation and other fields. However, the disadvantage of aluminum alloy is that it is chemically active and prone to corrosion. Therefore, it is generally oxidized before it is put into production to improve its corrosion resistance. At present, the commonly used aluminum alloy oxidation treatment methods include anodic oxidation and chemical oxidation. Among them, the chemical oxidation method has the advantages of simple equipment, convenient operation, high production efficiency, no power consumpt...

Claims

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Application Information

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IPC IPC(8): C23C22/56C23C22/77C23C22/78
CPCC23C22/56C23C22/77C23C22/78
Inventor 王夏妍黄小文王梅丰
Owner NANCHANG UNIV
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