A kind of preparation method of anticorrosion aluminum profile

A technology of aluminum profiles and anti-corrosion coatings, applied in anti-corrosion coatings, coatings, etc., can solve the problems of poor stability of chromizing solution, poor adhesion, poor corrosion resistance of chromizing film, etc., and achieve good anti-corrosion effect and strong adhesion Effect

Active Publication Date: 2016-08-17
FUJIAN MINFA ALUMINUM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, wear resistance, good appearance decoration and long service life. , the surface chemical treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. At present, my country basically adopts the method of chromate conversion treatment, which requires the use of chromium Chemical substances, serious pollution to the environment, high cost of wastewater treatment, poor stability of chromating solution, easy to become turbid solution, more sediment, easy to hang dust on the surface of workpiece, poor corrosion resistance and poor adhesion of chromizing film
There are also a few chromium-free treatment solutions for surface chemical treatment, but these chromium-free treatment solutions generally use potassium ferricyanide as an accelerator, and ferricyanide will be decomposed into toxic cyanide under the influence of external light

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] A method for preparing an anti-corrosion aluminum profile, including degreasing, water washing, anodizing, spraying, and curing treatment. After the anodizing and before spraying, surface chemical treatment is also carried out. The specific process steps of the surface chemical treatment are: preparing chemical treatment solution, put the anodized aluminum profile workpiece into a chemical treatment solution for 3 minutes, dry it, and obtain an aluminum profile workpiece with a protective layer. The chemical treatment solution contains: sodium fluoride 0.2g / L, ammonium hydrofluoride 0.4g / L, potassium permanganate 0.1g / L, nitrate 0.1g / L, praseodymium chloride 0.2g / L; then spray a layer of anti-corrosion coating on the aluminum profile workpiece with protective layer, spray for 1.0min, The spray pressure is 0.05MPa, and the anticorrosion coating includes the following raw materials in parts by weight: 21 parts by weight of polyvinylidene fluoride, 80 parts by weight of dim...

Embodiment 2

[0014] A method for preparing an anti-corrosion aluminum profile, including degreasing, water washing, anodizing, spraying, and curing treatment. After the anodizing and before spraying, surface chemical treatment is also carried out. The specific process steps of the surface chemical treatment are: preparing chemical treatment solution, put the anodized aluminum profile workpiece into the chemical treatment solution for immersion for 4 minutes, and dry to obtain the aluminum profile workpiece with a protective layer. The chemical treatment solution contains: sodium fluoride 0.25g / L, ammonium hydrofluoride 0.5g / L, potassium permanganate 0.1g / L, nitrate 0.12g / L, praseodymium chloride 0.25g / L; then spray a layer of anti-corrosion coating on the aluminum profile workpiece with protective layer, spray 1.0~2.0 min, the spray pressure is 0.05-0.07MPa, and the anti-corrosion coating includes the following raw materials in parts by weight: 27 parts by weight of polyvinylidene fluoride,...

Embodiment 3

[0016] A method for preparing an anti-corrosion aluminum profile, including degreasing, water washing, anodizing, spraying, and curing treatment. After the anodizing and before spraying, surface chemical treatment is also carried out. The specific process steps of the surface chemical treatment are: preparing chemical treatment solution, put the anodized aluminum profile workpiece into the chemical treatment solution for 5 minutes, dry it, and obtain the aluminum profile workpiece with a protective layer. The chemical treatment solution contains: sodium fluoride 0.3g / L, ammonium hydrofluoride 0.6g / L, potassium permanganate 0.15g / L, nitrate 0.13g / L, praseodymium chloride 0.3g / L; then spray a layer of anti-corrosion coating on the aluminum profile workpiece with protective layer, spray for 2.0min, The spray pressure is 0.07MPa, and the anticorrosion coating includes the following raw materials in parts by weight: 35 parts by weight of polyvinylidene fluoride, 90 parts by weight o...

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Abstract

The invention relates to the field of preparation methods of aluminum profiles, and provides a method for preparing anti-corrosion aluminum profiles with good corrosion resistance, strong adhesion, no toxic substances, and no environmental pollution, including degreasing, washing, anodizing, spraying, and curing Surface chemical treatment is carried out after the anodic oxidation and before spraying. The specific process steps of the surface chemical treatment are: preparing a chemical treatment solution, and immersing the anodized aluminum profile workpiece in the chemical treatment solution for 3 to 5 minutes , drying to obtain an aluminum profile workpiece with a protective layer, and then spray a layer of anti-corrosion coating on the aluminum profile workpiece with a protective layer for 1.0-2.0 minutes, and the spray pressure is 0.05-0.07Mpa.

Description

technical field [0001] The invention relates to the field of preparation methods of aluminum profiles, in particular to a preparation method of anti-corrosion aluminum profiles. Background technique [0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, wear resistance, good appearance decoration and long service life. , the surface chemical treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. At present, my country basically adopts the method of chromate conversion treatment, which requires the use of chromium Chemical substances, serious pollution to the environment, high waste water treatment costs, poor stability of chromating solution, easy to become turbid solution, more sediment, easy to hang dust on the surface of the workpiece, poor corrosion resistance and poor adhesion of the chromizing film. There are also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/24C09D127/16C09D7/12C09D5/08
Inventor 黄长远叶细发
Owner FUJIAN MINFA ALUMINUM
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