Surface treatment process for aluminum alloy sections before coloring

A technology of aluminum alloy profiles and processing technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problems affecting the uniformity of aluminum alloy color, the surface of aluminum parts loses luster, and weak corrosion resistance. Achieve the effects of high surface friction coefficient, convenient coloring treatment and strong adhesion

Active Publication Date: 2016-11-23
ANHUI HENGXING DECORATION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of processing aluminum alloy, it is easy to form an extremely thin layer of aluminum oxide film with certain corrosion resistance on the surface of aluminum alloy, but because this oxide film has an amorphous structure, it will cause the surface of the aluminum part to lose its original luster. luster
In addition, this kind of oxide film is loose, porous, uneven, weak in corrosion resistance, easy to be stained, and affects the uniformity of color in the subsequent coloring process of aluminum alloy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A process for surface treatment of an aluminum alloy profile before coloring, comprising the following steps:

[0025] (1) Cleaning: After the aluminum alloy profile is dipped in gasoline, add 36g / l of sodium dodecylbenzenesulfonate, 24g / l of fatty alcohol polyoxyethylene ether, 6g / l of triethanolamine, and 2g of nonionic surfactant / l and corrosion inhibitor 2g / l mixed solution, the cleaning temperature is 42℃;

[0026] (2) mechanical grinding and polishing;

[0027] (3) Ultrasonic degreasing treatment: adopt 8 parts of coconut oil alkanolamides, 25 parts of polyoxyethylene fatty alcohol ether vulcanization, and the mixture of 2 parts of self-defoaming emulsifiers is a degreasing agent; Pre-degreasing and main degreasing of aluminum alloy profiles, the operation time of pre-degreasing and main degreasing is 5 minutes;

[0028] (4) Alkali corrosion;

[0029] (5) Primary anodic oxidation: put the aluminum alloy profile after alkali etching into the acid solution tank ...

Embodiment 2

[0034] A process for surface treatment of an aluminum alloy profile before coloring, comprising the following steps:

[0035] (1) Cleaning: After the aluminum alloy profile is dipped in gasoline, put 25g / l of sodium dodecylbenzenesulfonate, 32g / l of fatty alcohol polyoxyethylene ether, 5g / l of triethanolamine, and 3g of nonionic surfactant / l and corrosion inhibitor 1g / l mixed solution, the cleaning temperature is 55℃;

[0036] (2) mechanical grinding and polishing;

[0037] (3) Ultrasonic degreasing treatment: adopt 5 parts of coconut oil alkyl alcohol amide, 30 parts of polyoxyethylene fatty alcohol ether vulcanization, and the mixture of 1 part of self-defoaming emulsifier is degreasing agent; Pre-degreasing and main degreasing of aluminum alloy profiles, the operation time of pre-degreasing and main degreasing is 6 minutes;

[0038] (4) Alkali corrosion;

[0039] (5) Primary anodic oxidation: put the aluminum alloy profile after alkali etching into the acid solution tan...

Embodiment 3

[0044] A process for surface treatment of an aluminum alloy profile before coloring, comprising the following steps:

[0045] (1) Cleaning: After the aluminum alloy profile is dipped in gasoline, add 42g / l of sodium dodecylbenzenesulfonate, 20g / l of fatty alcohol polyoxyethylene ether, 8g / l of triethanolamine, and 1g of nonionic surfactant / l and corrosion inhibitor 3g / l mixed solution, the cleaning temperature is 35℃;

[0046] (2) mechanical grinding and polishing;

[0047] (3) Ultrasonic degreasing treatment: adopt 12 parts of coconut oil alkanolamides, 22 parts of polyoxyethylene fatty alcohol ether vulcanization, and the mixture of 3 parts of self-defoaming emulsifiers is a degreasing agent; Pre-degreasing and main degreasing of aluminum alloy profiles, the operation time of pre-degreasing and main degreasing is 4 minutes;

[0048] (4) Alkali corrosion;

[0049] (5) Primary anodic oxidation: put the aluminum alloy profile after alkali etching into the acid solution tank...

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PUM

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Abstract

The invention relates to the technical field of aluminum alloy surface treatment, in particular to a surface treatment process for aluminum alloy sections before coloring. The process includes the following steps of cleaning, mechanical lapping and polishing, ultrasonic ungrease treatment, alkaline etching, primary anodic oxidation, activation, wire-drawing treatment and secondary anodic oxidation. By means of the surface treatment process before coloring, the surface friction coefficient of the aluminum alloy sections can be effectively increased, surface adhesive force is enhanced, and therefore subsequent coloring treatment can be facilitated.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to a surface treatment process of an aluminum alloy profile before coloring. Background technique [0002] Due to the characteristics of low density, high strength and rigidity, good thermal conductivity, and excellent casting and processing performance, aluminum alloy profiles are more and more widely used in various industries, especially in the door and window industry. The finished doors and windows have good performance. [0003] In the process of processing aluminum alloy, it is easy to form an extremely thin layer of aluminum oxide film with certain corrosion resistance on the surface of aluminum alloy, but because this oxide film has an amorphous structure, it will cause the surface of the aluminum part to lose its original luster. luster. In addition, this kind of oxide film is loose, porous, uneven, weak in corrosion resistance, easy to be staine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12C25D11/16C23G1/24C23F17/00
CPCC23F17/00C23G1/24C25D11/12C25D11/16
Inventor 汪滔沈华福黄宁燕
Owner ANHUI HENGXING DECORATION ENG CO LTD
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