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Copper salt electrolytic coloring method for aluminum alloy profile

An aluminum alloy profile, electrolytic coloring technology, applied in the direction of electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of poor corrosion resistance, easy fading and uneven color of the colored film.

Pending Publication Date: 2022-07-29
FUJIAN MINFA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, in view of the above content, the present invention adopts a new technical solution to provide a copper salt electrolytic coloring method for aluminum alloy profiles, which solves the problems of poor corrosion resistance, uneven film color, and easy fading problem

Method used

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  • Copper salt electrolytic coloring method for aluminum alloy profile

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Embodiment 1

[0024] A method for electrolytic coloring of copper salts of aluminum alloy profiles, comprising degreasing, water washing, alkali etching, water washing, neutralization, water washing, anodizing, water washing, water washing, electrolytic coloring, water washing, water washing, hole sealing and water washing treatment processes, the The composition and weight percentage in the aluminum alloy are: Si0.5~0.7%, Mg0.6~0.8%, Fe0.2~0.28%, Cu≤0.1%, Mn≤0.1%, Zn≤0.1%, Ti≤0.1% , Cr≤0.1%, La0.02~0.05%, Be0.1~0.3%, Ta0.05~0.1%, the rest are Al and inevitable impurities.

[0025] Wherein, the degreasing process includes primary degreasing and secondary degreasing. The primary degreasing is to immerse the aluminum profile in acetone solvent, control the temperature at 35°C, start the ultrasonic oscillator at the same time, and take it out after immersion for 6 minutes; The secondary degreasing is to dip the aluminum profile into a degreasing liquid composed of 30g / L sulfuric acid, 60g / L ph...

Embodiment 2

[0030] A method for electrolytic coloring of copper salts of aluminum alloy profiles, comprising degreasing, water washing, alkali etching, water washing, neutralization, water washing, anodizing, water washing, water washing, electrolytic coloring, water washing, water washing, hole sealing and water washing treatment processes,

[0031] Wherein, the degreasing process includes primary degreasing and secondary degreasing. The primary degreasing is to immerse the aluminum profile in acetone solvent, control the temperature at 40°C, start the ultrasonic oscillator at the same time, and take it out after immersion for 5 minutes; The secondary degreasing is to dip the aluminum profile into a degreasing liquid composed of 40g / L sulfuric acid, 75g / L phosphoric acid, 0.9 / L fatty acid methyl ester ethoxylate, and 1.4g / L coconut oil fatty acid Take it out after 5 minutes;

[0032] The alkaline solution used in the alkaline etching process is prepared from 80g / L of sodium hydroxide, 3g...

Embodiment 3

[0036] A method for electrolytic coloring of copper salts of aluminum alloy profiles, comprising degreasing, water washing, alkali etching, water washing, neutralization, water washing, anodizing, water washing, water washing, electrolytic coloring, water washing, water washing, hole sealing and water washing treatment processes,

[0037] Wherein, the degreasing process includes primary degreasing and secondary degreasing. The primary degreasing is to immerse the aluminum profile in acetone solvent, control the temperature at 45°C, start the ultrasonic oscillator at the same time, and take it out after immersion for 3 minutes; The secondary degreasing is to dip the aluminum profile into a degreasing liquid composed of 50g / L sulfuric acid, 90g / L phosphoric acid, 1.2g / L fatty acid methyl ester ethoxylate, and 1.8g / L coconut oil fatty acid diethanolamide, Take out after immersion for 3 minutes;

[0038] The alkaline solution used in the alkaline etching process is prepared from 9...

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Abstract

The invention relates to the field of aluminum profile surface treatment, provides a copper salt electrolytic coloring method for an aluminum alloy profile, and solves the problems that a coloring film layer generated by adopting a copper salt system for an existing aluminum profile is poor in corrosion resistance, non-uniform in film color and easy to fade. Comprising the treatment procedures of oil removal, water washing, alkali corrosion, water washing, neutralization, water washing, anodic oxidation, water washing, water washing, electrolytic coloring, water washing, water washing, hole sealing and water washing, and bath liquor adopted in the anodic oxidation process comprises sulfuric acid with the concentration being 160-180 g / L, acetic acid with the concentration being 12-18 g / L, aluminum sulfate with the concentration being 12-18 g / L and sodium dodecyl benzene sulfonate with the concentration being 1-3 g / L; a coloring solution adopted in the electrolytic coloring process comprises sulfuric acid with the concentration of 15-20 g / L, aluminum dihydrogen phosphate with the concentration of 6-9 g / L, succinic acid with the concentration of 8-12 g / L, copper sulfate with the concentration of 12-15 g / L and ferric sulfate with the concentration of 4-6 g / L.

Description

technical field [0001] The invention relates to the technical field of surface treatment of aluminum profiles, in particular to a copper salt electrolytic coloring method for aluminum alloy profiles. Background technique [0002] Aluminum and its alloys are one of the most widely distributed metals in nature. They are widely used in electronics, aviation, chemical and areas of daily life. The original color of aluminum alloy is relatively single, which cannot meet the needs of diversified colors in applications. At the same time, aluminum alloy also has the disadvantage of being easily corroded. Coloring treatment can improve the corrosion resistance of aluminum alloys and enhance its decorative effect. [0003] There are many aluminum alloy coloring methods commonly used in industry. According to the different positions of the colorant particles in the pores of the film layer, they can be basically divided into three types: natural coloring method, electrolytic coloring m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/14C25D11/08C25D11/10C25D11/16C25D11/24C22C21/02C22C21/08
CPCC25D11/14C25D11/08C25D11/10C25D11/16C25D11/246C22C21/02C22C21/08
Inventor 黄长远叶细发
Owner FUJIAN MINFA ALUMINUM
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