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An aluminum profile oxidation coloring process

An aluminum profile oxidation and process technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., to achieve the effects of high gloss, low dark pattern rate, and uniform coloring

Active Publication Date: 2017-09-15
ZHEJIANG XINXIANG NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an oxidation electrolytic coloring process for aluminum profiles. It is fully optimized from the oxidation treatment solution to the process parameters. It is unexpectedly found that under the optimized parameters, it can produce products that are not easy to fade, corrosion-resistant, and have uniform coloring without darkening. spots, high-gloss aluminum profiles, such a process has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 7001 aluminum profile electrolytic coloring process:

[0028] (1) Degreasing:

[0029] The degreasing process is: 18g / L alkaline degreasing agent, pH = 8, temperature 65°C, time 10min;

[0030] (2) Wash with water after removing the oxide film on the surface of the aluminum alloy parts with an acidic solution;

[0031] (3) Oxidation in an oxidation treatment solution containing 0.08 g / L of EDTA, 0.05 g / L of sodium sulfate, 0.2 g / L of sodium aluminate, and 1.0 g / L of sodium fluoride in the oxidation solution, and adjusting the pH to 1.5, with 18-19V voltage, treatment temperature 15-17 ℃, treatment 6min;

[0032] (4) Water washing: 2 times of water washing, the pH of water washing is 1.1 and 1.0 respectively, the time is 10s and 20s respectively, and the conductivity is 120ms / m;

[0033] (5) Electrolytic coloring, the process parameters are:

[0034] NiSO 4 ·6H 2 O 150 g / L

[0035] h 3 BO 3 38g / L

[0036] EDTA0.06g / L

[0037] pH 4.5

[0038] temperature 25 ...

Embodiment 2

[0046] 7009 aluminum profile electrolytic coloring process:

[0047] (1) Degreasing:

[0048] The degreasing process is: 18g / L alkaline degreasing agent, pH = 8, temperature 65°C, time 12 min;

[0049] (2) Wash with water after removing the oxide film on the surface of the aluminum alloy parts with an acidic solution;

[0050] (3) Oxidation in an oxidation treatment solution containing 0.06 g / L of EDTA, 0.05 g / L of sodium sulfate, 0.2 g / L of sodium aluminate, and 1.0 g / L of sodium fluoride in the oxidation solution, and adjusting the pH to 1.5, use 19V voltage, treatment temperature 17℃, treatment 8min;

[0051] (4) Water washing: 2 times of water washing, the pH of water washing is 1.1 and 1.0 respectively, the time is 10s and 20s respectively, and the conductivity is 120ms / m;

[0052] (5) Electrolytic coloring, the process parameters are:

[0053] NiSO 4 ·6H 2 O 150 g / L

[0054] h 3 BO 3 42g / L

[0055] EDTA0.06g / L

[0056] pH 4.5

[0057] temperature 25 ℃

[0...

Embodiment 3

[0065] 2001 Aluminum profile electrolytic coloring process:

[0066] (1) Degreasing:

[0067] The degreasing process is: 18g / L alkaline degreasing agent, pH = 8, temperature 65°C, time 10-15 min;

[0068] (2) Wash with water after removing the oxide film on the surface of the aluminum alloy parts with an acidic solution;

[0069] (3) Oxidation in the oxidation treatment solution, containing EDTA 0.05g / L, sodium sulfate 0.05g / L, sodium aluminate 0.2g / L, sodium fluoride 1.0g / L in the said oxidation solution, adjust the pH to 1.5, use 18V voltage, treatment temperature 15℃, treatment 6min;

[0070](4) Water washing: 2 times of water washing, the pH of water washing is 1.1 and 1.0 respectively, the time is 10s and 20s respectively, and the conductivity is 120ms / m;

[0071] (5) Electrolytic coloring, the process parameters are:

[0072] NiSO 4 ·6H 2 O 140g / L

[0073] h 3 BO 3 38g / L

[0074] EDTA0.06g / L

[0075] pH 4.5

[0076] temperature 22 ℃

[0077] Voltage 16V

...

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Abstract

The invention discloses a novel aluminum profile oxidization and coloring method. The novel aluminum profile oxidization and coloring method comprises the first step of oil removing, the second step of adopting an acid solution to remove an oxidation film on the surface of an aluminum alloy workpiece and then carrying out washing, the third step of carrying out oxidation in an oxidation processing solution, the fourth step of washing, the fifth step of electrolytic coloring and the sixth step of adopting an OY-61 aluminum chemical oxidation sealing agent to carry out sealing treatment. An inventor finds that in the oxidation and coloring stage, EDTA with a certain concentration is used, optimization of other parameters is matched, and an aluminum profile which is not prone to fading, resistant to corrosion, even in coloring, free of dark spots and high in glossiness can be accidentally produced.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, and in particular relates to an oxidation electrolytic coloring process for aluminum profiles. Background technique [0002] Aluminum alloy profiles are commonly used as a building material. Before the aluminum alloy profile is used, in order to improve the anti-corrosion performance of the profile and have a certain color decoration effect, the surface of the profile must be treated. Aluminum alloy profile products are divided into electrolytic coloring, spraying organic coating and other products according to the surface treatment method. Electrolytic coloring products are based on the principles of anodic oxidation and electrolytic coloring to form a dense oxide film on the surface of aluminum alloy profiles and electrolytically reduce a certain amount of non-ferrous metal ions in the oxide film to present a certain color. The electrolytic coloring method can improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/14
Inventor 陈国强
Owner ZHEJIANG XINXIANG NEW ENERGY TECH CO LTD
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