A kind of electrolytic oxidation solution used for aluminum alloy oxidation film formation and aluminum alloy oxidation film formation method
A technology of electrolytic oxidation and film forming method, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., to achieve the effect of reducing emissions, reducing oxygen consumption of wastewater, and easy control
Active Publication Date: 2021-04-09
WEIFANG GUOYI ALUMINUM +2
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- Abstract
- Description
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Problems solved by technology
[0018] The second technical problem to be solved by the present invention is: aiming at the deficiencies in the prior art, a method for forming an aluminum alloy film by oxidation is provided, the process method is simple, and the electrolytic waste liquid does not need to be replaced, which solves the environmental protection problem
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Embodiment 1
[0053] An electrolytic oxidation solution used for aluminum alloy oxidation film formation, the electrolytic oxidation solution contains the following components: ammonia hydrogen fluoride 0.2g / L, oxalic acid 10g / L; Al in the oxidation solution 3+ The equilibrium solubility is 0.1g / L.
Embodiment 2
[0055] An electrolytic oxidation solution used for aluminum alloy oxidation film formation, the electrolytic oxidation solution contains the following components: ammonia hydrogen fluoride 0.4g / L, oxalic acid 20g / L; Al in the oxidation solution 3+ The equilibrium solubility is 0.2g / L.
Embodiment 3
[0057] An electrolytic oxidation solution used for aluminum alloy oxidation film formation, the electrolytic oxidation solution contains the following components: ammonia hydrogen fluoride 0.6g / L, oxalic acid 30g / L; Al in the oxidation solution 3+ The equilibrium solubility is 0.22g / L.
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Abstract
The invention discloses an electrolytic oxidation solution used for oxidation and film formation of aluminum alloys and a method for oxidation and film formation of aluminum alloys. The electrolytic oxidation solution contains the following components: 0.1-1 g / L of ammonia hydrogen fluoride, and 5-60 g / L of oxalic acid; Al in the oxidizing solution 3+ The equilibrium solubility is 0.01-1g / L. An aluminum alloy oxidation film formation method, using the above-mentioned electrolytic oxidation solution, adopts an electrolysis method to form a layer of organic and inorganic fluorine-containing oxide film on the surface of aluminum alloy through the joint action of chemical film formation and electrochemical film formation. Using the electrolytic oxidation solution of the present invention to form an electrolytic oxidation film, chemical film formation and electrochemical film formation work together, and the film formation process is fast; the aluminum ion concentration in the oxidation solution is generally around 0.1g / L to produce ionization balance, and the aluminum ion concentration is no longer increase, so the oxidizing solution does not need to be replaced and can be recycled, so compared with the prior art, the solid waste is reduced.
Description
technical field [0001] The invention relates to the technical field of surface treatment of aluminum alloy profiles, in particular to a film-forming treatment technology using electrochemical oxidation. Background technique [0002] The surface oxidation treatment of aluminum alloy is mainly to form a protective film on the surface of aluminum profile. This layer of film has protective, decorative and some other functional characteristics to meet the needs of aluminum anodizing for construction, anodizing aluminum for decoration, anodizing aluminum for corrosion protection, and anodizing aluminum for engineering. According to different usage purposes and different performance requirements, make full use of the characteristics of the membrane to meet different uses. [0003] According to the different electrolytes in the prior art, it can be roughly divided into barrier type anodized film electrolytes: boric acid, neutral borate, neutral phosphate, neutral tartrate, neutral ...
Claims
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IPC IPC(8): C25D11/10
CPCC25D11/10
Inventor 西华昆马康慷张祥华庄乾浩毕小雪杨维玉高瑞安
Owner WEIFANG GUOYI ALUMINUM
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