Nickel-free hole sealing agent for aluminum alloy and hole sealing treatment process of agent
A treatment process and aluminum alloy technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve problems such as nickel pollution, achieve energy saving, eliminate pollution, and reduce the amount of dissolved aluminum.
Active Publication Date: 2014-02-19
FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem of severe nickel pollution in the existing aluminum alloy sealing process, provide a nickel-free aluminum alloy sealing agent and its sealing process, and promote the aluminum alloy surface treatment technology to be environmentally friendly and efficient , Energy-saving direction development
Method used
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Embodiment 1
[0068] Fluotitanic acid (50wt.%) 7.5g / L was selected as the sealing component; ethylene glycol 2.0g / L was used as the corrosion inhibitor, sodium tripolyphosphate 2.0g / L was used as the chelating component, and the working temperature was 25°C. The pH value is 3.5, and the sealing speed is 1 μm / min.
Embodiment 2
[0070] Fluotitanic acid (50wt.%) 7.5g / L was selected as the sealing component; glycerol 2.0g / L was used as the corrosion inhibitor, sodium tripolyphosphate 2.0g / L was used as the chelating component, the working temperature was 25°C, pH The value is 3.5, and the sealing speed is 1 μm / min.
Embodiment 3
[0072] Fluotitanic acid (50wt.%) 7.5g / L was selected as the sealing component; sorbitol 2.0g / L was used as the corrosion inhibitor, sodium tripolyphosphate 2.0g / L was used as the chelating component, the working temperature was 25°C, and the pH value 3.5, sealing speed 1μm / min;
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Abstract
The invention discloses a nickel-free hole sealing agent for an aluminum alloy. The nickel-free hole sealing agent comprises water solutions of fluorotitanic acid, a corrosion inhibitor and a chelating agent, wherein on the basis of the volume of the hole sealing agent, the concentration of the fluorotitanic acid is 6.0-9.0 g / L, the concentration of the corrosion inhibitor is 1.0-3.0 g / L and the concentration of the chelating agent is 1.0-3.0 g / L. The hole sealing agent takes the fluorotitanic acid as the main ingredient, and pollution of nickel salt to the aluminum alloy and the water quality is eliminated from the source. The invention further provides a hole sealing treatment process using the nickel-free hole sealing agent for the aluminum alloy. The operation is simple, energy conservation and environment protection are realized, waste water is easy to treat, the hole sealing agent is suitable for large-scale production, nickel pollution in the building aluminum alloy finished surface treatment process, the aluminum alloy using process and the waste treatment process is completely ended, and the bottleneck problem about restricting the industry development over the years is solved.
Description
technical field [0001] The invention belongs to the technical field of chemical surface treatment of metal materials, and in particular relates to a nickel-free sealing agent for sealing holes on an aluminum alloy oxide film layer and a sealing process thereof. Background technique [0002] At present, the anodic oxidation sealing of architectural aluminum alloys in my country mainly adopts the cold sealing process and the medium temperature sealing process, and nickel salt is the main component of the sealing agent. [0003] like figure 1 In the aluminum alloy sealing process shown in the prior art, the aluminum alloy is firstly pretreated, then anodized and electrolytically colored, and then sealed. After sealing, it needs to go through more than two washing tanks of washing 1 and washing 2 for water washing treatment to clean the nickel-containing sealing liquid remaining on the surface of the aluminum alloy during the anodic oxidation sealing process before it can be pa...
Claims
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IPC IPC(8): C25D11/18
Inventor 熊晨凯熊映明
Owner FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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