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Aluminum and aluminum alloy anodic oxidation nickel removing and hole sealing process

An anodic oxidation and aluminum alloy technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of easy fading, poisonous to the human body and the environment, high energy consumption, etc., and achieve the effect of not easy to fade and reduce damage

Active Publication Date: 2017-05-24
东莞市至德精密部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The boiling water sealing method consumes a lot of energy and cannot meet the requirements for higher corrosion resistance; commonly used nickel salt sealing agents containing nickel are toxic to the human body and the environment; There is an urgent need to develop new technologies for aluminum anodic oxidation sealing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Aluminum and aluminum alloy anodic oxidation nickel removal sealing process, including the following steps:

[0022] Step 1, carrying out pretreatment to aluminum and aluminum alloy;

[0023] Step 2, after the pre-treatment is completed, the aluminum and aluminum alloys are anodized for the first time;

[0024] Step 3, washing and dyeing the aluminum and aluminum alloy after primary anodization;

[0025] Step 4, nickel sealing the dyed aluminum and aluminum alloy;

[0026] Step 5, carry out post-treatment of nickel sealing to the aluminum and aluminum alloy after nickel sealing;

[0027] Step 6, performing a second anodic oxidation on the aluminum and aluminum alloy after nickel sealing to remove nickel;

[0028] Step seven, post-processing the aluminum and aluminum alloy after the second anodic oxidation to obtain the required product.

[0029] Among them, the nickel-sealing agent is nickel acetate-based sealing treatment agent produced by OKUNO, Japan, and the nic...

Embodiment 2

[0039] Aluminum and aluminum alloy anodic oxidation nickel removal sealing process, including the following steps:

[0040] Step 1, carrying out pretreatment to aluminum and aluminum alloy;

[0041] Step 2, after the pre-treatment is completed, the aluminum and aluminum alloys are anodized for the first time;

[0042] Step 3, washing and dyeing the aluminum and aluminum alloy after primary anodization;

[0043] Step 4, nickel sealing the dyed aluminum and aluminum alloy;

[0044] Step 5, carry out post-treatment of nickel sealing to the aluminum and aluminum alloy after nickel sealing;

[0045] Step 6, performing a second anodic oxidation on the aluminum and aluminum alloy after nickel sealing to remove nickel;

[0046] Step seven, post-processing the aluminum and aluminum alloy after the second anodic oxidation to obtain the required product.

[0047] Among them, the nickel-sealing agent is nickel acetate-based sealing treatment agent produced by OKUNO, Japan, and the nic...

Embodiment 3

[0051] Aluminum and aluminum alloy anodic oxidation nickel removal sealing process, including the following steps:

[0052] Step 1, carrying out pretreatment to aluminum and aluminum alloy;

[0053] Step 2, after the pre-treatment is completed, the aluminum and aluminum alloys are anodized for the first time;

[0054] Step 3, washing and dyeing the aluminum and aluminum alloy after primary anodization;

[0055] Step 4, nickel sealing the dyed aluminum and aluminum alloy;

[0056] Step 5, carry out post-treatment of nickel sealing to the aluminum and aluminum alloy after nickel sealing;

[0057] Step 6, performing a second anodic oxidation on the aluminum and aluminum alloy after nickel sealing to remove nickel;

[0058] Step seven, post-processing the aluminum and aluminum alloy after the second anodic oxidation to obtain the required product.

[0059] Among them, the nickel-sealing agent is nickel acetate-based sealing treatment agent produced by OKUNO, Japan, and the nic...

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PUM

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Abstract

The invention relates to the technical field of metal surface treatment processes, in particular to an aluminum and aluminum alloy anodic oxidation nickel removing and hole sealing process. The process comprises the following steps: (1) aluminum and an aluminum alloy are pretreated; (2) after the pretreatment is finished, the primary anodic oxidation is performed for the aluminum and the aluminum alloy; (3) the water washing and the dyeing are performed for the aluminum and the aluminum alloy after primary anodic oxidation; (4) the nickel hole sealing is performed for the dyed aluminum and aluminum alloy; (5) the nickel hole sealing aftertreatment is performed for the aluminum and the aluminum alloy after nickel hole sealing; (6) the secondary anodic oxidation nickel removal is performed for the aluminum and the aluminum alloy after nickel hole sealing aftertreatment; and (7) the aftertreatment is performed for the aluminum and the aluminum alloy after secondary anodic oxidation to obtain a needed product. The process uses the primary anodic oxidation for forming an oxide film on the surface of the aluminum or the aluminum alloy and forming a microhole on the surface of the oxide film; and an outer layer oxide film formed by secondary anodic oxidation wraps nickel, so that nickel cannot be released from the microhole, and the damage of nickel is reduced.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment technology, in particular to aluminum and aluminum anodic oxidation nickel removal and sealing technology. Background technique [0002] At present, aluminum and its alloys generally use anodic oxidation surface protection technology to form a certain thickness of oxide film on the surface of aluminum and its alloys. Since there are a large number of micropores on the surface of the oxide film, appropriate sealing treatment must be carried out. The common sealing method There are mainly boiling water sealing, nickel salt sealing, and nickel-free potion sealing. The boiling water sealing method consumes a lot of energy and cannot meet the requirements for higher corrosion resistance; commonly used nickel salt sealing agents containing nickel are toxic to the human body and the environment; There is an urgent need to develop new technologies for aluminum anodic oxidation sealing. ...

Claims

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Application Information

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IPC IPC(8): C25D11/12C25D11/18
CPCC25D11/12C25D11/18
Inventor 阮家良
Owner 东莞市至德精密部件有限公司