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Aluminum alloy corrosion-resistant surface treatment method

A surface treatment, anti-corrosion technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problems of poor interface adhesion, poor corrosion resistance, easy delamination, etc., to achieve good interface adhesion, interface The effect of the bonding force is not easy to delaminate

Active Publication Date: 2017-08-18
浙江春旭铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the anti-corrosion surface treatment methods for aluminum alloys in the prior art have the problems of poor corrosion resistance, poor interface bonding force and easy delamination

Method used

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  • Aluminum alloy corrosion-resistant surface treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for treating an anti-corrosion surface of an aluminum alloy, comprising the following steps:

[0014] 1) Degreasing and alkali etching treatment, the specific steps are: A. Take the concentrated sodium hydroxide solution and hot water at a temperature of 40°C in a ratio of 1:5 and add them to the blender for mixing, and pass through the blender at a rate of 35r / pm Stir at a rotating speed evenly to prepare a hot alkaline solution with a concentration of 18% for later use; B. Pour the hot alkaline solution prepared in the specific step A into the cleaning tank, then put the aluminum alloy plate into the cleaning tank, and use a brush to clean the aluminum alloy. The surface of the alloy plate is scrubbed and degreased, the grease on the surface of the aluminum alloy plate is cleaned, and it is set aside; D. Take ionized water to carry out alkaline cleaning of the residual alkaline solution on the surface of the aluminum alloy plate, and then use the ionized water...

Embodiment 2

[0021] A method for treating an anti-corrosion surface of an aluminum alloy, comprising the following steps:

[0022] 1) Degreasing and alkali etching treatment, the specific steps are: A. Take the concentrated sodium hydroxide solution and hot water at a temperature of 60°C in a ratio of 1:5 and add them to the mixer for mixing, and pass them through the mixer at a rate of 35r / pm Stir at a rotating speed evenly to prepare a hot alkaline solution with a concentration of 20% for later use; B. Pour the hot alkaline solution prepared in the specific step A into the cleaning tank, then put the aluminum alloy plate into the cleaning tank, and use a brush to clean the aluminum The surface of the alloy plate is scrubbed and degreased, the grease on the surface of the aluminum alloy plate is cleaned, and it is set aside; D. Take ionized water to carry out alkaline cleaning of the residual alkaline solution on the surface of the aluminum alloy plate, and then use the ionized water to al...

Embodiment 3

[0029] A method for treating an anti-corrosion surface of an aluminum alloy, comprising the following steps:

[0030] 1) Degreasing and alkali etching treatment, the specific steps are: A. Take the concentrated sodium hydroxide solution and hot water at a temperature of 50°C in a ratio of 1:5 and add them to the blender for mixing, and pass through the blender at a rate of 35r / pm Stir at a rotating speed evenly to prepare a hot alkaline solution with a concentration of 19% for subsequent use; B. Pour the hot alkaline solution prepared in the specific step A into the cleaning tank, then put the aluminum alloy plate into the cleaning tank, and use a brush to clean the aluminum alloy. The surface of the alloy plate is scrubbed and degreased, the grease on the surface of the aluminum alloy plate is cleaned, and it is set aside; D. Take ionized water to carry out alkaline cleaning of the residual alkaline solution on the surface of the aluminum alloy plate, and obtain Clean aluminu...

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Abstract

The invention discloses an aluminum alloy corrosion-resistant surface treatment method. An aluminum alloy plate is firstly placed into a sodium hydroxide solution to be subject to soaking and scrubbing ungreasing treatment; secondly, the remnant solution on the aluminum alloy plate is washed with ionized water, and the aluminum alloy plate is subject to alkali corrosion treatment; thirdly, an electrolyte is used for conducting anodic oxidation treatment on the aluminum alloy plate, and therefore an oxydic hard film is generated on the surface of the aluminum alloy plate; fourthly, nickel chloride acid liquor is adopted for conducting activating treatment on the hard film on the surface of the aluminum alloy plate, and the deionized water is adopted for washing the remnant solution; and finally, the aluminum alloy plate is subject to electrolytic coloring and hole sealing treatment. The aluminum alloy plate prepared through the method has the beneficial effects of being resistant to corrosion, good in interface bonding force and not prone to delaminating.

Description

technical field [0001] The invention relates to an aluminum alloy anti-corrosion surface treatment method. Background technique [0002] Aluminum alloy is known as the green metal structural material in the 21st century for its light weight, high specific strength, good processing performance and excellent electromagnetic shielding properties; aluminum alloy has small specific gravity, high specific strength, excellent thermal conductivity and Excellent castability, widely used in aerospace, electronics and transportation vehicles and other fields. However, aluminum alloys suffer severe corrosion in humid air or marine atmospheres. Therefore, it is an important problem to be solved for aluminum alloy and aluminum alloy application to carry out anti-corrosion treatment on its surface and improve its corrosion resistance. [0003] At present, the surface protection treatment methods of aluminum alloy mainly include chemical conversion treatment, organic coating treatment, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/14C25D11/24C23G1/22C23F1/36
CPCC23F1/36C23G1/22C25D11/14C25D11/16C25D11/246
Inventor 潘永平叶鑫慧翁胜荣刘文涛叶正朋林建英简姣
Owner 浙江春旭铝业有限公司
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