Electrochemical conductive oxidizing technology method of aluminum and aluminum alloy

A technology of conductive oxidation and process method, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of high cost of chromium-free conversion treatment technology, high solution stability, difficult on-line detection, etc.

Pending Publication Date: 2021-04-23
云南昆船机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, provide an electrochemical conductive oxidation process for aluminum and aluminum alloys, solve the damage to the environment and human body caused by the traditional chromate passivation method, and provide a chromium-free conversion treatment technology Disadvantages of high cost and difficulty in online detection. The sewage produced by this method will not affect the environment, and it can be discharged after acid-base neutralization. It is an environmentally friendly process, and it is easy to operate and control, with high solution stability and low cost.

Method used

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  • Electrochemical conductive oxidizing technology method of aluminum and aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Aluminum and aluminum alloy electrochemical conductive oxidation process, including the following steps:

[0042]Step 1: Organic solvent removal treatment: EtOAc EtOAc EtOAc EtOAc EtOAc.

[0043]Step 2: Chemical removal treatment: Work members after steps are placed in an aluminum substrate deinterlet-free, and then rinse the surface skim of the surface of 40 ° C, then rinse with flow tap water;

[0044]Step 3: Alkali EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc Solidizing Sodium oxide and sodium carbonate, sodium hydroxide content are 40 g / L, sodium carbonate is 5g / L

[0045]Step 4: Outlet Treatment: The workpiece treated step three is placed at room temperature for 2 min; then flush with flow tap water, then rinse with flow deionized water; the light-liquid solution contains nitric acid, the nitric acid content is 400g / L;

[0046]Step 5: Electrolysis processing: The workpiece processed by step four is placed in the electrolytic tank, the t...

Embodiment 2

[0059]Aluminum and aluminum alloy electrochemical conductive oxidation process, including the following steps:

[0060]Step 1: Organic solvent removal treatment: EtOAc EtOAc EtOAc EtOAc EtOAc.

[0061]Step 2: Chemical removal treatment: Work members after steps are placed in an aluminum substrate deinterlet-free, and then rinse the surface skim of the surface of 40 ° C, then rinse with flow tap water;

[0062]Step 3: Alkali EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc Solidizing Sodium oxide and sodium carbonate, sodium hydroxide content are 40 g / L, sodium carbonate is 5g / L

[0063]Step 4: Outlet Treatment: The workpiece treated step-processed workpiece is placed at room temperature for 1min; then rinse with flow tap water, then rinse with flow deionized water; the lighting solution contains nitric acid, nitric acid content of 400g / L;

[0064]Step 5: Electrolysis processing: The workpiece processed by step four is placed in the electrolytic tank, the ta...

Embodiment 3

[0077]Aluminum and aluminum alloy electrochemical conductive oxidation process, including the following steps:

[0078]Step 1: Organic solvent removal treatment: EtOAc EtOAc EtOAc EtOAc EtOAc.

[0079]Step 2: Chemical removal treatment: Working members after steps are placed in an aluminum substrate deinterlete, and then rinse the surface degreaser with a hot water of 80 ° C after absorbing, and then rinsed with flowing tap water;

[0080]Step 3: Alkali EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc Solidizing Sodium oxide and sodium carbonate, sodium hydroxide content of 60 g / L, sodium carbonate is 10 g / L;

[0081]Step 4: Outlet Treatment: The workpiece processed by step three is placed at room temperature for 3 min; then flush with flow tap water, then rinse with flow deionized water; the light-suction solution contains nitric acid, the nitric acid content is 600g / L;

[0082]Step 5: Electrolysis processing: The workpiece processed by step four is ...

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Abstract

The invention relates to an electrochemical conductive oxidizing technology method of aluminum and aluminum alloy, and belongs to the technical field of nonferrous metal material surface electrochemistry. The method comprises the steps of organic solvent degreasing treatment, chemical degreasing treatment, alkaline etching treatment, glaring treatment, electrolysis treatment, neutralizing treatment, dyeing treatment and sealing treatment. Through the method, a layer of conductive oxidizing film which can be in diversified colors is formed on the surface of an aluminum alloy workpiece, and has good corrosion resistance, electrical conductivity, color consistency and paint film adhesion; by means of the oxidizing film, the requirements of 15 cycles of a damp heat test can be met; the contact resistance of any positions of the film is smaller than 0.9 omega; and the conductive converting film (conductive oxidizing film) does not fall off after being stuck to paper self-adhesive tape 100 times, and the conductive converting film (conductive oxidizing film) does not fall off after being erased by a sand-free eraser manually at common pressure 50 times so that the aluminum and aluminum alloy can be applied to a wide variety of fields of aerospace, ships, architecture, electrical engineering, chemistry, transportation, automobiles and the like.

Description

Technical field[0001]The present invention belongs to the field of surface electrochemical treatment of a colored metal material, and more particularly to aluminum and aluminum alloy electrochemical conductive oxidation process methods.Background technique[0002]Aluminum and aluminum coordinate metal, which has a series of advantages such as small density, strong conductive thermal conductivity, excellent mechanical properties and good processability, and widely used in aerospace, ships, buildings, electrical, chemical, transportation, automobiles and other fields. . Different degrees of corrosion occurs in the acid-base environment in a particular concentration range, and it is easy to generate a layer of corrosion resistance in the surface of the aluminum alloy, especially in a moisture environment, and therefore, in the use of aluminum alloy The product must be chemically oxidized or electrochemically oxidative to ensure the normal use performance of the product.[0003]The chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/10C25D11/16C25D11/24C23F1/36
CPCC25D11/08C25D11/10C25D11/16C25D11/24C25D11/243C25D11/246C23F1/36
Inventor 李春雷董国伟李强崔李苹张海峰齐宇春
Owner 云南昆船机械制造有限公司
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