Anodization method for improving protection performance of aluminum and aluminum alloy

A protective performance and anodizing technology, applied in the field of metal surface treatment, can solve problems such as the inability to meet the safety and long-life use requirements of aluminum and aluminum alloy parts, poor corrosion resistance, and the inability to meet the protective performance of aluminum and aluminum alloy parts.

Inactive Publication Date: 2012-07-25
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although sulfuric acid anodization has good corrosion resistance, it has a great influence on the fatigue performance of the substrate, which cannot meet the safety and long-life requirements of aluminum and aluminum alloy parts; chromic acid anodization has little effect on the fatigue performance of the substrate, but Due to the thin film layer and poor corrosion resistance, it cannot meet the protection performance requirements of aluminum and aluminum alloy parts. At the same time, chromate will also cause great pollution to the environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anodization method for improving protection performance of aluminum and aluminum alloy
  • Anodization method for improving protection performance of aluminum and aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The process of anodizing method is as follows:

[0018] 1. The test material is 2024 bare aluminum plate, the heat treatment system is T3, and the size is 75mm×150mm×2mm;

[0019] 2. Immerse aluminum and aluminum alloy samples in acetone, ultrasonically degrease for 8 minutes, take them out and dry them with hot air at 50°C;

[0020] 3. Hang the aluminum and aluminum alloy samples on the aluminum alloy hanger;

[0021] 4. Put the aluminum and aluminum alloy samples in a 50g / L cleaning agent solution to degrease the surface of the sample, degreasing in the cleaning agent at 60°C for no less than 10 minutes; wash the sample with running water after degreasing;

[0022] 5. Deoxidize the aluminum and aluminum alloy samples at 25°C. The deoxidation time is 3 minutes. After taking it out, clean the surface of the sample with deionized water; the chromic anhydride (CrO 3 ) concentration is 45g / L, nitric acid (HNO 3 , ρ=1.42g / mL) concentration is 100g / L, and hydrofluoric aci...

Embodiment 2

[0027] The process of anodizing method is as follows:

[0028] 1. The test material is 7075 bare aluminum plate, the heat treatment system is T6, and the size is 75mm×150mm×2mm;

[0029] 2. Immerse aluminum and aluminum alloy samples in acetone, ultrasonically degrease for 8 minutes, take them out and dry them with hot air at 50°C;

[0030] 3. Hang the aluminum and aluminum alloy samples on the aluminum alloy hanger;

[0031] 4. Put the aluminum and aluminum alloy samples in a 50g / L cleaning agent solution to degrease the surface of the sample, degreasing in the cleaning agent at 60°C for no less than 10 minutes; wash the sample with running water after degreasing;

[0032] 5. Deoxidize the aluminum and aluminum alloy samples at 25°C. The deoxidation time is 3 minutes. After taking it out, clean the surface of the sample with deionized water; the deoxidation solution is chromic anhydride (CrO 3 ) concentration is 45g / L, nitric acid (HNO 3 , ρ=1.42g / mL) concentration is 100g...

Embodiment 3

[0037] The process of anodizing method is as follows:

[0038] 1. The test material is 2024 aluminum plate, the heat treatment system is T3, and the size is 75mm×150mm×1.5mm;

[0039] 2. Immerse aluminum and aluminum alloy samples in acetone, ultrasonically degrease for 8 minutes, take them out and dry them with hot air at 50°C;

[0040] 3. Hang the aluminum and aluminum alloy samples on the aluminum alloy hanger;

[0041] 4. Put the aluminum and aluminum alloy samples in a 50g / L cleaning agent solution to degrease the surface of the sample, degreasing in the cleaning agent at 60°C for no less than 10 minutes; wash the sample with running water after degreasing;

[0042] 5. Deoxidize the aluminum and aluminum alloy samples at 25°C. The deoxidation time is 3 minutes. After taking it out, clean the surface of the sample with deionized water; the deoxidation solution is chromic anhydride (CrO 3 ) concentration is 45g / L, nitric acid (HNO 3 , ρ=1.42g / mL) concentration is 100g / L,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an anodization method for improving the protection performance of aluminum and aluminum alloy. Adopted anodization solution is prepared through proportionally mixing water and at least one kind of inorganic salt of sulfuric acid, sodium borate, malic acid and cerium, a voltage control mode is adopted for the anodization, and the aluminum or the aluminum alloy materials are subjected to anodization treatment. Anodization film layers prepared by adopting the method provided by the invention have the advantages that the corrosion resistance is good, the combination performance with organic paint films is excellent, and the influence on the substrate fatigue performance is low. The anodization method has the characteristics that the process is simple, the performance is stable, the film forming efficiency is high, and the environment pollution is low. The anodization method can be used for replacing the traditional chromic acid anodization and sulfuric acid anodization technology and can be applied to the surface protection of aluminum and aluminum alloy materials in all industries such as aviation and the like.

Description

technical field [0001] The invention relates to an anodizing method for improving the protection performance of aluminum and aluminum alloy, and belongs to the technical field of metal surface treatment. Background technique [0002] Aluminum and aluminum alloys are currently one of the most widely used metal structural materials. Selecting the appropriate aluminum and aluminum alloy surface treatment process plays an important role in improving the corrosion resistance of aluminum and aluminum alloy, enhancing its bonding force with the organic coating, and ensuring the fatigue performance of the base material. The traditional aluminum and aluminum alloy surface protection process usually adopts sulfuric acid anodization or chromic acid anodization process. Although sulfuric acid anodization has good corrosion resistance, it has a great influence on the fatigue performance of the substrate, which cannot meet the safety and long-life requirements of aluminum and aluminum al...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/10
Inventor 宇波汤智慧吴松林陈洁陆峰彭超朱瑞鑫张晓云丁建岗易俊兰刘明辉宋袁曾
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap