Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of normal temperature sealing treatment method of al-cu-li alloy anodized film

An al-cu-li, room temperature sealing technology, applied in anodic oxidation, coating, surface reaction electrolytic coating, etc., can solve the problems of poor sealing effect of boiling water, complicated sealing formula, long preparation time, etc., and meet the preparation conditions Easy to meet, improve anti-corrosion ability, low price effect

Active Publication Date: 2021-07-23
CHONGQING UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the sealing effect of boiling water is not good and the energy consumption is high (generally at 100°C for 30 minutes); the sealing of dichromate shows excellent corrosion resistance due to the corrosion inhibition effect of Cr(VI), but due to the effect of Cr(VI) on There are serious hazards to the environment and the human body, and related surface treatment technologies have been gradually banned from use
In recent years, there have been research reports on the development of green sealing treatments, such as rare earth salts, organic matter, sol-gel and other sealing treatments, but they all have the disadvantages of long preparation time or complicated sealing formulas, making it difficult to popularize in actual production
At present, there is still a lack of an effective method that can quickly seal the micropores of anodized film and significantly improve its corrosion resistance under normal temperature conditions (25~30°C).

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
  • A kind of normal temperature sealing treatment method of al-cu-li alloy anodized film
  • A kind of normal temperature sealing treatment method of al-cu-li alloy anodized film
  • A kind of normal temperature sealing treatment method of al-cu-li alloy anodized film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one, a kind of normal temperature sealing treatment method of Al-Cu-Li alloy anodized film, it comprises the following steps:

[0026] a. Pretreatment, take the polished AA2099 aluminum-lithium alloy sample for alkali etching process, put the polished side up into a 10wt.% NaOH aqueous solution, keep it at a constant temperature for 300s at a temperature of 60°C, take it out and use it Rinse with ionized water. Immediately after the pickling process, the polished side of the AA2099 Al-Li alloy sample was put into 30 vol.% HNO horizontally. 3 Chemical deashing was carried out in the aqueous solution for 30 s, then taken out and rinsed with deionized water, and finally dried with cold air to obtain the pretreated AA2099 Al-Li alloy.

[0027] b, anodic oxidation surface treatment, with the pretreated AA2099 aluminum-lithium alloy obtained in step a as the anode, and the ring-shaped high-purity aluminum sheet as the cathode, the anode is carried out in a mixed s...

Embodiment 2

[0031] Embodiment two, a kind of normal temperature sealing treatment method of Al-Cu-Li alloy anodized film, it comprises the following steps:

[0032] a. Pretreatment, take the polished AA2099 aluminum-lithium alloy sample for alkali etching process, put the polished side up into a 10wt.% NaOH aqueous solution, keep it at a constant temperature for 300s at a temperature of 60°C, take it out and use it Rinse with ion water, then carry out pickling process immediately, put the polished side of AA2099 aluminum-lithium alloy sample into 30 vol.% HNO horizontally 3 Chemical deashing was carried out in the aqueous solution for 30 s, then taken out and rinsed with deionized water, and finally dried with cold air to obtain the pretreated AA2099 Al-Li alloy.

[0033] b, anodic oxidation surface treatment, with the pretreated AA2099 aluminum-lithium alloy obtained in step a as the anode, and the ring-shaped high-purity aluminum sheet as the cathode, the anode is carried out in a mixed...

Embodiment 3

[0036] Embodiment three, a kind of room temperature sealing treatment method of Al-Cu-Li alloy anodized film, it comprises the following steps:

[0037] a. Pretreatment, take the polished AA2099 aluminum-lithium alloy sample for alkali etching process, put the polished side up into a 10wt.% NaOH aqueous solution, keep it at a constant temperature for 300s at a temperature of 60°C, take it out and use it Rinse with ion water, then carry out pickling process immediately, put the polished side of AA2099 aluminum-lithium alloy sample into 30 vol.% HNO horizontally 3 Chemical deashing was carried out in the aqueous solution for 30 s, then taken out and rinsed with deionized water, and finally dried with cold air to obtain the pretreated AA2099 Al-Li alloy.

[0038] b, anodic oxidation surface treatment, with the pretreated AA2099 aluminum-lithium alloy obtained in step a as the anode, and the ring-shaped high-purity aluminum sheet as the cathode, the anode is carried out in a mixed...

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 discloses a normal temperature sealing treatment method for an Al-Cu-Li alloy anodic oxidation film, belongs to the field of surface science and technology, and is a method for sealing treatment by using layered double hydroxyl metal oxides, which includes the following steps: a. Treatment, Al Cu Li alloy surface is obtained pretreatment Al Cu Li alloy through grinding, alkali etching, pickling process; B, anodic oxidation surface treatment, the pretreatment Al Cu Li alloy obtained in step a Put into an acidic solution for anodic oxidation, obtain a porous anodized film on the surface of the Al-Cu-Li alloy; c, seal at room temperature, put the Al-Cu-Li alloy obtained in step b into the lithium carbonate aqueous solution of 0.05 ~ 0.1M In the air environment, the temperature is kept at a constant temperature of 25-30°C for 30-180min, and then the treated Al-Cu-Li alloy is taken out, rinsed with deionized water, and dried to realize the Al-Cu-Li alloy anodic oxidation film Closed at room temperature. It can significantly improve the corrosion resistance of the anodized aluminum-lithium alloy, has low reaction temperature and short time, and the production process is environmentally friendly and suitable for industrial production.

Description

technical field [0001] The invention belongs to metal surface protection treatment technology, in particular to a normal temperature sealing treatment method for Al-Cu-Li alloy anodic oxidation film. Background technique [0002] In order to save energy and reduce carbon emissions in the aviation field, a large number of lightweight materials are used to replace traditional aluminum alloys. Among them, the third-generation new aluminum-lithium alloy has the advantages of high specific strength, specific stiffness and good fatigue resistance, and has been successfully applied in the aviation field. At present, new aluminum-lithium alloys such as 2099, 2198, and 2196 are used on large passenger aircraft such as Airbus A380 and domestic C919 as parts such as fuselage skins and seat rails. [0003] In order to meet the requirements of mechanical properties, a large number of alloying elements must be added to aerospace aluminum alloys, and these alloying elements often reduce t...

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 Patents(China)
IPC IPC(8): C25D11/24C25D11/08C25D11/10
CPCC25D11/08C25D11/10C25D11/246
Inventor 麻彦龙朱彭舟杨炳元刘磊谭力文柴林江郭非王忠维
Owner CHONGQING UNIV OF TECH