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Al-Li composite anode oxide film preparation method

A composite anode, anodizing technology, applied in anodizing, superimposed layer plating, coating, etc., can solve the problems of high price and complicated manufacturing, and achieve high corrosion resistance, high AC impedance value, and cost reduction. Effect

Inactive Publication Date: 2006-12-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Al-Li alloys are complicated to manufacture and expensive

Method used

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  • Al-Li composite anode oxide film preparation method
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  • Al-Li composite anode oxide film preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of Al-Li Composite Anodic Oxidation Film by High Purity Aluminum Al-05

[0022] 1.1 The sample is polished with 300# to 800# water sandpaper in turn, degreased with acetone, degreased with sodium hydroxide alkaline chemical, and lighted with nitric acid solution.

[0023] 1.2 Prepare a saturated lithium sulfate solution and adjust the pH value to 9.

[0024] 1.3 Put the saturated lithium sulfate into the constant temperature oil bath, turn on the switch of the constant temperature oil bath, and set the temperature of the oil bath to the working temperature of 90°C.

[0025] 1.4 When the temperature of the constant-temperature oil bath reaches 90°C, put the sample into a saturated lithium sulfate solution to form a Li-Al double hydroxy metal oxide reaction.

[0026] 1.5 After reacting for 1 hour, turn off the power to take out the sample, wash it with deionized water, and dry it with cold air.

[0027] 1.6 Adjust the temperature of the anodizing s...

Embodiment 2

[0030] Example 2 Preparation of Al-Li composite anodic oxide film on the surface of anti-rust aluminum LF12

[0031] 2.1 The sample is polished with 300# to 800# water sandpaper in turn, degreased with acetone, degreased with sodium hydroxide alkaline chemical, and lighted with nitric acid solution.

[0032] 2.2 Prepare a saturated lithium sulfate solution and adjust the pH value to 11.

[0033] 2.3 Put the saturated lithium sulfate into the constant temperature oil bath, turn on the switch of the constant temperature oil bath, and set the temperature of the oil bath to the working temperature of 95°C.

[0034] 2.4 When the temperature of the constant-temperature oil bath reaches 95°C, put the sample into a saturated lithium sulfate solution to carry out the reaction of forming Li-Al double hydroxyl metal oxide.

[0035] 2.5 After 2 hours of reaction, turn off the power to take out the sample, wash it with deionized water, and dry it with cold air.

[0036] 2.6 Adjust the te...

Embodiment 3

[0039] Example 3 Preparation of Al-Li composite anodized film on the surface of industrial pure aluminum L3

[0040] 3.1 The sample is polished with 300# to 800# water sandpaper in turn, degreased with acetone, degreased with sodium hydroxide alkaline chemical, and illuminated with nitric acid solution.

[0041]3.2 Prepare a saturated lithium sulfate solution and adjust the pH value to 12.

[0042] 3.3 Put the saturated lithium sulfate into the constant temperature oil bath, turn on the switch of the constant temperature oil bath, and set the temperature of the oil bath to the working temperature of 100°C.

[0043] 3.4 When the temperature of the constant-temperature oil bath reaches 100°C, put the sample into a saturated lithium sulfate solution to carry out the reaction of forming Li-Al double hydroxyl metal oxide.

[0044] 3.5 After reacting for 1 hour, turn off the power to take out the sample, wash it with deionized water, and dry it with cold air.

[0045] 3.6 Adjust t...

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Abstract

This invention is related to aluminium or its Al-Li alloy composite anodic oxide films. The existing technology uses Al-Li alloy by anodic oxide method. The production of Al-Li alloy is complex and expensive. This invention put the aluminium or aluminium alloy in Li2SO4 solution in 90-100DEG C, pH 9-12, to generate double hydroxides on its surface. The Al-Li composite anodic oxide films are more unifrom and compact on the basis that didn't change the property of aluminium substrate, and has higher AC impedance value and anticorrasive quality. It can be used in separation membranes, ultramicro network, electroluminescence elements, sensor, catalyst-carrier, heat exchanger. It can be used as ideal protective and decorative film.

Description

technical field [0001] The invention relates to a method for preparing an Al-Li composite anodized film from aluminum and its alloys. Background technique [0002] Aluminum and its alloys are anodized in an acid solution (such as sulfuric acid) to form a porous anodized film with a controllable thickness. The introduction of alloying elements has a great influence on the properties of anodized aluminum films. At present, many researchers use methods such as alloying, sputtering, ion implantation, and sol-gel method to introduce alloying elements such as Ce, Ti, Cr, and Ni to form composite oxide films of aluminum and its alloys. [0003] In the previous preparation of Al-Li composite anodic oxidation film, Al-Li alloy was mainly prepared by anodic oxidation method. Al-Li alloys are complicated to manufacture and expensive. Contents of the invention [0004] The present invention is the method for preparing Al-Li composite anodized film, utilizes aluminum element itself ...

Claims

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Application Information

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IPC IPC(8): C23C28/04C23C22/56C25D11/04
Inventor 左禹叶皓赵旭辉
Owner BEIJING UNIV OF CHEM TECH
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