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A kind of beryllium material electrochemical insulation anodic oxidation treatment method

A technology of anodization and treatment method, applied in anodization and other directions, can solve the problems of metal beryllium dissolution corrosion, lack of anti-corrosion performance, electrochemical corrosion, etc., and achieve good insulation performance and corrosion resistance Avoid the effect of coating peeling

Active Publication Date: 2016-03-02
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because its oxide film is relatively thin, beryllium is easily corroded in a humid atmosphere, so it does not have anti-corrosion performance in a humid environment. At this time, corrosion is considered to be an extension of water corrosion. Moisture or condensed water vapor in the atmosphere provides electrolyte , causing the beryllium with local defects in the oxide film and other impurities to form a miniature primary battery, and electrochemical corrosion occurs, resulting in the dissolution and corrosion of metal beryllium

Method used

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  • A kind of beryllium material electrochemical insulation anodic oxidation treatment method
  • A kind of beryllium material electrochemical insulation anodic oxidation treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Wipe the beryllium parts with acetone, then dry the surface with a hair dryer at a temperature of 45°C, and then immerse the beryllium parts in an alcohol solution with a temperature of 40°C and a concentration of 40% for ultrasonic cleaning for 15 minutes. The working power of the ultrasonic cleaning machine is 25KHz . Rinse the beryllium parts after ultrasonic cleaning with deionized water, and then carry out chemical degreasing. The degreasing solution is prepared by dissolving 15g sodium carbonate, 10g sodium pyrophosphate and 20g sodium silicate in 1000mL deionized water. The chemical degreasing process Keep the temperature of the solution between 30 and 40°C;

[0023] Rinse the beryllium parts after chemical degreasing with deionized water again, and then immerse the beryllium parts in a weak etching solution for weak etching treatment. The weak etching solution is a mixture prepared by dissolving 450mL concentrated sulfuric acid in 500mL deionized water. solutio...

Embodiment 2

[0036] Change the volume of the concentrated sulfuric acid in embodiment 1, the etching solution that 450mL concentrated sulfuric acid is dissolved in the preparation of 600mL deionized water, all the other conditions are the same as embodiment 1;

[0037] The obtained anodic oxidation film of the beryllium material electrochemical part is gray black, the film layer is uniform and dense, and the bonding force is good.

Embodiment 3

[0039] Change the quality 140g of sodium hydroxide in embodiment 1, all the other conditions are with implementing 1

[0040] The obtained anodic oxidation film of the beryllium material electrochemical part is gray black, the film layer is uniform and dense, and the bonding force is good.

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Abstract

The invention relates to a beryllium material electrochemical insulating anodic oxidation treatment method, and belongs to the technical field of beryllium material surface treatment. The method comprises the following steps: 1) wiping a machined beryllium material surface by using a solvent; 2) blow-drying an organic solvent on the surface of the wiped beryllium material wiped by using the organic solvent by virtue of a blower; 3) performing ultrasonic cleaning on the obtained beryllium material by using an alcohol solution; 4) soaking the ultrasonically cleaned beryllium material parts in a chemical degreasing solution; 5) soaking the degreased beryllium material parts in a weak etching solution to perform the weak etching treatment; 6) soaking the weakly etched beryllium parts in an electrochemical insulation anodic oxidation treatment solution to perform the electrochemical insulation anodic oxidation treatment for 10-20 minutes, wherein the current density is 5-8A / dm<2>. The method provided by the invention is simple in process combination and strong in operability and can be used for industrial production.

Description

technical field [0001] The invention relates to a beryllium material electrochemical insulation anodic oxidation treatment method, which belongs to the technical field of beryllium material surface treatment. Background technique [0002] Beryllium is a thermodynamically unstable metal, and an oxide film with a thickness of about 10nm can be formed when exposed to room temperature. The beryllium oxide film consists of two layers, the inner oxide film is an amorphous compact non-porous layer (also known as barrier layer) near the metal surface, and the loose outer layer is slightly thicker than the inner layer. The inner oxide film is compressed on the surface of the beryllium material, which can form a dense protective film and inhibit slight corrosion. Therefore, the beryllium material has good corrosion resistance in a dry atmosphere at room temperature. Because its oxide film is relatively thin, beryllium is easily corroded in a humid atmosphere, so it does not have anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34
Inventor 朱志刚崔砚薛凤举王长峰王长青张锐班建钢钟声柳文涛邓忠武
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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