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Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface

A technology of micro-arc oxidation on the surface of aluminum alloy, applied in the direction of anodic oxidation, etc., can solve the problems of single color, unenvironmental protection of vanadate electrolyte, and not widely used, and achieve uniform color, wide range of process application, and avoid pollution Effect

Active Publication Date: 2011-08-17
CSIC NO 12 RES INST
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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 provide a method for preparing an environment-friendly micro-arc oxidation black ceramic film on the surface of an aluminum alloy, which solves the problem that the existing micro-arc oxidation-treated aluminum alloy ceramic film has a single color and is not widely used. Salt electrolyte is not environmentally friendly

Method used

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  • Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface
  • Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface
  • Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface

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Embodiment 1

[0032] Configure aluminum alloy micro-arc oxidation oxidation solution, take deionized water and pour it into the oxidation tank, according to the volume of deionized water added, add the following reagents at room temperature with mass / volume concentration: sodium hexametaphosphate 1g / L, Sodium silicate 1g / L, potassium hydroxide 0.5 / L, sodium fluoride 0.2 / L, stir and mix them evenly to obtain the micro-arc oxidation basic electrolyte; then add ferric ammonium oxalate 0.5g / L to the electrolyte, stir and mix uniform.

[0033] Process the ZL101A aluminum alloy into a rectangular parallelepiped sample of 80×45×6mm, deburr the edges, polish with water-grinding sandpaper (400#→600#→800#→1000#) sequentially, degrease the surface with acetone, or use a concentration of 50g / L sodium hydroxide solution is used to clean and remove oil by ultrasonic vibration at 60°C. The degreased aluminum alloy is washed with deionized water at 50°C-60°C. The obtained aluminum alloy samples after was...

Embodiment 2

[0035] Configure aluminum alloy micro-arc oxidation oxidation solution, take deionized water and pour it into the oxidation tank, according to the volume of deionized water added, add the following reagents at room temperature with mass / volume concentration: sodium hexametaphosphate 3g / L, Sodium silicate 1.5g / L, potassium hydroxide 1g / L, sodium fluoride 0.5g / L, stir and mix them evenly to obtain the micro-arc oxidation basic electrolyte; then add ferric ammonium oxalate 5g / L to the electrolyte, stir well mixed.

[0036] Process the ZL101A aluminum alloy into a rectangular parallelepiped sample of 80×45×6mm, deburr the edges, polish with water-grinding sandpaper (400#→600#→800#→1000#) sequentially, degrease the surface with acetone, or use a concentration of 50g / L sodium hydroxide solution is used to clean and remove oil by ultrasonic vibration at 60°C. The degreased aluminum alloy is washed with deionized water at 50°C-60°C. The obtained aluminum alloy samples after washing ...

Embodiment 3

[0038] Configure aluminum alloy micro-arc oxidation oxidation solution, take deionized water and pour it into the oxidation tank, according to the volume of deionized water added, add the following reagents at room temperature with mass / volume concentration: sodium hexametaphosphate 5g / L, Sodium silicate 2g / L, potassium hydroxide 1.5 / L, sodium fluoride 1 / L, stir and mix them evenly to obtain the basic electrolyte of micro-arc oxidation; then add ferric ammonium oxalate 10g / L to the electrolyte, stir and mix evenly .

[0039] Process the ZL101A aluminum alloy into a cuboid sample of 80×45×6mm, deburr the edges, polish with water-grinding sandpaper (400#→600#→800#→1000#), degrease the surface with acetone, or use a concentration of 50g / L sodium hydroxide solution is used to clean and remove oil by ultrasonic vibration at 60°C. The degreased aluminum alloy is washed with deionized water at 50°C-60°C. The obtained aluminum alloy samples after washing were connected with aluminum...

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Abstract

The invention discloses a method for preparing an environment-friendly micro-arc oxidation black ceramic film on an aluminum alloy surface, and the method comprises the following steps: firstly, pouring deionized water into an oxidation tank, weighing 1-10g / L of sodium hexametaphosphate, 1-3g / L of sodium silicate, 0.5-2g / L of potassium hydroxide, 0.2-2g / L of sodium fluoride and 0.5-20g / L of ferric ammonium oxalate in terms of the volume of the added deionized water, and uniformly stirring and mixing the sodium hexametaphosphate, the sodium silicate, the potassium hydroxide and the sodium fluoride to obtain a micro-arc oxidation base electrolyte; adding the weighed ferric ammonium oxalate into the base electrolyte, and stirring and mixing uniformly to obtain an aluminum alloy micro-arc oxidant solution; and then, sequentially carrying out surface deoiling and cleaning, water washing, aluminum alloy micro-arc oxidation, sealing and drying on the aluminum alloy to prepare the environment-friendly micro-arc oxidation black ceramic film on the aluminum alloy surface. By means of the preparation method disclosed by the invention, the problems of single color, limited application range, and environment pollution caused by a vanadate electrolyte, of the existing aluminum alloy ceramic film layer, are solved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy surface treatment, and relates to a surface treatment method for commonly used aluminum alloys, in particular to a method for preparing an environment-friendly micro-arc oxidation black ceramic film on the surface of an aluminum alloy. Background technique [0002] Aluminum and its alloys are well known for their light weight, high specific strength, easy processing and good thermal conductivity, and are widely used in many industrial sectors such as aviation, aerospace, military and civil, but their hardness is low and wear-resistant Poor performance and corrosion resistance limit its application range. For some applications, the requirements of high temperature resistance, corrosion resistance, fatigue resistance, temperature sudden change resistance and high temperature air erosion resistance cannot be met. Therefore, the aluminum alloy must be treated with anti-corrosion surface. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06
Inventor 穆耀钊杨艳张镜斌王育召孙长涛
Owner CSIC NO 12 RES INST
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