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Preparation method of yellow corrosion-resistant ceramic membrane grown in situ on surface of aluminum matrix composite material

An aluminum-based composite material and in-situ growth technology, which is applied in the direction of surface reaction electrolytic coating, electrolytic coating, anodic oxidation, etc., can solve the problems such as the preparation method of corrosion-resistant micro-arc oxidation yellow ceramic film that is not publicly reported in the literature, and achieve improvement The effect of uniform hardness and color

Active Publication Date: 2019-09-20
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no literature that has publicly reported the preparation method of corrosion-resistant micro-arc oxidation yellow ceramic film on aluminum matrix composite materials

Method used

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  • Preparation method of yellow corrosion-resistant ceramic membrane grown in situ on surface of aluminum matrix composite material
  • Preparation method of yellow corrosion-resistant ceramic membrane grown in situ on surface of aluminum matrix composite material
  • Preparation method of yellow corrosion-resistant ceramic membrane grown in situ on surface of aluminum matrix composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Choose 7050 aluminum-based composite material (size 30mm×30mm×5mm) and use 180#, 320#, 800#, 1200# metallographic sandpaper to roughly grind and finely grind the aluminum-based composite material matrix to completely remove the surface oxide film , and then put it into acetone for ultrasonic cleaning for 5 minutes, degrease the surface of the polished substrate, and finally clean it with deionized water, and dry the cleaned aluminum-based composite material with a hair dryer for later use.

[0037] 2) Prepare the electrolyte: Use a graduated cylinder to measure 2L of deionized water and pour it into the micro-arc oxidation tank. Weigh 18g of sodium silicate with a concentration of 9g / L, 8g of sodium hydroxide with a concentration of 4g / L, and 4g of sodium hydroxide with a concentration of 2g. / L of disodium edetate and 6 g of potassium permanganate with a concentration of 3 g / L were added to deionized water in sequence, and stirred continuously during the addition to ...

Embodiment 2

[0042] 1) Choose 7050 aluminum-based composite material (size 30mm×30mm×5mm) and use 180#, 320#, 800#, 1200# metallographic sandpaper to roughly grind and finely grind the aluminum-based composite material matrix to completely remove the surface oxide film , and then put it into acetone for ultrasonic cleaning for 5 minutes, degrease the surface of the polished substrate, and finally clean it with deionized water, and dry the cleaned aluminum-based composite material with a hair dryer for later use.

[0043] 2) Prepare the electrolyte: use a graduated cylinder to measure 2L of deionized water and pour it into the micro-arc oxidation tank, weigh 24g of sodium silicate with a concentration of 12g / L, 12g of sodium hydroxide with a concentration of 6g / L, and 8g of sodium hydroxide with a concentration of 4g / L of disodium edetate and 10 g of potassium permanganate with a concentration of 5 g / L were added to deionized water in sequence, and stirred continuously during the addition t...

Embodiment 3

[0049] 1) Choose 7050 aluminum-based composite material (size 30mm×30mm×5mm) and use 180#, 320#, 800#, 1200# metallographic sandpaper to roughly grind and finely grind the aluminum-based composite material matrix to completely remove the surface oxide film , and then put it into acetone for ultrasonic cleaning for 5 minutes, degrease the surface of the polished substrate, and finally clean it with deionized water, and dry the cleaned aluminum-based composite material with a hair dryer for later use.

[0050] 2) Prepare the electrolyte: use a graduated cylinder to measure 2L of deionized water and pour it into the micro-arc oxidation tank, weigh 10g of sodium silicate with a concentration of 5g / L, 4g of sodium hydroxide with a concentration of 2g / L, and 1g of sodium hydroxide with a concentration of 0.5 g / L disodium edetate and 3 g potassium permanganate with a concentration of 1.5 g / L were added to deionized water in sequence, and stirred continuously during the addition to ful...

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Abstract

The invention discloses a preparation method of a yellow corrosion-resistant ceramic membrane grown in situ on the surface of an aluminum matrix composite material. The preparation method comprises the following steps: firstly, sequentially adding sodium silicate, sodium hydroxide, disodium edetate and potassium permanganate into deionized water, stirring uniformly, and taking the mixture solution as a micro-arc oxidation electrolyte; and then, pouring the electrolyte in a micro-arc oxidation electrolytic tank, taking an aluminum matrix composite material sample as an anode and a stainless steel plate as a cathode, and forming a yellow micro-arc oxidation membrane layer on the surface of the aluminum matrix composite material sample after micro-arc oxidation treatment. The prepared ceramic membrane well meets the market requirements for color diversification of the ceramic membrane, and the application limitations that the micro-arc oxidation ceramic membrane needs secondary coloring to obtain the surface color are broken. Meanwhile, the membrane layer has excellent corrosion resistance, a good technical background is provided for expansive application of the aluminum matrix composite material, and the preparation method is simple and convenient to implement.

Description

technical field [0001] The invention relates to an aluminum-based composite material surface treatment technology, in particular to a preparation method for in-situ growth of a yellow corrosion-resistant ceramic film on the surface of an aluminum-based composite material. Background technique [0002] In recent years, aluminum matrix composites have developed rapidly as new materials due to their excellent properties such as high specific strength, small thermal expansion coefficient, high temperature resistance, and high specific modulus. It is widely used in aviation, automobile, aerospace, advanced weapon system, ship and other fields. For example: the shell of the engine, the piston of the tank, the hub of the car and the steering knuckle, etc. are made of aluminum-based composite materials, which not only ensures the strength requirements, but also reduces the structural weight a lot. However, the shortcomings of single appearance and poor corrosion resistance of alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/14C25D11/06
CPCC25D11/026C25D11/024C25D11/14C25D11/06
Inventor 汪明亮黄杰陈哲吴一王浩伟
Owner SHANGHAI JIAO TONG UNIV
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