Method for growing blue ceramic film layer in situ on the surface of aluminum alloy and aluminum matrix composite material

An aluminum-based composite material, in-situ growth technology, applied in the direction of anodization, etc., can solve the problems of blue ceramic film layer that cannot be uniform in color, rapid failure of electrolyte, and inability to be used repeatedly, and achieves stable electrolyte. High wear resistance and excellent wear resistance

Inactive Publication Date: 2011-12-28
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing micro-arc oxidation method cannot prepare a blue ceramic film layer with uniform color on the surface of aluminum alloy and aluminum matrix composite material, and the electroly

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  • Method for growing blue ceramic film layer in situ on the surface of aluminum alloy and aluminum matrix composite material
  • Method for growing blue ceramic film layer in situ on the surface of aluminum alloy and aluminum matrix composite material

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specific Embodiment approach 1

[0016] Specific Embodiment 1: This embodiment is a method for in-situ growth of a blue ceramic film on the surface of an aluminum alloy and an aluminum-based composite material, which is achieved through the following steps: 1. Clean the surface of the aluminum substrate to remove surface oil and impurities, The aluminum substrate is an aluminum alloy or an aluminum-based composite material; 2. Prepare the electrolyte: the concentration of the main film-forming agent is 1g / L-50g / L, the concentration of the coloring additive is 1g / L-50g / L, and the auxiliary film-forming The concentration of the agent is 0g / L-40g / L and the concentration of the complexing agent is 0g / L-20g / L. Weigh the main film-forming agent, coloring additive, auxiliary film-forming agent, complexing agent and water respectively to prepare the electrolyte. Wherein, the main film-forming agent is one or a combination of phosphoric acid, sulfuric acid and citric acid, and the coloring additive is an inorganic or o...

specific Embodiment approach 2

[0020] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the specific method for cleaning the surface of the aluminum substrate in step 1 is: place the aluminum substrate in ethanol or acetone, and clean and remove the oil and impurities on the surface of the aluminum substrate , and then polished to remove the oxide film. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the aluminum substrate in step one is an aluminum alloy with a grade of LY12, LF3, LD11, LC4, Zl101 or L3, or is made of silicon carbide or aluminum borate , Magnesium borate or alumina as reinforcement reinforced aluminum matrix composites. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for in-situ growth of a blue ceramic film layer on the surface of an aluminum alloy and an aluminum-based composite material, relating to a method for preparing a blue ceramic film layer on an aluminum alloy and an aluminum-based composite material. The method solves the problem that the existing micro-arc oxidation method cannot prepare a blue ceramic film layer with uniform color on the surface of aluminum alloy and aluminum-based composite material, and the electrolyte used to prepare the blue ceramic film fails quickly and cannot be used repeatedly. 1. Prepare an electrolyte solution, which contains at least a main film-forming agent and a coloring additive, and the main film-forming agent is one of phosphoric acid, sulfuric acid and citric acid or a combination of several of them; 2. The cleaned aluminum base Fix the material in the electrolyte, turn on the power, and oxidize. The blue CoAl2O4 is evenly distributed in the blue ceramic film layer obtained on the surface of the aluminum substrate, and the blue color is uniform and beautiful. The bonding strength between the ceramic film layer and the aluminum substrate is high, and it has excellent wear resistance, corrosion resistance and heat resistance. The integrated preparation of decorative and structural coatings is realized.

Description

technical field [0001] The invention relates to a method for preparing a blue ceramic film layer on an aluminum alloy and an aluminum-based composite material. Background technique [0002] Aluminum is an important metal material second only to steel, and is widely used in aerospace, transportation, printing, construction and other fields. However, aluminum materials have the disadvantages of single appearance, soft texture and easy corrosion in humid atmosphere, which makes it difficult to meet the decorative and strong weather resistance requirements of aerospace industry, nautical industry, automobile industry and construction industry. In order to improve the decorative effect of aluminum materials, enhance corrosion resistance and prolong service life, aluminum materials generally have to be surface treated. Aluminum materials with blue surface decoration generally adopt anodic oxidation / chemical dyeing technology. The interior of the membrane, thus obtaining the alum...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D11/06
Inventor 王志江姜兆华
Owner HARBIN INST OF TECH
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