Surface treatment method for rare earth magnesium alloy product

A technology of surface treatment and surface treatment liquid, applied in the direction of anodization, etc., can solve the problems of unstable surface treatment liquid, unstable performance of surface treatment liquid, production and application constraints of surface treatment liquid, etc.

Active Publication Date: 2015-01-28
YANGZHOU UNIV
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Problems solved by technology

However, it is still difficult to meet the requirements for use under harsh conditions in practical applications
[0011](2) The existing rare earth magnesium alloy electrochemical oxidation-chemical deposition coupling technology also generally suffers from unstable performance of the surface treatment solution: affecting the performance of the rare earth magnesium alloy anodic oxide film There are many factors, such as: surface treatment liquid composition and concentration, power supply type and parameters, pH value, temperature, film forming time, stirring method and intensity, etc.
The traditionally used rare earth magnesium alloy electrochemical oxidation-chemical deposition coupling technology contains chromium, fluorine, cyanide, et

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  • Surface treatment method for rare earth magnesium alloy product

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Embodiment 1

[0067] A method for surface treatment of Mg-La rare earth magnesium alloy products, comprising the steps of:

[0068] (1) Preparation of surface treatment solution: There are many factors that affect the surface film properties of rare earth magnesium alloys. The film forming time and so on have an influence on the properties of the obtained surface film. Among them, the composition and concentration of the surface treatment solution are the most important factors affecting the composition and performance of the rare earth magnesium alloy surface film. The traditionally used electrochemical oxidation deposition coupling technology for magnesium alloys contains chromium, fluorine, and cyanide plasma, which seriously endanger human health and the ecological environment, and restrict the production and application of surface treatment fluids. Therefore, in the present embodiment, in a stirred tank, water and sulphate are cerium (Ce) and the concentration of rare earth ions is fo...

Embodiment 2

[0073] A method for surface treatment of Mg-Ce rare earth magnesium alloy products, comprising the steps of:

[0074] (1) Preparation of surface treatment solution: There are many factors that affect the surface film properties of rare earth magnesium alloys. The film forming time and so on have an influence on the properties of the obtained surface film. Among them, the composition and concentration of the surface treatment solution are the most important factors affecting the composition and performance of the rare earth magnesium alloy surface film. The traditionally used electrochemical oxidation deposition coupling technology for magnesium alloys contains chromium, fluorine, and cyanide plasma, which seriously endanger human health and the ecological environment, and restrict the production and application of surface treatment fluids. Therefore, the present invention is in stirred tank, and water, sulfate are the rare earth sulfate of cerium (Ce) and lanthanum (La), and ...

Embodiment 3

[0079] A method for surface treatment of Mg-Sm rare earth magnesium alloy products, comprising the steps of:

[0080] (1) Preparation of surface treatment solution: There are many factors that affect the surface film properties of rare earth magnesium alloys. The film forming time and so on have an influence on the properties of the obtained surface film. Among them, the composition and concentration of the surface treatment solution are the most important factors affecting the composition and performance of the rare earth magnesium alloy surface film. The traditionally used electrochemical oxidation deposition coupling technology for magnesium alloys contains chromium, fluorine, and cyanide plasma, which seriously endanger human health and the ecological environment, and restrict the production and application of surface treatment fluids. Therefore, the present invention is in stirred tank, and water, vitriol are the rare earth vitriol that forms in cerium (Ce) and yttrium (Y)...

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Abstract

The invention provides a surface treatment method for a rare earth magnesium alloy product. The method comprises the following steps: (1) preparing surface treatment liquid: in preparation equipment of the surface treatment liquid, preparing water and a rare earth sulfate into an aqueous solution; then, adding magnesium oxide into the rare earth sulfate aqueous solution; and then, adding any one or two of aluminum sulfate and zinc sulfate into the solution to prepare the surface treatment liquid; (2) carrying out surface pre-treatment on the rare earth magnesium alloy product; (3) carrying out electrochemical oxidation-chemical deposition coupling technique: in an electrochemical oxidation-chemical deposition treatment reactor, carrying out the electrochemical oxidation-chemical deposition coupling technique on the surface of the rare earth magnesium alloy product; and (4) carrying out surface post-treatment on the rare earth magnesium alloy product. A corrosion-resistant, antioxidant, flame-retardant, smooth and compact protective film is generated on the surface of the rare earth magnesium alloy product.

Description

technical field [0001] The invention belongs to the field of rare earth magnesium alloy product manufacturing technology and material surface treatment technology, and particularly relates to a rare earth magnesium alloy product surface treatment method. Background technique [0002] Magnesium alloy products have been widely used in aerospace, automotive, electronics, machinery, military, etc. and the nuclear industry. However, due to the high chemical activity of magnesium, the standard equilibrium potential is very negative (-2.36V), and the resulting problems of corrosion resistance, flame retardancy and oxidation resistance of the products have become the main bottleneck restricting the wide application of magnesium and its alloys. Therefore, improving the corrosion resistance, flame retardancy and oxidation resistance of rare earth magnesium alloys has important application value. [0003] Since the late 1980s, with the application of magnesium alloys in the aviation ...

Claims

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Application Information

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IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 王雅琼李伟亮孙晓勇范春红许文林
Owner YANGZHOU UNIV
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