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Magnesium and lithium alloy surface compound oxidation treatment method

A technology of magnesium-lithium alloy and treatment method, which is applied in the direction of anodic oxidation, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems that cannot meet the requirements of electrical conductivity and corrosion resistance at the same time, and achieve good electromagnetic shielding effect and good electrical conductivity of the workpiece , The effect of simple process

Active Publication Date: 2020-04-10
郑州轻研合金科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the purpose of this application is to propose a conductive oxidation composite micro-arc oxidation treatment method on the surface of magnesium-lithium alloy parts, which can solve the problem that the prior art cannot satisfy both electrical conductivity and corrosion resistance

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  • Magnesium and lithium alloy surface compound oxidation treatment method
  • Magnesium and lithium alloy surface compound oxidation treatment method
  • Magnesium and lithium alloy surface compound oxidation treatment method

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Embodiment 1

[0027] A composite oxidation treatment method for the surface of a magnesium-lithium alloy, specifically comprising the following steps, the model of the magnesium-lithium alloy used in this embodiment is LAZ931:

[0028] (1) Cleaning and pretreatment of the surface of the magnesium-lithium alloy substrate: use metallographic sandpaper of models 800#, 1000#, 2000#, and 5000# to polish the surface of the magnesium-lithium alloy to the mirror surface, then polish it with a cloth wheel, and use detergent to polish it. The surface of the finished workpiece is degreased, and finally ultrasonically cleaned with distilled water to remove the oil and oxide film on the surface of the magnesium-lithium alloy;

[0029] (2) Conductive oxidation treatment: place the surface-cleaned magnesium-lithium alloy substrate in a conductive oxidation solution for conductive oxidation treatment. After treatment, rinse the magnesium-lithium alloy parts with deionized water and dry them; The concentrat...

Embodiment 2

[0034] A method for composite oxidation treatment of the surface of a magnesium-lithium alloy, specifically comprising the following steps, the model of the magnesium-lithium alloy used in this embodiment is LA141:

[0035] (1) Cleaning and pretreatment of the surface of the magnesium-lithium alloy substrate: use metallographic sandpaper of models 800#, 1000#, 2000#, and 5000# to polish the surface of the magnesium-lithium alloy to the mirror surface, then polish it with a cloth wheel, remove oil, and finally Ultrasonic cleaning with distilled water to remove oil and oxide film on the surface of the magnesium-lithium alloy;

[0036](2) Conductive oxidation treatment: place the surface-cleaned magnesium-lithium alloy substrate in a conductive oxidation solution for conductive oxidation treatment. After treatment, rinse the magnesium-lithium alloy parts with deionized water and dry them; The concentration of each component is K 2 CrO 7 30g / L, (NH 4 ) 2 SO 4 3g / L, NaF 3g / L...

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Abstract

The invention belongs to the technical field of magnesium and lithium alloy surface treatment and particularly relates to a magnesium and lithium alloy surface compound oxidation treatment method. Themethod includes the steps that surface cleaning pretreatment is conducted on a magnesium and lithium alloy firstly; then the magnesium and lithium alloy is put into an electric conduction oxidation solution to generate an electric conduction oxidation film, and a special tool is adopted for protecting the position, wherein an electric conduction layer needs to be reserved, of the magnesium and lithium alloy; and then micro-arc oxidation treatment is conducted, micro-arc oxidation treatment is conducted with the magnesium and lithium alloy adopted as the anode and a stainless steel plate adopted as the cathode, a porcelain compact layer is formed, and an electric conduction oxidation micro-arc oxidation film coating is obtained. Local electric conductivity of a part is reserved due to theobtained coating, and meanwhile corrosion resistance is also greatly improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium-lithium alloy surface treatment, and in particular relates to a composite oxidation treatment method for the surface of magnesium-lithium alloy. Background technique [0002] Magnesium-lithium alloy products are ultra-light materials with special physical properties and properties. They have high specific strength, high specific modulus, and excellent rigidity, shock absorption, and electromagnetic shielding properties, making this material the metal with the most potential for weight reduction Structural materials can replace some aluminum alloys and magnesium alloys in secondary load-bearing structures. At present, my country has listed the development of new practical magnesium alloys as the focus of future scientific and technological development and research. With the deepening of research and breakthroughs in some technical problems, magnesium-lithium alloys are showing their unique advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30
CPCC25D11/024C25D11/026C25D11/30
Inventor 郭晓光刘金学肖阳章文捷解海涛张小兵马静
Owner 郑州轻研合金科技有限公司
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