Method for coating film on magnesium alloy plate by microarc oxidation
A magnesium alloy plate, micro-arc oxidation technology, applied in anodizing and other directions, can solve the problems of magnesium and magnesium alloys with little effect on corrosion resistance, poor corrosion resistance, low hardness, etc., to achieve accurate data, not easy to fall off, film The effect of large layer thicknesses
Inactive Publication Date: 2012-10-03
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0003] Although magnesium and magnesium alloys have a wide range of uses, their weak strength, low hardness, and poor corrosion resistance have greatly limited their use.
[0004] How to improve the physical and chemical properties, mechanical properties, and expand the scope of application of magnesium and magnesium alloys has always been a topic of discussion in the field of science and technology, such as adding reinforcement materials during the smelting process of magnesium and magnesium alloys, and pressing magnesium and magnesium alloy materials , Rolling reinforced fiber layer, these methods have a significant effect on increasing the strength and hardness of magnesium and magnesium alloys, but have little effect on the corrosion resistance of magnesium and magnesium alloys
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[0087] The present invention will be further described below in conjunction with accompanying drawing:
[0088] figure 1 As shown in the figure, it is the coating state diagram of the magnesium alloy plate. The position and connection relationship of each part must be correct, and the operation should be carried out in sequence.
[0089] The amount of the chemical substance material used in the coating is determined according to a preset range, with grams, milliliters, and millimeters as measurement units.
[0090] The coating of the magnesium alloy plate is carried out in the cathode coating tank, the magnesium alloy plate is used as the anode, and the coating tank is used as the cathode, and it is completed in the electrolyte under the action of a DC electric field;
[0091] The cathode coating tank is rectangular, the lower part is the base 1, the cathode coating tank 4 is on the top of the base 1, the outside of the cathode coating tank 4 is covered by the insulating pla...
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Abstract
The invention relates to a method for coating a film on a magnesium alloy plate by microarc oxidation. According to the method, the film is coated on the magnesium alloy plate in electrolyte of sodium silicate, sodium tungstate, glycerol, sodium hydroxide and alumina hydrocolloid; during film coating, the film is coated in the electrolyte of sodium silicate, sodium tungstate, glycerol and sodium hydroxide under the action of pulse direct -current electric field; then alumina hydrocolloid is added to the electrolyte, and a composite film layer is formed on the surface of the magnesium alloy plate; the thickness of the film layer reaches 75 mu m; the composite film layer can be adhered firmly and is high in compactness and corrosion resistance, and few holes are formed on the surface of the composite film layer; the method for coating the film is advanced in process, data is detailed and accurate, the film layer is high in thickness, fixation performance and compactness and does not fall easily; and the invention provides an effective method for coating the film on the surface of the magnesium alloy plate.
Description
technical field [0001] The invention relates to a micro-arc oxidation coating method for a magnesium alloy plate, belonging to the technical field of anti-corrosion coating surface treatment for magnesium alloy plates. Background technique [0002] Magnesium and magnesium alloys are the most important non-ferrous light metals, and have broad application prospects in aerospace, electronics, automobile and other industrial fields. [0003] Although magnesium and magnesium alloys have a wide range of uses, their weak strength, low hardness, and poor corrosion resistance have greatly limited their use. [0004] How to improve the physical and chemical properties, mechanical properties, and expand the scope of application of magnesium and magnesium alloys has always been a topic of discussion in the field of science and technology, such as adding reinforcement materials during the smelting process of magnesium and magnesium alloys, and pressing magnesium and magnesium alloy mater...
Claims
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IPC IPC(8): C25D11/30
Inventor 田林海姚晓红张杨杨晓飞马永唐宾
Owner TAIYUAN UNIV OF TECH
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