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Method in use for treating surface of workpiece in magnesium alloy

A technology of workpiece surface, magnesium alloy, applied in metal material coating process, fusion spraying, coating and other directions, can solve the problems of poor corrosion resistance of magnesium alloy, easy peeling off of protective layer, low bonding force, etc., to achieve corrosion resistance. High, easy to operate, strong binding effect

Inactive Publication Date: 2005-01-12
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of magnesium alloy is poor, which has become the biggest obstacle to its application
The surface treatment methods of magnesium alloys mostly adopt chemical conversion coating and micro-arc anodization to form organic coatings and coatings, etc. Since the protective layer and the substrate are mostly non-metallurgical bonds, the bonding force is very low, the protective layer is easy to fall off, and it is easy to cause damage. environmental pollution

Method used

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Examples

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Embodiment Construction

[0010] The invention is a method for surface treatment of magnesium alloy workpieces. The surface of magnesium alloy workpieces to be sprayed is subjected to sandblasting treatment in advance. The sandblasting treatment uses clean and dry corundum sand with a particle size of 0.8-1.5mm. Spraying treatment shall be carried out within 2 hours after sandblasting treatment. Before spraying, the magnesium alloy workpiece shall be preheated at a temperature of 250°C, and high-purity aluminum wire shall be used to spray on the surface of the magnesium alloy workpiece to form an aluminum coating. On the magnesium alloy workpiece After the aluminum coating is sprayed on the surface, heat preservation treatment at 410-430°C for 2-3 hours. Finally, use absolute ethanol as a diluent and air-drying phenolic resin as a sealing agent for sealing treatment, the volume ratio of the two is 1:1-1:2, and then bake in a heat treatment furnace at 100-150°C 5-30min to make the sealing agent solidify...

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Abstract

A method used in Mg alloy work piece surface process is first of all to blast sand to the being sprayed Mg alloy work piece surface, then to spray within 2 hours after the sane blast; first preheating then spraying the surface with pure Al wire to form an Al coating, after that put it for thermal insulation under 410-430deg.C finally sealing it with diluent and sealing agent then to bake it in a heat process furnace to solidize the agent. A smelt connection is formed between the Al layer and the Mg alloy matrix.

Description

technical field [0001] The invention relates to the plating of materials with metal materials, which is a spraying method of molten cladding materials. Background technique [0002] As the lightest metal structural material, magnesium alloy has many excellent properties, and is known as the most promising green structural material in the 21st century. But the corrosion resistance of magnesium alloy is poor, which has become the biggest obstacle to its application. The surface treatment methods of magnesium alloys mostly adopt chemical conversion coating and micro-arc anodization to form organic coatings and coatings, etc. Since the protective layer and the substrate are mostly non-metallurgical bonds, the bonding force is very low, the protective layer is easy to fall off, and it is easy to cause damage. environmental pollution. Contents of the invention [0003] The purpose of the present invention is to provide a method for surface treatment of magnesium alloy workpiec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/131
Inventor 马颖李元东陈体军梁永政阎峰云郝远
Owner LANZHOU UNIVERSITY OF TECHNOLOGY