Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating

A wear-resistant coating, magnesium alloy technology, applied in the direction of metal material coating process, coating, melt spraying, etc., can solve the problems of low bonding force and limited corrosion resistance, and achieve good corrosion resistance and wear resistance. Low cost and the effect of expanding the practical scope

Active Publication Date: 2013-08-21
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the corrosion resistance of the organic coating alone is limited, and the binding force is also low, so it can only be used as a short-term protective treatment, or coated on the surface of other conversion coatings as a composite coating

Method used

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  • Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating
  • Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating
  • Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating

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Embodiment 1

[0022] 1. The Al wire used for spraying is a commercially available solid wire with a diameter of 2.0mm and a purity greater than 99%;

[0023] 2. Preparation of FeAl powder core wire in the embodiment: the outer skin is a low-carbon steel strip with a specification of 12×0.3mm (12mm in width and 0.3mm in thickness), and the core of the wire is Al powder with a purity greater than 99%. , the particle size is 100-200 mesh, drawn and reduced to 2.0mm step by step; the filling rate is 20%.

[0024] 3. Magnesium alloy AZ31 is selected as the substrate, after being cleaned with acetone, sandblasting is carried out, the air pressure is 0.4MPa, and the particle size of brown corundum is 60 mesh;

[0025] 4. Arc spray the Al layer on the surface of AZ31, the process parameters are set as: voltage 28V, current 100A, atomization pressure 0.55MPa; each spraying time is 15s, spraying 5 times to get a coating thickness of about 200 microns;

[0026] 5. Arc spray the FeAl layer on the surf...

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Abstract

The invention provides a corrosion and wear resistant coating for a magnesium alloy surface and a preparation method of the corrosion and wear resistant coating, and belongs to the field of thermal spraying of material processing engineering. The corrosion and wear resistant coating is an Al-FeAl composite coating formed in a way that a FeAl coating is compounded on an Al bottoming layer. The preparation method comprises the following steps of: cleaning and roughening the magnesium alloy surface; and then depositing the Al-FeAl composite layer on the surface in an electric arc spraying way. The composite coating prepared by the preparation method is able to provide a coating with high resistance to corrosion and wear to the magnesium alloy surface; the composite coating has low cost, is hardly affected by the environment, and can reach the purposes of resource conservation, practicability, feasibility, and small effects of the environment, as well as the purpose of expanding the applicable scope of magnesium alloy.

Description

technical field [0001] The invention belongs to the field of thermal spraying in material processing engineering, and relates to a technology for depositing a new type of composite coating on the surface of a magnesium alloy. Using cheap arc spraying technology, cheap materials and suitable process parameters, wear-resistant and A coating with better corrosion resistance, the invention is mainly used in industrial fields such as wear resistance and corrosion resistance. Background technique [0002] Magnesium alloy has the advantages of light weight, easy recycling, high specific strength, electromagnetic shielding, and easy machining. It is known as "21st century green engineering material". Galvanic corrosion of metals leads to poor corrosion resistance of magnesium and magnesium alloys. [0003] Some surface protection methods are usually used to improve the corrosion resistance of magnesium alloys, such as thermal spraying, laser cladding, electrodeposition, micro-arc o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/02C23C4/131
Inventor 吴玉锋贺定勇彭怡刚王维章启军
Owner BEIJING UNIV OF TECH
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