Magnesium alloy surface conductive corrosion-resistant coating, preparation method and modified magnesium alloy
By preparing a three-layer structural coating on the surface of magnesium alloy, the problem that the existing magnesium alloy surface protective coating cannot have both corrosion and conductivity, and the safe application of magnesium alloy in electronic equipment is achieved.
CN120384293APending Publication Date: 2025-07-29TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Patent Information
- Application Number
- CN202510630589.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-07-29
AI Technical Summary
Technical Problem
The existing magnesium alloy surface protective coating technology cannot have both anti-corrosion and conductive functions, which limits the application of magnesium alloys in areas where conductive properties are required and may cause safety hazards.
Method used
Microarc oxidation method was used to prepare a low-porosity MAO coating as the bottom layer, and conducting conductive nanoparticles and zinc oxide aluminum oxide conductive layer were prepared by combining negative pressure sealing and vapor-phase hydrothermal deposition to form a three-layer structural coating.
Benefits of technology
It improves the bonding strength and conductivity of magnesium alloys, enhances corrosion resistance, and ensures the safe and reliable operation of the equipment.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the technical field of metal material surface modification, and particularly relates to a magnesium alloy surface conductive corrosion-resistant coating and a preparation method, the conductive corrosion-resistant coating comprises a three-layer structure, the total coating thickness is 33-50 microns, the bottom coating is a low-porosity MAO coating prepared through a micro-arc oxidation method, and the thickness is 20-35 microns; the middle coating is a conductive nano-particle layer prepared by adopting a negative pressure mode; and the top coating is a zinc aluminum oxide conductive layer prepared by adopting a vapor-phase hydrothermal deposition method, and the thickness of the top coating is 13-15 microns. In addition, the invention provides the modified magnesium alloy with the conductive corrosion-resistant coating prepared on the surface, the self-corrosion current density of the modified magnesium alloy is 0.18-1.8 * 10 <-7 > A / cm < 2 >, and the volume resistivity of the modified magnesium alloy is 1.30-5.21 * 10 < 4 > omega.m.
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