Magnesium alloy surface treatment micro-arc oxidation electrolyte and preparation method of micro-arc oxidation film layer

CN119352130AActive Publication Date: 2025-01-24DALIAN UNIV OF TECH
6 Cites 1 Cited by

Patent Information

Application Number
CN202411471380.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-01-24
Estimated Expiration
2044-10-22

AI Technical Summary

Technical Problem

In the surface treatment of magnesium alloy, the existing microarc oxidation electrolyte results in poor corrosion resistance and wear resistance of the oxide film, and there are a large number of micropores and microcrack defects, affecting the corrosion and wear resistance of magnesium alloys.

Method used

An aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride and titanium boron carbon nitrogen conductive nanoparticles is used as the micro-arc oxidation electrolyte for surface treatment of magnesium alloys. The uniformity and conductivity of the electrolyte are improved through ultrasonic dispersion treatment, thereby Improve the microstructure of the micro-arc oxidation coating.

Benefits of technology

A significant improvement of the hardness and abrasion resistance of the micro -alloy surface of the magnesium alloy surface, reducing the pore rate and pore diameter ratio, significantly improved the corrosion resistance and abrasion resistance of magnesium alloy, and prolonged its service life.

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Abstract

The invention provides a magnesium alloy surface treatment micro-arc oxidation electrolyte and a preparation method of a micro-arc oxidation film layer. The magnesium alloy surface treatment micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride and titanium-boron-carbon-nitrogen conductive nanoparticles; or an aqueous solution containing sodium silicate, potassium hydroxide, potassium fluoride and titanium-boron-carbon-nitrogen conductive nanoparticles. The invention further discloses a method for preparing a micro-arc oxidation film layer by adopting the magnesium alloy surface treatment micro-arc oxidation electrolyte. According to the magnesium alloy surface treatment micro-arc oxidation electrolyte, conductive ceramic nanoparticles-titanium-boron-carbon-nitrogen conductive nanoparticles are added into the magnesium alloy surface treatment micro-arc oxidation electrolyte, so that the micro-structure of a micro-arc oxidation film layer on the magnesium alloy surface can be improved when the magnesium alloy surface treatment micro-arc oxidation electrolyte is used for performing micro-arc oxidation reaction on the magnesium alloy surface, and meanwhile, the corrosion resistance and the wear resistance of the magnesium alloy subjected to micro-arc oxidation treatment are improved; the surface protection capability of the magnesium alloy is greatly improved and the service life of the magnesium alloy is prolonged.
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Citation Information

Patent Citations

  • Method for plating titanium boron carbonitride (Ti(B, C, N) ceramic thin film on surface of substrate

    CN104233280A

  • Preparation method of microarc oxidation film doped ceramic micropowder on aluminum drill pipe surface

    CN104775144A

  • Micro-arc oxidation electrolyte of magnesium alloy, preparation method of electrolyte and surface treatment method of magnesium alloy

    CN109252201A

  • Method for preparing metal-based composite coating on surface of stainless steel

    CN112779533A

  • Preparation method of wear-resistant and corrosion-resistant ceramic layer on surface of magnesium alloy

    CN117904685A

Cited By

  • Conductive micro-arc oxidation coating of magnesium alloy as well as preparation method and application of conductive micro-arc oxidation coating

    CN122147482A