镁合金表面含ZrO2微弧氧化复合膜层的研究进展

唐明奇, 辛畅, 胡俊华, 冯在强, 李刚, 张伟

doi:10.16577/j.issn.1001-1560.2023.0095

材料保护 >

2023 , Vol. 56 >Issue 4: 138 - 148

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0095

综述

镁合金表面含ZrO₂微弧氧化复合膜层的研究进展

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¹华北水利水电大学材料学院； ²郑州大学材料科学与工程学院； ³河南裕展精密科技有限公司

唐明奇(1980-)，博士，教授，主要从事微弧氧化、激光和等离子熔覆等材料表面处理技术研究，E-mail:tangmq 400＠163.com

收稿日期: 2022-10-25

修回日期: 2022-11-20

录用日期: 2022-12-15

网络出版日期: 2023-08-04

基金资助

河南省自然科学基金项目(212300410371)；华北水利水电大学材料学院客座教授专项资金

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Study Progress of ZrO₂-Containing Micro-Arc Oxidation Composite Coatings on Surface of Magnesium Alloys

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(1.School of Materials Science and Engineering，North China University of Water Resources and Electric Power，Zhengzhou 450045，China；
2.School of Materials Science and Engineering，Zhengzhou University，Zhengzhou 450001，China；3.Henan Yuzhan Precision Technology Co.，Ltd.，Zhengzhou 451100，China)

Received date: 2022-10-25

Revised date: 2022-11-20

Accepted date: 2022-12-15

Online published: 2023-08-04

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摘要

镁合金耐蚀性差，极大限制了其在易腐蚀环境中的应用。微弧氧化能够在镁合金表面制备一层类陶瓷氧化膜，能有效提高其耐蚀性。受微弧氧化成膜机理的影响，膜层中往往存在大量孔洞和裂纹；并且通常氧化膜主要由MgO 组成，在潮湿或酸性环境中会吸水或溶解，导致膜层的耐蚀性不理想。将具有优良化学稳定性和高硬度的ZrO2引入镁合金微弧氧化膜中，获得主要由ZrO2构成或含ZrO2的氧化膜，同时减少膜层中缺陷，能够提高其对镁合金基体的保护效果。从镁合金微弧氧化电解液、电参数、两步微弧氧化工艺及与其他表面处理技术相结合的4个方面概述了含ZrO2微弧氧化复合膜层的制备工艺、成膜机制及耐蚀性等方面研究的进展，同时分析了各自存在的问题及不足。未来有必要优化制备含ZrO2微弧氧化膜的电解液的组成，以保证其稳定性和有效性，并明确使用过程中电解液各成分的消耗和补充规律。进一步研究两步微弧氧化工艺，获得对镁合金基体有更好保护作用的复合膜层。探索将微弧氧化与其他表面处理技术相结合，综合利用2 种技术及膜层的优点。根据ZrO2在不同温度下的结构变化，可以进一步分析微弧氧化过程中的温度场分布和膜层形成机理。

关键词： 镁合金; 微弧氧化; ZrO2; 复合膜层; 耐蚀性

本文引用格式

唐明奇, 辛畅, 胡俊华, 冯在强, 李刚, 张伟 . 镁合金表面含ZrO₂微弧氧化复合膜层的研究进展[J]. 材料保护, 2023 , 56(4) : 138 -148 . DOI: 10.16577/j.issn.1001-1560.2023.0095

Abstract

Poor corrosion resistance of magnesium alloys dramatically limits their application in corrosive environments.Microarc oxidation(MAO) technology can prepare a ceramic-like coating on the surface of magnesium alloy，which is an effective method to improve its corrosion resistance.Due to the film formation mechanism of MAO technology，there are many pores and cracks in the coating，and usually the coating is mainly composed of MgO，which would absorb water or deliquesce in wet and acidic environments，making the coating present bad corrosion resistance.Incorporating ZrO2 with excellent chemical stability and high hardness into magnesium alloy MAO coating to obtain a coating mainly composed of ZrO2 or a ZrO2-containing coating can improve the protection effect on the substrate.This paper reviewed the research progresses of the preparation technology，film formation mechanism and corrosion resistance of ZrO2-containing MAO composite coatings on magnesium alloys from the aspects of electrolyte，electric parameter，two-step MAO process，and combining MAO with other surface treatment techniques.In addition，the problems and shortcomings of each research direction were analyzed.In the future，it is necessary to optimize the electrolyte composition to ensure its stability and effectiveness and clarify the consumption and replenishment rules of each electrolyte component during the usage.The two-step MAO process should be further studied to obtain a composite MAO coating with better protection effect on the magnesium alloy matrix.Combination of MAO and other surface treatment techniques should be explored to utilize the advantages of two technologies and coatings comprehensively.The temperature field distribution and MAO coating forming mechanism can be further analyzed based on the structure transformation of ZrO2 at different temperatures.

Key words： magnesium alloy; microarc oxidation; ZrO2; composite coating; corrosion resistance

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