汪路伟,潘力,李玉磊,刘家琴,吴玉程

• 1:合肥工业大学材料科学与工程学院
• 2:安徽粤辉煌智能装备股份有限公司
• 3:合肥工业大学机械工程学院
• 4:安徽省先进复合材料设计与加工工程研究中心

摘要(Abstract)：

为提升AZ31B镁合金的耐腐蚀性能与表面装饰性，在铝酸盐电解液中添加NH_4VO_3、Na_2WO_4和CuSO_4在其表面制备了黑色微弧氧化涂层。采用色差仪量化涂层颜色，利用扫描电镜(SEM)与能量色散X射线谱仪(EDS)表征涂层的微观形貌及元素分布，利用X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)分析涂层的物相组成，并通过电化学测试评估其耐腐蚀性能。结果表明：电解液中的CuSO_4参与微弧氧化反应生成CuO和CuAl_2O_4降低涂层色差及黑度值，NH_4VO_3和Na_2WO_4可抑制涂层泛红现象，生成的MgV_2O_4和WO_3可填充涂层孔隙，降低涂层的孔隙率；三元盐体系制备的涂层的腐蚀电流密度为3.98×10~(-9) A/cm~2(较未改性涂层降低2个数量级)、自腐蚀电位为-1.21 V、极化电阻为2866.89 kΩ·cm~2、低频区阻抗模值>1×10~6Ω·cm~2,均显著优于单一盐体系，涂层的耐腐蚀性能显著提升；三元盐复合改性策略实现了AZ31B镁合金表面防护性能与视觉美观度的双重优化，为兼具工程防护与装饰需求的镁合金表面处理提供了新技术方案。

关键词(KeyWords)： AZ31B镁合金;微弧氧化;黑色涂层;耐腐蚀性

Abstract:

Keywords:

基金项目(Foundation): 安徽省先进复合材料设计与加工工程中心开放课题(2407);; 企业委托项目(240937);; 国家清洁能源材料与技术学科创新引智计划项目(111,B0108)

作者(Author): 汪路伟,潘力,李玉磊,刘家琴,吴玉程

DOI: 10.13289/j.issn.1009-6264.2025-0170

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