Corrosion Behavior and Wear Characteristics of Micro-Arc Oxidation Coatings on 2195 Al-Li Alloy Modified by HCPEB

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Engineering and Performance Pub Date : 2026-07-13 DOI:10.1007/s11665-026-14570-y

Yuemei Qin, Chao Wu, Yunlong Wang, Feng Wang, Linzhong Zhu

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Abstract

Ceramic coatings were fabricated on 2195 aluminum-lithium alloy via micro-arc oxidation (MAO) and then modified by high-current pulsed electron beam (HCPEB) irradiation. The microstructure, corrosion behavior, and wear performance of the coatings were systematically investigated. The results indicate that α-Al₂O₃ remains the dominant phase both before and after HCPEB treatment. HCPEB treatment increases coating density and reduces porosity to 8.48%, while coating thickness remains nearly unchanged. Compared with the untreated substrate, the MAO-HCPEB coating exhibits approximately 85.56% reduction in corrosion pit depth, along with a notable reduction in corrosion area. Electrochemical tests reveal that both MAO and HCPEB treatments improve the corrosion resistance of the 2195 Al-Li alloy, and the MAO-HCPEB coating exhibits superior corrosion performance. In addition to enhanced corrosion resistance, the MAO-HCPEB coating also demonstrates superior tribological performance, which is mainly attributed to the reduced porosity. These results demonstrate that MAO-HCPEB composite surface modification can effectively endow 2195 Al-Li alloy with enhanced corrosion resistance, hardness, and wear resistance.

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HCPEB改性2195 Al-Li合金微弧氧化涂层的腐蚀行为和磨损特性

采用微弧氧化法（MAO）在2195铝锂合金表面制备陶瓷涂层，并用大电流脉冲电子束（HCPEB）辐照改性。系统地研究了涂层的显微组织、腐蚀行为和磨损性能。结果表明，在HCPEB处理前后，α-Al2O3仍然是主导相。HCPEB处理使涂层密度增加，孔隙率降低至8.48%，而涂层厚度基本保持不变。与未处理基体相比，MAO-HCPEB涂层的腐蚀坑深度降低了约85.56%，腐蚀面积也显著减小。电化学试验结果表明，MAO和HCPEB处理均能提高2195 Al-Li合金的耐蚀性，且MAO-HCPEB涂层具有更好的耐蚀性能。除了增强耐腐蚀性外，MAO-HCPEB涂层还表现出优异的摩擦学性能，这主要归功于降低了孔隙率。结果表明，MAO-HCPEB复合表面改性能有效提高2195 Al-Li合金的耐蚀性、硬度和耐磨性。

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来源期刊

Journal of Materials Engineering and Performance 工程技术-材料科学：综合

CiteScore

3.90

自引率

13.00%

发文量

1120

审稿时长

4.9 months

期刊介绍： ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance. The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication. Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered