文献类型：期刊文献

英文题名：Research on the seawater corrosion resistance mechanism of 7075 aluminum alloy based on combination strengthened gradient surface construction

作者：Zhang, Ping[1];Yue, Xiujie[2,3];Jiang, Xiaomin[1];Sun, Yajie[1];Wang, Youqiang[2]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China;[2]Qingdao Univ Technol, Coll Intelligent Mfg, Qingdao 266520, Peoples R China;[3]Qingdao Huanghai Univ, Coll Intelligent Mfg, Qingdao 266520, Peoples R China

年份：2025

卷号：223

外文期刊名：MATERIALS CHARACTERIZATION

收录：SCI-EXPANDED(收录号：WOS:001456817000001)、、EI(收录号：20251318110562)、Scopus(收录号：2-s2.0-105000621633)、WOS

基金：Funding: The authors gratefully acknowledge the financial support provided by various organizations. In particular, they wish to thank the National Natural Science Foundation of China (Grant Nos. 51705270) and the Research Start-up Fund of Guangdong Ocean University.

语种：英文

外文关键词：7075-T6 aluminum alloy; Microbiological corrosion; Micro-organisational evolution; Electrochemical testing

外文摘要：This study investigates the seawater corrosion resistance mechanism of 7075 aluminum alloy by constructing a composite reinforced gradient surface. The research focuses on the impact of ultrasonic impact-solid shot peening and water jet (UIT-SPEWJ) combined surface modification on the seawater corrosion behavior of 7075T6 aluminum alloy in natural seawater environments. Surface morphology, microstructural characterization, and electrochemical corrosion tests were analyzed to understand these effects. The findings reveal that in the seawater corrosion environment, the surface of the 7075-T6 aluminum alloy was covered with blocky corrosion products. The UIT-SPEWJ combined surface modification led to grain refinement, increased grain numbers, and a notable reduction in electrochemical corrosion current density. A positive shift in corrosion potential and a larger capacitive arc radius were also observed. Among the modified samples, the UIT-SPEWJ method resulted in the lowest corrosion current density at 2.697E-6 A/cm2 and the most positive corrosion potential at -0.701 V. This combined surface modification approach significantly enhanced the seawater corrosion resistance of the 7075-T6 aluminum alloy.