Corrosion Evolution of High-Strength Aluminum Alloys in the Simulated Service Environment of Amphibious Aircraft in the Presence of Chloride and Bisulfite

作     者：Feng Ge Lin Fan Jianming Liang Kun Pang Han Li Xin Wang Zhongyu Cui Feng Ge;Lin Fan;Jianming Liang;Kun Pang;Han Li;Xin Wang;Zhongyu Cui

作者机构：School of Materials Science and EngineeringOcean University of ChinaQingdao 266100China State Key Laboratory for Marine Corrosion and ProtectionLuoyang Ship Material Research Institute(LSMRI)Qingdao 266237China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2021年第34卷第12期

页      面：1679-1694页

核心收录：

学科分类：080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 082503[工学-航空宇航制造工程] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

基　　金：The authors wish to acknowledge the financial support of the Natural Science Foundation of China(No.51931008) the Ministry of Industry and Information Technology Project(No.MJ-2017-J-99),and the Shandong Provincial Key R&D plan(No.2019GHY112050) 

主　　题：High-strength aluminum alloy Atmospheric corrosion HSO_(3)^(-) Intergranular corrosion Exfoliation corrosion 

摘      要：The corrosion evolution of 2024-T351 and 7075-T651 aluminum alloys in the thin electrolyte layer(TEL)and wet-dry alternating cycle(WDAC)environment is studied in this *** results show that in the TEL environment,the competitive effect between H+that accelerates corrosion reactions and deposition of aluminum sulfate that impedes corrosion attacks exists during the corrosion *** difference is that with increasing HSO_(3)^(-),subsurface intergranular corrosion on 2024-T351 is promoted to form exfoliation corrosion eventually and the degree of exfoliation corrosion begins to decrease because the blocking effect of aluminum sulfate exceeds the expediting effect of H+.For 7075-T651,the corrosion area and the corrosion diameter decrease gradually,which is attributed to the HSO_(3)^(-)-enhanced deposition of corrosion products and their blocking *** the WDAC environment,the corrosion processes of 2024-T351 and 7075-T651 are the acidic dissolution of the matrix during the soaking *** the HSO_(3)^(-)concentration is high enough(0.1 M),the inhibiting effect of aluminum sulfate becomes the dominant factor.