Different effects of TiB2 particles on corrosion behaviors of in-situ TiB2/ 7075 composites in active and passive environments

被引：7
作者：
Li, Keneng [1 ]
Wang, Zhiping [2 ]
Wang, Fangming [3 ]
Geng, Jiwei [1 ]
Li, Yugang [1 ,4 ]
Xia, Peikang [1 ,4 ]
Chen, Dong [1 ,4 ]
Wang, Haowei [1 ,4 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[2] Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
[3] CNPC Engn Technol R&D Co Ltd, Beijing 102206, Peoples R China
[4] Huaibei Normal Univ, Anhui Prov Ind Gener Technol Res Ctr Alum Mat, Huaibei 235000, Anhui, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 235卷
基金：
中国国家自然科学基金;
关键词：
Intergranular corrosion; Exfoliation corrosion; Metal matrix composites; In-situ observation; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; EXFOLIATION CORROSION; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; HEAT-TREATMENT; AL; MICROSTRUCTURE; STRENGTH; CRACKING; PRECIPITATION;
D O I：
10.1016/j.corsci.2024.112201
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The different effects of TiB2 on intergranular corrosion (IGC) and exfoliation corrosion (EXCO) in TiB2/7075 composites were investigated. Lower particle content accelerated IGC due to the first dissolution of large TiB2/Al interface precipitates, causing TiB2 deposition in corrosion channels. Conversely, higher particle content reduced the maximum IGC depth to 47 % with dense corrosion products inhibiting penetration of corrosive solution. EXCO weight loss increased by 271 % and 388 % with 3.5 wt% and 7 wt% particles, respectively. Micro-galvanic corrosion and recrystallization caused by particles reduced EXCO resistance. The passive IGC environment and active EXCO environment lead to different corrosion resistances of composites.
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页数：18
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