Clarifying the alloying effects of La and Ce on the pitting corrosion behaviour of Al-based metallic glasses

被引：1
作者：
Wang, Qi [1 ,2 ]
Zhang, Suode [1 ]
Cui, Jingping [1 ]
Pan, Shaopeng [3 ]
Emori, Wilfred [4 ]
Wang, Jianqiang [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
[4] Sichuan Univ Sci & Engn, Sch Mat Sci & Engn, Zigong 643000, Sichuan, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 230卷
基金：
中国国家自然科学基金;
关键词：
Amorphous structure; Corrosion behaviour; Electron work function; TEM; Passive film; FORMING ABILITY; SURFACE-CHEMISTRY; PIT INITIATION; PASSIVE FILM; BULK; STABILITY; EVOLUTION; CRYSTALLIZATION; HETEROGENEITIES; RESISTANCE;
D O I：
10.1016/j.corsci.2024.111925
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of La and Ce on the stability of the passive films and dissolution characteristics of Al-based metallic glasses were comparatively investigated. The results showed that the alloy with the addition of La had superior pitting resistance. This is because, firstly, La doping decreased the carrier density and increased the electron work function of the passive film, making it more stable, thereby inhibiting pit initiation. Moreover, molecular dynamics simulations showed that the La-alloyed glassy alloys had lower coordination number of polyhedral clusters, shorter bond lengths, and higher bond strengths, leading to slower dissolution kinetics and suppressed pit growth.
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页数：17
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