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Influence of seawater depth and electrode potential on the tribocorrosion of Ti6Al4V alloy under the simulated deep-sea environment by in-situ electrochemical technique
Corrosion Science ( IF 8.3 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.corsci.2020.109185
Pengwei Ren , Huimin Meng , Qijun Xia , Zhongzheng Zhu , Mingtao He

Abstract Tribocorrosion of Ti6Al4 V alloy has been investigated in 3.5 wt.% NaCl solution under simulated deep-sea environment. The results demonstrate tribocorrosion rate increases with hydrostatic pressure (i. e. seawater depth) at an accelerated speed of 5.9 × 10-6 mm-3·N-1 m-1 MPa-1. Wear volume under potentiostatic tribocorrosion depends on potential and experiences a maximum at -0.2 VAg/AgCl where the volume at 20 MPa is almost tripled that at 0.1 MPa. Therefore, both hydrostatic pressure and potential have significant effect on tribocorrosion behaviour. At higher hydrostatic pressure, tribocorrosion is dominated by delaminated wear and the increment in wear volume results from mechanical wear and synergism.

中文翻译:

原位电化学技术模拟深海环境下海水深度和电极电位对Ti6Al4V合金摩擦腐蚀的影响

摘要 在模拟深海环境下研究了Ti6Al4V 合金在3.5 wt.% NaCl 溶液中的摩擦腐蚀。结果表明,在 5.9 × 10-6 mm-3·N-1 m-1 MPa-1 的加速速度下,摩擦腐蚀速率随着静水压力(即海水深度)而增加。恒电位摩擦腐蚀下的磨损量取决于电位,并在 -0.2 VAg/AgCl 处达到最大值,其中 20 MPa 时的磨损量几乎是 0.1 MPa 时的三倍。因此,静水压力和电位对摩擦腐蚀行为都有显着影响。在较高的静水压力下,摩擦腐蚀以分层磨损为主,磨损量的增加是机械磨损和协同作用的结果。
更新日期:2021-03-01
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