Synergistic effect of chloride ion and Shewanella algae accelerates the corrosion of Ti-6Al-4V alloy
Synergistic effect of chloride ion and Shewanella algae accelerates the corrosion of Ti-6Al-4V alloy
复制标题
氯离子与希瓦氏藻的协同作用加速Ti-6Al-4V合金的腐蚀
DOI：
10.1016/j.jmst.2020.07.022
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发表时间：
2021-04-30
影响因子：
10.9
通讯作者：
Wang, Fuhui
中科院分区：
文献类型：
--
作者：
Li, Zhong;Wang, Jie;Wang, Fuhui
随着钛合金在海洋环境中应用的日益广泛，研究其微生物影响的腐蚀成为当务之急。研究表明，在不同Cl-浓度的2216 E介质中，海洋细菌希瓦氏藻（Shewanella algae）对Ti-6Al-4V合金的腐蚀有加速作用。各种电化学、点蚀形貌和钝化膜分析表明，S。藻类削弱了钝化膜，使Cl-更具侵略性。这两个因素的协同作用导致钛合金的腐蚀加速，导致在含3.50%（w/w）Cl-的2216 E介质中的最大点蚀深度为3.2 μ m，腐蚀电流密度为26.5 nA cm（-2）。(C)2021由Elsevier Ltd代表Journal of Materials Science & Technology编辑部出版。
increasing utilization of titanium alloys in marine environments makes their microbiologically influenced corrosion study a timely matter. This work demonstrated that the corrosion of Ti-6Al-4 V alloy was accelerated by a marine bacterium Shewanella algae in 2216E medium with different Cl- level. Various electrochemical, pitting morphology and passive film analyses demonstrated that S. algae weakened the passive film, which made Cl- more aggressive. The synergy of those two factors caused considerable corrosion acceleration of the titanium alloy, leading to a maximum pit depth of 3.2 mu m and corrosion current density of 26.5 nA cm(-2) in 2216E medium with 3.50 % (w/w) Cl-. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.