Passivity Breakdown of Titanium in LiBr Solutions

被引:39
作者
Fernandez-Domene, R. M. [1 ]
Blasco-Tamarit, E. [1 ]
Garcia-Garcia, D. M. [1 ]
Garcia Anton, J. [1 ]
机构
[1] Univ Politecn Valencia, ETSI Ind, Dept Ingn Quim & Nucl, IEC, Valencia 46022, Spain
关键词
ANODIC OXIDE-FILMS; POINT-DEFECT MODEL; PITTING CORROSION; IMPEDANCE SPECTROSCOPY; STAINLESS-STEELS; BROMIDE; METALS; TEMPERATURE; BEHAVIOR; WATER;
D O I
10.1149/2.035401jes
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The passive behavior of titanium and its susceptibility to undergo localized attack in different LiBr solutions at 25 degrees C have been investigated using different electrochemical techniques: potentiodynamic polarization curves, potentiostatic passivation tests, EIS measurements and Mott-Schottky analysis. In low and moderately concentrated LiBr solutions, the breakdown potential E-b decreased with increasing bromide concentrations, while in highly concentrated LiBr solutions, E-b increased with increasing LiBr concentration. In the most concentrated LiBr solution (11.42M) Ti did not undergo passivity breakdown even at 9 V-Ag/AgCl. This observation can be explained by a a decrease in the activity of water in highly concentrated LiBr solutions. (C) 2013 The Electrochemical Society.
引用
收藏
页码:C25 / C35
页数:11
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