Effect of anodic potential on the electrochemical response of passive layers formed on the surface of coarse- and fine-grained pure nickel in borate buffer solutions

被引：21
|
作者：
Fattah-alhosseini, Arash [1 ]
Naseri, Majid [2 ]
Gashti, Seyed Omid [1 ]
Vafaeian, Saeed [1 ]
Keshavarz, Mohsen K. [3 ]
机构：
[1] Bu Ali Sina Univ, Dept Mat Engn, Hamadan 6517838695, Iran
[2] Shahid Chamran Univ Ahvaz, Fac Engn, Dept Mat Sci & Engn, Ahvaz, Iran
[3] McGill Univ, Dept Min & Met Engn, Montreal, PQ H3A 0C5, Canada
来源：
CORROSION SCIENCE | 2018年 / 131卷
关键词：
Grain refinement; Cold deformation; Passive layer; Electrochemical impedance spectroscopy; Mott-Schottky analysis; SEVERE PLASTIC-DEFORMATION; IMPEDANCE SPECTROSCOPY; MECHANICAL-PROPERTIES; OXIDE-FILMS; CORROSION; BEHAVIOR; TEMPERATURE; ALLOY; OXIDATION; BREAKDOWN;
D O I：
10.1016/j.corsci.2017.11.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work, the role of cold deformation and anodic potential on the electrochemical response of pure nickel in borate buffer solutions were investigated. The application of cold deformation gave rise to a more localized microstructure that contained a greater number of fine grains. In order to investigation of the electrochemical response of specimens, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and Mott-Schottky (M-S) analysis were performed. As a result, with increasing of applied potential, the polarization resistance and passive film thickness decreased. Also, density of electron acceptor at passive layer decreased by increasing of applied potential.
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页码：81 / 93
页数：13
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