Applications of scanning electrochemical microscopy (SECM) for local characterization of AZ31 surface during corrosion in a buffered media

被引：69
作者：
Jamali, Sina S. [1 ]
Moulton, Simon E. [1 ]
Tallman, Dennis E. [2 ]
Forsyth, Maria [3 ]
Weber, Jan [4 ]
Wallace, Gordon G. [1 ]
机构：
[1] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Intelligent Polymer Res Inst, AIIM Facil, Wollongong, NSW 2522, Australia
[2] N Dakota State Univ, Dept Coatings & Polymer Mat, Fargo, ND 58108 USA
[3] Deakin Univ, Inst Frontier Mat, ARC Ctr Excellence Electromat Sci, Burwood, Vic 3125, Australia
[4] Boston Sci, NL-6229 GS Maastricht, Netherlands
来源：
CORROSION SCIENCE | 2014年 / 86卷
基金：
澳大利亚研究理事会;
关键词：
Magnesium; Electrochemical calculation; Passive films; Hydrogen absorption; Interfaces; MAGNESIUM ALLOY; AC-SECM; IMPEDANCE SPECTROSCOPY; KELVIN PROBE; IN-VIVO; BEHAVIOR; VISUALIZATION; MG; CHLORIDE; PERFORMANCE;
D O I：
10.1016/j.corsci.2014.04.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Different modes of scanning electrochemical mapping (SECM) such as surface generation/tip collection (SG/TC), amperometry, AC-SECM and potentiometry were employed to characterize the active/passive domains, hydrogen gas (H-2) evolution and local pH on a corroding surface of AZ31 in simulated biological fluid (SBF). It was found that the main domains of H-2 evolution are associated with lower insulating properties of the surface as well as higher local pH. The near surface pH was found to be highly alkaline indicating that, even in a buffered solution such as SBF, the local pH on a corroding AZ31 surface can be significantly different to the bulk pH. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：93 / 100
页数：8
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