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

被引：68

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

页码：93 / 100

页数：8

共 27 条

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