材料科学
介电谱
合金
海水
腐蚀
电化学
湍流
冶金
电阻抗
氧气
分析化学(期刊)
化学工程
电极
热力学
物理化学
色谱法
工程类
有机化学
化学
地质学
物理
电气工程
海洋学
作者
Marcela C. Quevedo,Gonzalo Galicia,Rodrigo Mayén-Mondragón,Juan Genescá Llongueras
标识
DOI:10.1016/j.jmrt.2017.06.004
摘要
Abstract The effect of flow on the corrosion of Al–14 wt% Zn–8 wt% Mg alloy in aerated synthetic seawater at ambient temperature was studied using a rotating cylinder electrode (RCE) under turbulent regime conditions by means of electrochemical impedance spectroscopy (EIS). The overall electrochemical corrosion process was found to be strongly influenced by the oxygen mass transfer process under turbulent flow conditions on the cathodic kinetics, driving to a significant increase in corrosion rate. At corrosion potential, Ecorr value, contributions from the anodic and cathodic processes involved were observed in the impedance diagrams. Instead, at a cathodic potential of −1.2 V (sce), impedance measurements proved the predominance of the mass-transfer process for oxygen. A primary analysis of the impedance plots allowed to confirm such situation.
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