Does "coating resistance" control corrosion?

被引：18
|
作者：
Sykes, J. M. [1 ]
Whyte, E. P. [1 ]
Yu, X. [1 ]
Sahir, Z. Sharer [1 ,2 ]
机构：
[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England
[2] Univ Teknol Malaysia, Inst Oil & Gas, UTM MPRC, Skudai 81310, Johor, Malaysia
来源：
PROGRESS IN ORGANIC COATINGS | 2017年 / 102卷
基金：
英国工程与自然科学研究理事会;
关键词：
Resistance inhibition; Electrochemical impedance spectroscopy; Coating resistance; Paint coatings; Electrode polarisation; COATED STEEL; PROTECTION; MECHANISM; BEHAVIOR; IRON;
D O I：
10.1016/j.porgcoat.2016.04.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Bacon, Smith and Rugg first identified a link between the DC resistance of a coated panel after exposure to salt solution and the performance of the coating in an exposure test. Mayne explained this as "resistance inhibition". This paper will consider what coating resistance measured by Electrochemical Impedance Spectroscopy (EIS) tells us about factors controlling the corrosion process. It shows that the activation energy for ion conduction does not correspond with that for the corrosion process, suggesting that the paint resistance we measure is not the controlling factor. Furthermore, tests on a model galvanic cell reveal a significant influence of both electrode polarisation and resistance inhibition. (C) 2016 Published by Elsevier B.V.
引用
收藏
页码：82 / 87
页数：6
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