期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 8, 期 6, 页码 911-915出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.03.024
关键词
atmospheric corrosion; zinc; galvanised steel; electrochemical impedance spectroscopy; thin electrolyte layer; microelectrodes
The local corrosion rate of galvanised steel under a thin electrolyte layer comprising chloride and sulphate ions has been investigated. Localised measurements were achieved through the controlled deposition of an electrolytic droplet onto the surface of the sample, into which reference and counter electrodes were inserted to form an electrochemical microcell. The maximal height of the deposited droplet varied between 400 mu m and 1100 mu m, with a total diameter between 1.34 and 3.35 mm, respectively. Electrochemical polarization curves as well as electrochemical impedance spectroscopy data were recorded on the galvanised steel sample exposed to the electrolytic droplet to determine the local corrosion rate. Corrosion rates were greatly accelerated under electrolyte layers of thicknesses smaller than 800 put. This increase in corrosion rate is a result of the decrease of the diffusion layer thickness leading to an enhanced rate of oxygen reduction. The corrosion rate of galvanised steel did not alter significantly for electrolytic droplets higher than 800 mu m. (C) 2006 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据