The changing topography of corroding mild steel surfaces in seawater
The changing topography of corroding mild steel surfaces in seawater
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DOI：
10.1016/j.corsci.2006.11.003
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发表时间：
2007-05-01
影响因子：
8.3
通讯作者：
Melchers, Robert E.
中科院分区：
文献类型：
--
作者：
Jeffrey, Robert;Melchers, Robert E.
暴露于海洋浸没条件下的低碳钢的腐蚀通常是不均匀的，尽管它通常被理想化。第一次曝光后，阳极区和微坑发展非常迅速，最终形成浅宽坑。这种表面形貌的转变和所涉及的过程仍然没有完全理解。本文介绍了一些典型的图像的亚热带沿海海水中腐蚀的低碳钢的表面拓扑结构的顺序演变。该顺序包括阳极区域的发展，小坑和浅宽坑的发展，小坑明显合并成较大的局部腐蚀，最终出现阶梯状或台阶状，可能是不规则形状的宽坑或宏观坑。该序列是已观察到多次的典型序列，这表明推断描述腐蚀软钢在海水中的表面变化的一般序列是合理的。这将有助于更好地了解低碳钢在海水中的腐蚀过程的演变，并有助于确定各种控制过程。(C)2006爱思唯尔有限公司保留所有权利。
The corrosion of mild steel exposed to marine immersion conditions typically is not uniform although it is often idealized as such. Anodic regions and micro-pits develop very quickly after first exposure and eventually there is the development of shallow broad pits. This transition of the surface topography and the processes involved are still not completely understood. The present paper presents a number of images typical of the sequential evolution of the surface topology of mild steel corroding in sub-tropical coastal seawater. The sequence consists of the development of anodic areas, development of small pits and shallow broad pits, the apparent coalescence of small pits into larger localized corrosion and eventually the appearance of stepped or benched, perhaps irregular-shaped broad or macro-pits. This sequence is typical of that which has been observed many times and this suggests it is reasonable to infer a generic sequence that describes the changing surface of corroding mild steel in seawater. It will assist in developing a better understanding of the evolution of corrosion processes for mild steel in seawater and assist in identifying the various controlling processes. (C) 2006 Elsevier Ltd. All rights reserved.