Corrosion of X100 pipeline steel under plastic strain in a neutral pH bicarbonate solution
Corrosion of X100 pipeline steel under plastic strain in a neutral pH bicarbonate solution
复制标题
DOI：
10.1016/j.corsci.2012.07.012
复制
发表时间：
2012-11
影响因子：
8.3
通讯作者：
L. Y. Xu;Y. F. Cheng
中科院分区：
文献类型：
--
作者：
L. Y. Xu;Y. F. Cheng
在这项工作中，通过机械测试、电化学和微电化学测量以及有限元分析研究了塑性应变对 X100 管线钢腐蚀的影响。虽然施加的应变会增强钢的腐蚀，但弹性变形的影响是有限的。钢上产生的机械电化学效应在弹性区域很小，而在塑性应变下变得显着。虽然预应变都会增强阳极和阴极反应，但对阳极反应的影响更为显着。此外，在现实中，管道上塑性应力和应变的不均匀分布会导致钢材上截然不同的腐蚀活动。这可能是引发优先局部腐蚀甚至裂纹的原因。
In this work, the effect of plastic strain on corrosion of an X100 pipeline steel was investigated by mechanical testing, electrochemical and micro-electrochemical measurements, and finite element analysis. While the steel corrosion is enhanced by applied strain, the effect of elastic deformation is limited. The mechanoelectrochemical effect developed on the steel is small in elastic region, and it becomes significant under plastic strain. While both anodic and cathodic reactions are enhanced by pre-strain, the effect on anodic reaction is more significant. Furthermore, in reality, a non-uniform distribution of plastic stress and strain on pipelines would cause quite different corrosion activities on the steel. This could be the reason to initiate preferential localized corrosion and even cracks.