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Understanding the influences of pre-corrosion on the erosion-corrosion performance of pipeline steel
Wear ( IF 5 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.wear.2019.203151
Yunze Xu , Liang Liu , Qipiao Zhou , Xiaona Wang , Yi Huang

Abstract The initiation and the dynamic progression of erosion-corrosion on a pre-corroded X65 pipeline steel surface was investigated using coupon electrodes and wire beam electrode (WBE). Results show that a concentrated erosion-corrosion region would appear on the steel surface after pre-corrosion which is significantly different from the scatter distributed impingement craters on a fine polished steel coupon. The initiation of localized erosion-corrosion on a pre-corroded steel surface is most probably induced by the instant interfacial chemical and electrochemical heterogeneity, and the instantaneous inhomogeneous sand impingements rather than the surface roughness increasing and the porous rust layer. The pre-corroded area having an initial intense sand impingements would propagate to a concentrated low-lying erosion-corrosion area and small cathodic regions would propagate to isolated islands in the low-lying area.

中文翻译:

了解预腐蚀对管线钢冲蚀腐蚀性能的影响

摘要 使用试样电极和线束电极(WBE)研究了预腐蚀 X65 管线钢表面冲蚀腐蚀的发生和动态进展。结果表明,预腐蚀后的钢材表面会出现集中的冲蚀腐蚀区域,这与精细抛光钢试样上分散分布的撞击坑有显着差异。预腐蚀钢材表面发生局部冲蚀腐蚀最有可能是由瞬时界面化学和电化学异质性以及瞬时不均匀的砂粒撞击引起的,而不是由表面粗糙度增加和多孔锈层引起的。
更新日期:2020-02-01
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