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Investigation of the evolution of an iron carbonate layer and its effect on localized corrosion of X65 carbon steel in CO2 corrosion environments
Corrosion Science ( IF 8.3 ) Pub Date : 2021-09-15 , DOI: 10.1016/j.corsci.2021.109849
Anastasija Lazareva 1 , Joshua Owen 1 , Silvia Vargas 2 , Richard Barker 1 , Anne Neville 1
Affiliation  

The general and localized corrosion of X65 carbon steel in CO2-saturated environments conducive to iron carbonate (FeCO3) formation has been studied using electrochemical measurements, together with post-test surface analysis. This research offers new insights into the evolution of FeCO3 layer and its link to the subsequent initiation and propagation of localized corrosion. We identify crevice-like regions forming at boundaries/edges of the FeCO3 crystals, which constitute the crystalline layer, where small cavities filled with electrolyte are restricted between developing crystals. It is apparent that such crevice-like features act as precursors to the localized/pitting corrosion on carbon steel over longer durations.

Data availability

The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.



中文翻译:

CO2腐蚀环境中碳酸铁层演化及其对X65碳钢局部腐蚀影响的研究

已经使用电化学测量以及测试后表面分析研究了 X65 碳钢在有助于形成碳酸铁 (FeCO 3 ) 的CO 2饱和环境中的全面和局部腐蚀。这项研究为 FeCO 3层的演变及其与随后局部腐蚀的发生和传播的联系提供了新的见解。我们确定了在构成结晶层的 FeCO 3晶体的边界/边缘处形成的裂缝状区域,其中充满电解质的小腔被限制在发育的晶体之间。很明显,这种类似缝隙的特征是碳钢在较长时间内发生局部/点蚀的先兆。

数据可用性

目前无法共享重现这些发现所需的原始/处理数据,因为这些数据也是正在进行的研究的一部分。

更新日期:2021-09-30
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