In situ SR-XRD analysis of corrosion product formation during 'pseudo-passivation' of carbon steel in CO2-containing aqueous environments
In situ SR-XRD analysis of corrosion product formation during 'pseudo-passivation' of carbon steel in CO2-containing aqueous environments
复制标题
含 CO2 水环境中碳钢“伪钝化”过程中腐蚀产物形成的原位 SR-XRD 分析
DOI：
10.1016/j.corsci.2023.111598
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发表时间：
2023
影响因子：
8.3
通讯作者：
Owen J
中科院分区：
文献类型：
--
作者：
Owen J
采用同步辐射X射线衍射（SR-XRD）原位跟踪X65碳钢在含CO2水溶液环境（80 °C，pH 6.3-7.3）中腐蚀产物的演变。一个定制设计的流动电池是用来跟踪在自然和电位驱动的“伪钝化”阶段的电化学行为和腐蚀产物生长的实时伴随变化。我们发现，没有检测到的结晶磁铁矿（Fe 3 O 4）相的形式在“伪钝化”在所有条件下研究。此外，结果表明，在这些实验中的“伪钝化”过程中观察到的显着ennoblement可以强烈相关的碳酸铁（FeCO 3）在钢表面上的积累。
In situSynchrotron Radiation X-ray Diffraction (SR-XRD) is employed to follow the evolution of corrosion products on X65 carbon steel in a CO2-containing aqueous environment (80 °C, pH 6.3–7.3). A custom-designed flow cell is used to follow the real-time concomitant changes in electrochemical behaviour and corrosion product growth during stages of both natural and potentiodynamically driven ‘pseudo-passivation’. We show that no detectable crystalline magnetite (Fe3O4) phase forms during ‘pseudo-passivation’ across all conditions studied. Furthermore, the results suggest the significant ennoblement observed during ‘pseudo-passivation’ in these experiments can be strongly related to the accumulation of iron carbonate (FeCO3) on the steel surface.