Petroleum Science >2021,??lssue 1:??- DOI: https://doi.org/10.1007/s12182-020-00532-z
Effect of anodic dissolution and passivation on X80 steel in NaHCO3 solution Open?Access
文章信息
作者：Lai-Shun Yang & Chao Yang
作者单位：
投稿时间：2020-11-1
引用方式：Yang, LS., Yang, C. Effect of anodic dissolution and passivation on X80 steel in NaHCO3 solution. Pet. Sci. (2020). https://doi.org/10.1007/s12182-020-00532-z
文章摘要
The effects of extreme stray current on the anodic dissolution and passivation of X80 steel in NaHCO3 solution were investigated using measurements of polarization curves and EIS, AFM and SEM techniques. Under the interference of anodic current (i?=?0~200 A/m2), main constituents of corrosion products of X80 steel were FeO(OH) and Fe3O4. A double-layer film formed at i?=?100 A/m2, in which FeOOH was in outer and Fe3O4 lied in inner. The formation mechanism of Fe3O4 was confirmed and described by the electrochemical reaction in various regions on anodic potentiodynamic polarization curve.
关键词
-
Anodic current ;Passivation ;X80 steel; Fe3O4 ;Near-neutral solution