Unraveling short-term O 2 contamination on under deposit corrosion of X65 pipeline steel in CO 2 saturated solution

被引：14
作者：
He, Limin [1 ]
Zhang, Qiliang [1 ]
Chen, Wanbin [1 ]
Wang, Yihan [1 ]
Wang, Mingyu [1 ]
Huang, Yi [1 ,2 ]
Xu, Yunze [1 ,2 ,3 ]
机构：
[1] Dalian Univ Technol, Sch Naval Architecture & Ocean Engn, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China
[3] Dalian Univ Technol, Linggong Rd 2, Dalian 116024, Liaoning Provin, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 233卷
关键词：
CO2; corrosion; O2; contamination; Under UDC; WBE; EIS; CARBON-STEEL; NONUNIFORM CORROSION; BEHAVIOR; WATER; O-2; INHIBITION; IMPURITIES; DIOXIDE; OXYGEN; FECO3;
D O I：
10.1016/j.corsci.2024.112113
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The impact of short-term O 2 contamination on the deposit-covered pipeline steel under a CO 2 -saturated solution was investigated using steel coupon and wire beam electrode. Results show that the brief exposure to O 2 destroyed the FeCO 3 film, and converted it into porous iron oxides, weakening its protection property. However, upon CO 2 reinjection, the dense FeCO 3 film regrew soon underneath the damaged FeCO 3 layer on the bare steel, restoring its protective properties. Conversely, the localized corrosion beneath the deposits persisted and worsened, fueled by macro-cell current between the bare steel and the deposit-covered steel.
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页数：19
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