The influence of Ca2+ on the growth mechanism of corrosion product film on N80 steel in CO2 corrosion environments

被引：12
作者：
Ren, Xiedong [1 ]
Lu, Yuan [2 ]
Wei, Qiang [2 ]
Yu, Liusi [3 ]
Zhai, Kaiyuan [1 ]
Tang, Jiayi [1 ]
Wang, Hu [1 ,3 ]
Xie, Juan [1 ]
机构：
[1] Southwest Petr Univ, Sch New Energy & Mat, Chengdu 610500, Peoples R China
[2] CenerTech Oilfield Chem Co Ltd, CNOOC, Tianjin 300450, Peoples R China
[3] Mat Corros & Protect Key Lab Sichuan Prov, Zigong, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 218卷
关键词：
CO2; corrosion; Iron carbonate; Calcium carbonate; EIS; SEM; CARBON-STEEL; INTERNAL CORROSION; PITTING CORROSION; GAS-PRODUCTION; OIL; PIPELINES; CALCIUM; TEMPERATURE; TRANSPORT; BEHAVIOR;
D O I：
10.1016/j.corsci.2023.111168
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Ca2+ on the growth mechanism of CO2 corrosion products was investigated by weight loss, in situ electrochemical measurements and analysis of corrosion products. With the increase of Ca2+ concentration in solution, the crystallinity of product film, FexCa(1-x)CO(3), weakened and gradually turned to amorphous structure, which provided less protectiveness and elevated the corrosion rate. The high concentration of Ca2+ resulted in the "unstable" growth of FexCa1-_xCO3. At 10000 mg L-1 Ca2+, complicated FexCa1_xCO(3) structures with different Ca content formed. The linear relation between Ca2+ concentration in solution and molar fraction of Ca in the film was also proposed.
引用
收藏
页数：16
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