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

页数：16

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