Study on corrosion behavior of P110S steel in CO2-H2S-saturated solution

The corrosion behavior of P110S steel in CO2-H2S-saturated completion fluid with pH buffer was studied using immersion tests and electrochemical tests. SEM, EDS, XRD, and potential-pH diagrams were used to analyze the corrosion scale characteristics. P110S steel experienced severe localized corrosio...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 17; no. 1; p. 22018
Main Authors Yang, Lantian, Zhang, Jiangjiang, Li, Fang, Zeng, Wenguang, Wang, Bei, Guo, Yujie, Wu, Jiarong, Chen, Yingfeng, Wang, Maomao, Lu, Minxu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2022
Subjects
CO2-H2S corrosion
Corrosion scale
Electrochemical
P110S
pH buffer
pH buffer
CO2-H2S corrosion
Corrosion scale
P110S
Electrochemical
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Summary:The corrosion behavior of P110S steel in CO2-H2S-saturated completion fluid with pH buffer was studied using immersion tests and electrochemical tests. SEM, EDS, XRD, and potential-pH diagrams were used to analyze the corrosion scale characteristics. P110S steel experienced severe localized corrosion in CO2-H2S-saturated completion fluid despite the addition of pH buffer. The main component of the corrosion scale was mackinawite and FeCO3. The corrosion scale with mackinawite as the main component had an excellent protective effect on the matrix when the scale was intact. However, the corrosion scale was poorly bonded to the matrix and was prone to partial cracking and peeling, which was the cause of severe localized corrosion of P110S steel.
ISSN:1452-3981
1452-3981
DOI:10.20964/2022.01.19