Effect of Microstructure of X-120 Steel on CO{sub 2} Corrosion Inhibition by 2-Mercaptobenzimidazole

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-04398-0· OSTI ID:22970358

Larios-Galvez, A. K. ^[1]; Rodriguez-Clemente, E. ^[2]; Serna, S. ^[1]; Illanez, B. Campillo ^[3]; Guardian, R.; Porcayo-Calderon, J.

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1. Universidad Autonoma del Estado de Morelos, CIICAp (Mexico)
2. Universidad Autonoma Metropolitana-Azcapotzalco, Ing. De Materiales (Mexico)
3. Universidad Nacional Autonoma de Mexico, Fac. de Quimica (Mexico)

The use of 2-mercaptobenzimidazole (2MBI) as corrosion inhibitor for API X-120 pipeline with two different microstructures in a CO{sub 2}-saturated 3.5% NaCl solution has been investigated. One microstructure was predominantly martensitic and bainitic (steel A), whereas the second one was mainly ferritic (steel B). It was found that 2MBI behaved as a mixed type of corrosion inhibitor and it changed the corrosion-controlled mechanism. In the uninhibited solution, steel A had a dissolution rate higher than steel B. However, in the presence of inhibitor, dissolution rate for steel A was lower than that for B because the film-formed inhibitor is adsorbed in a better way for steel A which has smaller precipitates distributed in a more homogeneous way than that for steel B.

• OSTI ID: 22970358
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 11 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BENZIMIDAZOLES
CARBON DIOXIDE
CORROSION INHIBITORS
CORROSION PROTECTION
FERRITIC STEELS
MARTENSITIC STEELS
MICROSTRUCTURE
SODIUM CHLORIDES