Effect of Microstructure of X-120 Steel on CO2 Corrosion Inhibition by 2-Mercaptobenzimidazole
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The use of 2-mercaptobenzimidazole (2MBI) as corrosion inhibitor for API X-120 pipeline with two different microstructures in a CO2-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.
KeywordsCO2 corrosion high-strength steel inhibitor
- 10.H. Tian and Y.F. Cheng, Novel Inhibitors Containing Multi-Functional Groups for Pipeline Corrosion Inhibition in Oilfield Formation Water, Corrosion, 2016, 72, p 472–485Google Scholar
- 18.F. El-Hajjaji, M.E. Belghiti, B. Hammouti, S. Jodeh, O. Hamed, H. Lgaz, and R. Salghi, Adsorption and Corrosion Inhibition Effect of 2-Mercaptobenzimidazole (Surfactant) on a Carbon Steel Surface in an Acidic Medium: Experimental and Monte Carlo Simulations, Port. Electrochimica Acta, 2018, 36, p 197–212CrossRefGoogle Scholar
- 30.C.A. Schneider, W.S. Rasband, and K.W. Eliceiri, NIH Image to ImageJ: 25 years of Image Analysis, Nat. Methods, 2012, 9, p 671–675Google Scholar
- 33.A. Kahyarian, B. Brown, S. Nesic, Electrochemistry of CO2 Corrosion of Mild Steel: Effect of CO2 on Cathodic Currents, Corrosion (in press). https://doi.org/10.5006/2792.