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- Title
H<sub>2</sub>S corrosion inhibition of an ultra high strength pipeline by carboxyethyl-imidazoline.
- Authors
Diaz, E. F.; Gonzalez-Rodriguez, J. G.; Martinez-Villafañe, A.; Gaona-Tiburcio, C.
- Abstract
The H2S corrosion inhibition of ultra high strength steel with carboxyethyl-imidazoline has been evaluated with electrochemical techniques. Tested material included a water quenched Fe–C–Mn steel micro alloyed with Si, Nb, Cr, and Ti, equivalent to an API X-120 pipeline steel, whereas electrochemical techniques included polarization curves, linear polarization resistance, electrochemical impedance spectroscopy, and electrochemical noise measurements. Tested solutions included H2S-containing 3% NaCl with and without 10 vol% of diesel and different inhibitor concentrations (0, 5, 10, 25, 50, and 100 ppm) at 50 °C. Different techniques have shown that the optimum carboxyethyl-imidazoline efficiency was obtained with 50 ppm, but the efficiency decreases as time elapsed. Corrosion rates obtained with diesel were lower than those obtained without diesel.
- Subjects
IMIDAZOLINES; IMPEDANCE spectroscopy; STEEL quenching; TOOL-steel; HIGH strength steel
- Publication
Journal of Applied Electrochemistry, 2010, Vol 40, Issue 9, p1633
- ISSN
0021-891X
- Publication type
Article
- DOI
10.1007/s10800-010-0149-z