Journal
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
Volume 33, Issue 11, Pages 1226-1247Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01694243.2019.1585029
Keywords
API X60 steel; RCE; EIS; CO2 corrosion; pyrimidine
Funding
- Center of Research Excellence in Corrosion (CoRE-C), at the Research Institute of King Fahd University of Petroleum and Minerals, Saudi Arabia
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A newly synthesized pyrimidine-based compound, 5-(4-hydroxy-3-methoxyphenyl)-2,7-dithioxo-2,3,5,6,7,8-hexahydropyrimido[4,5-d]pyrimidin-4(1H)-one (PP), was evaluated as a promising inhibitor for the CO2 corrosion of API X60 steel in NACE 1D196 brine solution. Under rotation speed of 1000 rpm, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) were complemented with scanning electron microscopy (SEM), X-ray diffraction (XRD) and Attenuated total reflectance infrared (ATR-IR) techniques to assess the corrosion inhibition performance. PP provided inhibition efficiency up to 90% at 20 ppm. It adsorbs on the Fe (110) phase on the steel using its heteroatoms and aromatic rings. Its adsorption greatly reduces the steel surface pitting corrosion.
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