Open AccessEvaluation of mineral oils as matrices for AISI/SAE–1020 steel naphthenic corrosion study
Author(s) -
G R Conde-Rodríguez,
J A Sanabria-Cala,
R A Mancilla Estupiñán,
Dionisio Antonio Laverde Cataño,
Manuela Castañeda
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2118/1/012013
Subject(s) - naphthenic acid , naphtha , corrosion , petrochemical , metallurgy , gravimetric analysis , materials science , distillation , mineral oil , synthetic oil , tall oil , crude oil , pulp and paper industry , scanning electron microscope , base oil , chemistry , composite material , chromatography , petroleum engineering , organic chemistry , geology , catalysis , engineering
Petrochemical industry has suffered great economic impact due to light crude oil reserves reduction, so refineries have been processing high acidity heavy crude oils. Studies of corrosion caused by naphthenic acids are interfered by presence of other corrosive agents contained in real crude oils, so naphthenic phenomenon must be isolated using synthetic crude oils. For this reason, in present work two high purity mineral oils were used to evaluate their efficiency as synthetic crude oil matrices in AISI/SAE–1020 steel naphthenic corrosion study. Temperature levels evaluated were 200 °C, 250 °C, and 300 °C, while exposure times evaluated were 5, 10 and 15 hours. Surface morphological characterization of AISI/SAE–1020 steel was carried out using scanning electron microscopy and X–ray diffraction. Gravimetric tests showed that AISI/SAE–1020 steel naphthenic corrosion rate increases with temperature and exposure time for one of the synthetic crude oils. However, results obtained for the other synthetic crude oil did not show increasing behaviour due to presence of sulfur traces in the oil, which caused an interference with AISI/SAE–1020 steel naphthenic corrosion study, reducing the reliability of gravimetric results so they cannot be extrapolated to operating conditions in distillation units.