TY - JOUR
T1 - Theoretical and experimental study of the anion carboxylate in quaternary-ammonium-derived ionic liquids for inhibiting the corrosion of API X60 steel in 1 M H2SO4
AU - Olivares-Xometl, O.
AU - Lijanova, Irina V.
AU - Likhanova, Natalya V.
AU - Arellanes-Lozada, P.
AU - Hernández-Cocoletzi, H.
AU - Arriola-Morales, Janette
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/15
Y1 - 2020/11/15
N2 - In the present work, the inhibition mechanism of three quaternary-ammonium-derived ionic liquids (ILs) is proposed. Studies were aimed at eliciting the effect exerted by the length of the alkyl chain of the anion carboxylate (HOOC-CnH2n-COO−) in this type of compounds on the corrosion inhibition of API X60 steel in 1 M H2SO4. The inhibition efficiency (η) ranged from 55 to 80% and was obtained by means of the weight loss and electrochemical techniques. The adsorption of the ILs on the steel surface obeyed Langmuir's adsorption isotherm. The thermodynamic data indicated that the adsorption of the evaluated ILs is controlled by the combination of physicochemical processes. Furthermore, the adsorption phenomenon was related to the orientation of the anion functional group HCOO− and cation nitrogen. The X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analyses confirmed the adsorption of the ILs on the steel surface, which slowed down the corrosion rate.
AB - In the present work, the inhibition mechanism of three quaternary-ammonium-derived ionic liquids (ILs) is proposed. Studies were aimed at eliciting the effect exerted by the length of the alkyl chain of the anion carboxylate (HOOC-CnH2n-COO−) in this type of compounds on the corrosion inhibition of API X60 steel in 1 M H2SO4. The inhibition efficiency (η) ranged from 55 to 80% and was obtained by means of the weight loss and electrochemical techniques. The adsorption of the ILs on the steel surface obeyed Langmuir's adsorption isotherm. The thermodynamic data indicated that the adsorption of the evaluated ILs is controlled by the combination of physicochemical processes. Furthermore, the adsorption phenomenon was related to the orientation of the anion functional group HCOO− and cation nitrogen. The X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analyses confirmed the adsorption of the ILs on the steel surface, which slowed down the corrosion rate.
KW - Corrosion inhibitors
KW - Inhibition efficiency
KW - Ionic liquids
KW - Surface analysis
UR - http://www.scopus.com/inward/record.url?scp=85090128616&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2020.114075
DO - 10.1016/j.molliq.2020.114075
M3 - Artículo
AN - SCOPUS:85090128616
SN - 0167-7322
VL - 318
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 114075
ER -