TY - JOUR
T1 - Novel organoselenides as efficient corrosion inhibitors for N80 steel in a 3.5 wt% sodium chloride solution
AU - Shaaban, Saad
AU - Shalabi, Kamal
AU - Yousef, Tarek A.
AU - Alsulaim, Ghayah M.
AU - Alaasar, Mohamed
AU - Abu-Dief, Ahmed M.
AU - Al-Janabi, Ahmed S.M.
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2025/2
Y1 - 2025/2
N2 - New organoselenium-containing Schiff base (MSeOH) and its Ni (II) chelate [Ni(MSeO)2(H2O)2] were synthesized and characterized. Their corrosion inhibition was investigated toward N80 steel in a 3.5 % NaCl solution. Their corrosion inhibition mechanism was investigated for the N80 steel in 3.5 % NaCl solution using different techniques, including electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), potentiodynamic polarization (PDP), density functional theory (DFT), and Monte Carlo (MC) simulations. The electrochemical studies demonstrated high protection efficiencies (up to 96.9 %) of 8.0 × 10−5 M concentration. The [Ni(MSeO)2(H2O)2] exhibited superior corrosion inhibition efficiency compared to the ligand MSeOH. The additives on the corrosion solution manifested a significant influence, particularly on the anodic (βa) and cathodic (βc) Tafel slopes, proposing a mixed-type inhibition, reducing the anodic and cathodic reactions. The spontaneous adsorption of MSeOH and [Ni(MSeO)2(H2O)2] on the steel's surface, conforming to the Langmuir adsorption isotherm, was substantiated by the increase in charge transfer resistance (Rct) and the decrease in the constant phase element (Y0) admittance values, evidencing the adsorption of MSeOH and [Ni(MSeO)2(H2O)2] molecules on the N80 steel surface, which was further corroborated by XPS and |SEM analysis. Moreover, DFT results showed that the [Ni(MSeO)2(H2O)2] complex has a high HOMO energy level, thus indicating high inhibition efficiency. On the other hand, a low LUMO energy level suggested the ease of electron acceptance by the vacant d-orbitals of the Ni(II) metal, promoting the formation of covalent bonds between the organic molecule and the metal center. Moreover, MC simulations substantiated the appropriate alignment of the inhibitor molecules in a flat orientation on the steel surface, thereby enhancing optimal surface coverage.
AB - New organoselenium-containing Schiff base (MSeOH) and its Ni (II) chelate [Ni(MSeO)2(H2O)2] were synthesized and characterized. Their corrosion inhibition was investigated toward N80 steel in a 3.5 % NaCl solution. Their corrosion inhibition mechanism was investigated for the N80 steel in 3.5 % NaCl solution using different techniques, including electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), potentiodynamic polarization (PDP), density functional theory (DFT), and Monte Carlo (MC) simulations. The electrochemical studies demonstrated high protection efficiencies (up to 96.9 %) of 8.0 × 10−5 M concentration. The [Ni(MSeO)2(H2O)2] exhibited superior corrosion inhibition efficiency compared to the ligand MSeOH. The additives on the corrosion solution manifested a significant influence, particularly on the anodic (βa) and cathodic (βc) Tafel slopes, proposing a mixed-type inhibition, reducing the anodic and cathodic reactions. The spontaneous adsorption of MSeOH and [Ni(MSeO)2(H2O)2] on the steel's surface, conforming to the Langmuir adsorption isotherm, was substantiated by the increase in charge transfer resistance (Rct) and the decrease in the constant phase element (Y0) admittance values, evidencing the adsorption of MSeOH and [Ni(MSeO)2(H2O)2] molecules on the N80 steel surface, which was further corroborated by XPS and |SEM analysis. Moreover, DFT results showed that the [Ni(MSeO)2(H2O)2] complex has a high HOMO energy level, thus indicating high inhibition efficiency. On the other hand, a low LUMO energy level suggested the ease of electron acceptance by the vacant d-orbitals of the Ni(II) metal, promoting the formation of covalent bonds between the organic molecule and the metal center. Moreover, MC simulations substantiated the appropriate alignment of the inhibitor molecules in a flat orientation on the steel surface, thereby enhancing optimal surface coverage.
KW - Corrosion inhibition
KW - DFT calculations
KW - N80 steel
KW - Organoselenides
KW - XPS
UR - http://www.scopus.com/inward/record.url?scp=85211071999&partnerID=8YFLogxK
U2 - 10.1016/j.inoche.2024.113632
DO - 10.1016/j.inoche.2024.113632
M3 - Article
AN - SCOPUS:85211071999
SN - 1387-7003
VL - 172
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
M1 - 113632
ER -