Insights into corrosion inhibition mechanism of mild steel in 1 M HCl solution by quinoxaline derivatives: electrochemical, SEM/EDAX, UV-visible, FT-IR and theoretical approaches

Author(s):  
M. Ouakki ◽  
M. Galai ◽  
Z. Benzekri ◽  
Chandrabhan Verma ◽  
E. Ech-chihbi ◽  
...  
RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77515-77524 ◽  
Author(s):  
Kai Wan ◽  
Panpan Feng ◽  
Baorong Hou ◽  
Yantao Li

CHPCS was synthesized and showed better corrosion inhibition than HPCS (corrosion inhibition of 95.3%); its corrosion inhibition mechanism is presented.


2019 ◽  
Vol 233 (11) ◽  
pp. 1553-1569 ◽  
Author(s):  
Rola N. Tabesh ◽  
Ashraf Moustafa Abdel-Gaber ◽  
Hassan H. Hammud ◽  
Rami Al-Oweini

Abstract The ligands 1,10-phenanthroline, (P) and para-aminobenzoate, (B); as well as their corresponding MnPB complex [bis-(dimanganese di-μ-paraaminobenzoate dichloro diphenanthroline)] have been investigated as inhibitors of mild steel corrosion in H2SO4 (0.5 M) solutions via potentiodynamic and electrochemical impedance spectroscopy techniques. Stability of the prepared complex was examined by UV-visible spectroscopy. The corrosion inhibition, thermodynamics, and adsorptive properties obtained have shown that MnPB complex has remarkable effects in the acidic solutions. Theoretical fitting of different adsorption isotherms such as Langmuir, Flory–Huggins, and the kinetic-thermodynamic models were tested and the thermodynamic activation parameters were calculated. The data revealed that the corrosion inhibition mechanism of mild steel in acidic solutions by the MnPB complex goes via physicochemical adsorption.


2020 ◽  
Author(s):  
Priyanka Singh ◽  
Sampat Singh Chauhan ◽  
S. Swarupa Tripathy ◽  
V. P. Singh ◽  
M. A. Quraishi

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