Effect of OH, NH2 and OCH3 groups on the corrosion inhibition efficacy of three new 2,4,5-trisubstituted imidazole derivatives on mild steel in acidic solutions: Experimental, surface and DFT explorations

2021 ◽  
Vol 329 ◽  
pp. 115587
Author(s):  
M.K. Prashanth ◽  
C.B. Pradeep Kumar ◽  
B.S. Prathibha ◽  
M.S. Raghu ◽  
K. Yogesh Kumar ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Acidic Solutions ◽  
Imidazole Derivatives ◽  
Experimental Surface

Inhibition of Steel Corrosion in Sulfuric Acid Solution by 1,10-Phenanthroline, para-Aminobenzoate and their Corresponding Manganese Complex

2019 ◽  
Vol 233 (11) ◽  
pp. 1553-1569 ◽  
Author(s):  
Rola N. Tabesh ◽  
Ashraf Moustafa Abdel-Gaber ◽  
Hassan H. Hammud ◽  
Rami Al-Oweini
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Electrochemical Impedance ◽  
Activation Parameters ◽  
Steel Corrosion ◽  
Inhibition Mechanism ◽  
Acidic Solutions ◽  
Mild Steel Corrosion ◽  
Uv Visible ◽  
Adsorptive Properties

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.

scholarly journals A Comparative Study of Inhibitive Effects of Some Schiff Bases on Mild Steel in Acidic Media by Mass Loss Techniques

2010 ◽  
Vol 7 (4) ◽  
pp. 1230-1237
Author(s):  
Abha Goyal ◽  
V. K. Swami ◽  
S. P. Mathur
Keyword(s):  
Comparative Study ◽  
Mild Steel ◽  
Mass Loss ◽  
Corrosion Inhibition ◽  
Schiff Bases ◽  
Maximum Efficiency ◽  
Acidic Media ◽  
Acidic Solutions

Mass loss techniques have been employed to study the corrosion inhibition of some newly synthesized Schiff bases.viz.N-4-(Diethyl amino) salicylidine-2-amino-5-chloropyridine (SB1),N-(4-ethylbenzalidine)-2-amino-5-chloropyridine (SB2),N-(4-ethylbenzalidine)-2-amino-5-bromopyridine (SB3),N-4-(Diethyl amino) salicylidine-2-amino-5-bromopyridine (SB4) for mild steel in HCl and H2SO4solutions. Results of inhibition efficiencies from the mass loss technique show that Schiff bases are good inhibitors in both the acidic solutions. Inhibition efficiencies increase with the increase in the concentration of acids as well as those of inhibitors. Maximum efficiency for H2SO4was found 99.78% and for HCl it was 97.92%.

Influence of nitrones on corrosion inhibition and hydrogen permeation through mild steel in acidic solutions

1999 ◽  
Vol 46 (1) ◽  
pp. 35-39 ◽  
Author(s):  
R. Hariharaputhran ◽  
A. Subramanian ◽  
Alice Arul Antony ◽  
P. Manisankar ◽  
T. Vasudevan ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Hydrogen Permeation ◽  
Acidic Solutions
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