scholarly journals Electrochemical Impedance Spectroscopy Investigations of Steel Corrosion in Acid media in the presence of Thiophene Derivatives

Author(s):  
S Ben Aoun ◽  



2017 ◽  
Vol 64 (1) ◽  
pp. 23-35 ◽  
Author(s):  
Mohammed Elalaoui Belghiti ◽  
Ayssar Nahlé ◽  
Abdeslam Ansari ◽  
Yasser Karzazi ◽  
S. Tighadouini ◽  
...  

Purpose This paper aims to study the inhibition effect of 2-pyridinealdazine on the corrosion of mild steel in an acidic medium. The inhibition effect was studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization measurements. Design/methodology/approach Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, X-ray diffraction and spectral and conformational isomers analysis of A (E-PAA) and B (Z-PAA) were performed were investigated. Findings 2-pyridinealdazine (PAA) acts as a good inhibitor for the corrosion of steel in 2.0 M H3PO4. The inhibition efficiency increases with an increase in inhibitor concentration but decreases with an increase in temperature. Originality/value This paper is intended to be added to the family of azines which are highly efficient inhibitors and can be used in the area of corrosion prevention and control.



2004 ◽  
Vol 55 (9) ◽  
pp. 676-683 ◽  
Author(s):  
M. J. Hernández-Gayosso ◽  
G. Zavala-Olivares ◽  
N. Ruiz-Ordaz ◽  
R. García-Esquivel ◽  
J. L. Mora-Mendoza


Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3183
Author(s):  
Saleh S. Alarfaji ◽  
Ismat H. Ali ◽  
Mutasem Z. Bani-Fwaz ◽  
Mahmoud A. Bedair

Despite the extensive use of carbon steel in all industrial sectors, particularly in the petroleum industry, its low corrosion resistance is an ongoing problem for these industries. In the current work, two malonyl dihydrazide derivatives, namely 2,2’-malonylbis (N-phenylhydrazine-1-carbothiamide (MBC) and N’1, N’3-bis(-2-hydroxybenzylidene) malonohydrazide (HBM), were examined as inhibitors for the carbon steel corrosion in 1.0 M HCl. Both MBC and HBM were characterised using thin-layer chromatography, elemental analysis, infrared spectroscopy, and nuclear magnetic resonance techniques. The corrosion tests were performed using mass loss measurements, polarisation curves, and electrochemical impedance spectroscopy. It is obtained from the mass loss studies that the optimal concentration for both inhibitors is 2.0 × 10−5 mol/L, and the inhibition efficiencies reached up to 90.7% and 84.5% for MBC and HBM, respectively. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (PDP) indicate an increased impedance in the presence of both MBC and HBM and mixed-type inhibitors, respectively. Both inhibitors can mitigate corrosion in the range of 298–328 K. Values of free energy changes obtained from the Langmuir model suggest that the inhibitors suppress the corrosion process principally by chemisorption. The computational investigations were conducted to identify the factors connected with the anti-corrosive properties of the examined inhibitors.



2019 ◽  
Vol 19 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Jaeyeon Kim ◽  
Kitae Yoo ◽  
Zeli Wang ◽  
Mina Lim ◽  
Soyeon Cho ◽  
...  


2013 ◽  
Vol 4 (4) ◽  
pp. 157-162 ◽  
Author(s):  
Tetsuya Osaka ◽  
Hiroki Nara ◽  
Daikichi Mukoyama ◽  
Tokihiko Yokoshima


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