Spectroscopic Investigations of Physicochemical Interactions on Mild Steel in an Acidic Medium by Environmentally Friendly Green Inhibitors

2012 ◽  
Vol 16 (2) ◽  
pp. 251-263 ◽  
Author(s):  
Pitchai Sakunthala ◽  
Shanmuga Sundaram Vivekananthan ◽  
Mayakrishnan Gopiraman ◽  
Nagarajan Sulochana ◽  
Alex Ramani Vincent
Keyword(s):  
Mild Steel ◽  
Acidic Medium ◽  
Environmentally Friendly ◽  
Green Inhibitors ◽  
Spectroscopic Investigations ◽  
Physicochemical Interactions

scholarly journals Adsorption Isotherm and Activation Energy of Inhibition of Alkaloids on Mild Steel Surface in Acidic Medium

2021 ◽  
Vol 2 (01) ◽  
pp. 59-67
Author(s):  
Hari Bhakta Oli ◽  
Davi Lal Parajuli ◽  
Srijana Sharma ◽  
Amrita Chapagain ◽  
Amar Prasad Yadav
Keyword(s):  
Activation Energy ◽  
Weight Loss ◽  
Adsorption Isotherm ◽  
Mild Steel ◽  
Acidic Medium ◽  
Physical Adsorption ◽  
Green Inhibitors ◽  
Different Temperatures ◽  
Enthalpy And Entropy ◽  
Medium Weight

Alkaloids as green inhibitors were extracted from three different plants Rhynchostylis retusa, Artimesia vulgaris,and Solanum tuberosum. Weight loss measurement in mild steel has been carried out in the presence and absence of green inhibitors individually in an acidic medium. Weight loss measurements at different temperatures are used to calculate thermodynamic parameters. The weight loss measurements at different concentrations are used to find adsorption isotherm and found that it obeys Langmuir adsorption isotherm with R2 values 1, 1, 0.996 for three inhibitors. Activation energy, enthalpy, and entropy of the three inhibitors have been calculated. It is found that the value of all these parameters increased in the addition of inhibitors. The free energy of the system is calculated and found (-17.46 kJ mol-1) indicating that the adsorption process is spontaneous and there is physical adsorption at the MS-Inhibitor interface.

Investigation on Corrosion Inhibition of Mild Steel by Extract of Dracaena arborea Leaves in Acidic Medium

2021 ◽  
Author(s):  
Abolanle S. Adekunle ◽  
Lukman O. Olasunkanmi ◽  
Solomon S. Durodola ◽  
John A. O. Oyekunle ◽  
Temitope O. Olomola
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Acidic Medium

scholarly journals A Study of Mild Steel Corrosion UsingAdhatoda Vasica(AV) Extract as Inhibitor in Different Acid Medium

2010 ◽  
Vol 7 (4) ◽  
pp. 1284-1289 ◽  
Author(s):  
P. Matheswaran ◽  
A. K. Ramasamy
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Acid Medium ◽  
Acidic Medium ◽  
Active Sites ◽  
Mixed Type ◽  
Steel Corrosion ◽  
Adhatoda Vasica ◽  
Mild Steel Corrosion ◽  
Inhibitive Action

Corrosion behavior of mild steel in acidic medium usingAdhatoda Vasica(AV) extract was investigated. The inhibitive effective ofAdhatoda Vasicaon the corrosion of mild steel in different acidic medium has been studied by weight loss and polarization methods. The Ecorrvalues are shifted slightly towards negative side in presence of inhibitors which indicate the inhibitors inhibit the corrosion of mild steel in acids solution by controlling both anodic and cathodic reactions due to the blocking of active sites on the metal surface. It is evident that inhibitors bring about considerable polarization of the cathode as well as anode. It was, therefore, inferred that the inhibitive action is of mixed type.

ELECTROCHEMICAL INVESTIGATION OF 2-THIOHYDANTOIN DERIVATIVES AS CORROSION INHIBITORS FOR MILD STEEL IN ACIDIC MEDIUM

2021 ◽  
Author(s):  
Petar Stanić ◽  
◽  
Nataša Vukićević ◽  
Vesna Cvetković ◽  
Miroslav Pavlović ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mild Steel ◽  
Acidic Medium ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Electrochemical Investigation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hcl Solution ◽  
Scanning Electron

Four 2-thiohydantoin derivatives were synthesized and their corrosion inhibition properties on mild steel (MS) in 0.5M HCl solution was evaluated using usual gravimetric and electrochemical methods (weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS). Morphology of the metal surface was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The study has shown that these compounds provide good protection for mild steel against corrosion in the acidic medium.

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