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Experimental investigation of new compound adsorption on carbon steel in 1M HCl

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Title Experimental investigation of new compound adsorption on carbon steel in 1M HCl
 
Creator Jafari, Hojat
Soltanolkottabi, Fariba
Behrouzfar, Mohamad Mostafa
Ameri, Elham
Danaee, Iman
 
Subject Adsorption isotherm
Corrosion inhibitor
Corrosion rate
Free energy of adsorption
Ligand
Synergistic effect
Synthesis
 
Description 117-123
The effect of new compounds named, 6,6'-(((2,2-dimethylpropane-1,3-diyl)bis(azanediyl))bis(methylene))bis(2-
methoxyphenol) (RSH) on the corrosion inhibiting of ST- 37 low carbon steel in 1.0 M HCl has been studied. The inhibitor
effects on the corrosion behaviour of the samples have been determined at three different concentrations, 0.5, 1.0, 1.5 and
2.0 mg/L. Weight loss, polarization curves, AC impedance measurements and Atomic Force Microscopy (AFM) have been
utilized to study the corrosion behaviour of carbon steel in corrosive environment in the presence and absence of new ligand.
Results show that the inhibition occurs through adsorption of the inhibitors molecules on the metal surface. The inhibition
efficiency was found to increase with increasing inhibitor’s concentration. Polarization data indicated that this compounds
act as mixed-type inhibitors. The corrosion efficiency of RSH at an optimal concentration of 2mg/L is 86. The adsorption of
inhibitors follows the Langmuir isotherm. The values of free energy of adsorption in the presence of the corrosion inhibitor
are around -32 KJmol-1, which indicate chemiosorption of the molecules. Powerful Atomic Force microscopy is used for the
surface morphology studies.
 
Date 2023-01-27T06:35:56Z
2023-01-27T06:35:56Z
2023-01
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/61291
https://doi.org/10.56042/ijct.v30i1.63539
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJCT Vol.30(1) [January 2023]