Inhibitive Effect of 2-[4-(Dimethylamino) Benzylidene] Hydrazinecarbothioamide on Corrosion of Mild Steel in Acidic Solution
- Authors: Prithvi 1, Kumari P.1, Rao S.A1
- 
							Affiliations: 
							- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education
 
- Issue: Vol 55, No 4 (2019)
- Pages: 481-491
- Section: Article
- URL: https://journals.rcsi.science/1068-3755/article/view/231323
- DOI: https://doi.org/10.3103/S1068375519040112
- ID: 231323
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Abstract
The inhibition efficiency and adsorption of 2-[4-(dimethylamino) benzylidene] hydrazinecarbothioamide (DABHC) on the corrosion behaviour of mild steel in 0.5M H3PO4 and H2SO4 solutions has been studied in the temperature range (30–50°C) using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. The inhibition effectiveness of DABHC increases with increase in its concentration and decreases with increase in temperature. The results indicate that DABHC functions as a mixed type inhibitor and followed Langmuir’s adsorption isotherm. The corrosion inhibition of DABHC takes place through physisorption. The surface of the specimen was analysed using scanning electron microscope (SEM) and atomic force microscopy (AFM).
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About the authors
Prithvi
Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education
														Email: suma.rao@manipal.edu
				                					                																			                												                	India, 							Manipal, 576104						
Preethi Kumari
Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education
														Email: suma.rao@manipal.edu
				                					                																			                												                	India, 							Manipal, 576104						
Suma A Rao
Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education
							Author for correspondence.
							Email: suma.rao@manipal.edu
				                					                																			                												                	India, 							Manipal, 576104						
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