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Open AccessArticle

A Novel Hydrazinecarbothioamide as a Potential Corrosion Inhibitor for Mild Steel in HCl

1
Department of Chemical & Process Engineering, Universiti of Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia
2
Applied Chemistry Division, Applied Science Department, University of Technology (UOT), Baghdad 10001, Iraq
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Author to whom correspondence should be addressed.
Materials 2013, 6(4), 1420-1431; https://doi.org/10.3390/ma6041420
Received: 6 January 2013 / Revised: 15 February 2013 / Accepted: 1 March 2013 / Published: 2 April 2013
(This article belongs to the Special Issue Corrosion Monitoring and Control)
2-(1-methyl-4-((E)-(2-methylbenzylidene)amino)-2-phenyl-1H-pyrazol-3(2H)-ylidene)-hydrazineecarbothioamide (HCB) was synthesized as a corrosion inhibitor from the reaction of 4-aminoantipyrine, thiosemicarbazide and 2-methylbenzaldehyde. The corrosion inhibitory effects of HCB on mild steel in 1.0 M HCl were investigated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The results showed that HCB inhibited mild steel corrosion in acidic solution and inhibition efficiency increased with an increase in the concentration of the inhibitor. The inhibition efficiency was up to 96.5% at 5.0 mM. Changes in the impedance parameters suggested that HCB adsorbed on the surface of mild steel, leading to the formation of a protective film. The novel corrosion inhibitor synthesized in the present study was characterized using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) spectral data. View Full-Text
Keywords: mild steel; thiosemicarbazide; EIS; HCB; corrosion inhibition mild steel; thiosemicarbazide; EIS; HCB; corrosion inhibition
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Al-Amiery, A.A.; Kadhum, A.A.H.; Mohamad, A.B.; Junaedi, S. A Novel Hydrazinecarbothioamide as a Potential Corrosion Inhibitor for Mild Steel in HCl. Materials 2013, 6, 1420-1431.

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