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A Novel Hydrazinecarbothioamide as a Potential Corrosion Inhibitor for Mild Steel in HCl
Department of Chemical & Process Engineering, Universiti of Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia
Applied Chemistry Division, Applied Science Department, University of Technology (UOT), Baghdad 10001, Iraq
* Author to whom correspondence should be addressed.
Received: 6 January 2013; in revised form: 15 February 2013 / Accepted: 1 March 2013 / Published: 2 April 2013
Abstract: 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.
Keywords: mild steel; thiosemicarbazide; EIS; HCB; corrosion inhibition
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MDPI and ACS Style
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.
Al-Amiery AA, Kadhum AAH, Mohamad AB, Junaedi S. A Novel Hydrazinecarbothioamide as a Potential Corrosion Inhibitor for Mild Steel in HCl. Materials. 2013; 6(4):1420-1431.
Al-Amiery, Ahmed A.; Kadhum, Abdul A.H.; Mohamad, Abu B.; Junaedi, Sutiana. 2013. "A Novel Hydrazinecarbothioamide as a Potential Corrosion Inhibitor for Mild Steel in HCl." Materials 6, no. 4: 1420-1431.