Next Article in Journal
Previous Article in Journal
Int. J. Mol. Sci. 2013, 14(6), 11915-11928; doi:10.3390/ijms140611915
Article

Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies

1
, 1,2,* , 3
, 1
 and 1
Received: 27 February 2013; in revised form: 22 May 2013 / Accepted: 24 May 2013 / Published: 4 June 2013
View Full-Text   |   Download PDF [464 KB, uploaded 19 June 2014]
Abstract: 1,5-Dimethyl-4-((2-methylbenzylidene)amino)-2-phenyl-1H-pyrazol-3(2H)-one (DMPO) was synthesized to be evaluated as a corrosion inhibitor. The corrosion inhibitory effects of DMPO on mild steel in 1.0 M HCl were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, open circuit potential (OCP) and electrochemical frequency modulation (EFM). The results showed that DMPO inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiency increased with increasing inhibitor concentration. Changes in the impedance parameters suggested an adsorption of DMPO onto the mild steel surface, leading to the formation of protective films. The novel synthesized corrosion inhibitor was characterized using UV-Vis, FT-IR and NMR spectral analyses. Electronic properties such as highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy (EHOMO and ELUMO, respectively) and dipole moment (μ) were calculated and discussed. The results showed that the corrosion inhibition efficiency increased with an increase in the EHOMO values but with a decrease in the ELUMO value.
Keywords: corrosion inhibitor; electrochemical impedance spectroscopy; 2-methylbenzaldehyde corrosion inhibitor; electrochemical impedance spectroscopy; 2-methylbenzaldehyde
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Junaedi, S.; Al-Amiery, A.A.; Kadihum, A.; Kadhum, A.A.H.; Mohamad, A.B. Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies. Int. J. Mol. Sci. 2013, 14, 11915-11928.

AMA Style

Junaedi S, Al-Amiery AA, Kadihum A, Kadhum AAH, Mohamad AB. Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies. International Journal of Molecular Sciences. 2013; 14(6):11915-11928.

Chicago/Turabian Style

Junaedi, Sutiana; Al-Amiery, Ahmed A.; Kadihum, Abdulhadi; Kadhum, Abdul A.H.; Mohamad, Abu B. 2013. "Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies." Int. J. Mol. Sci. 14, no. 6: 11915-11928.



Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert