The inhibition performance of three selected dihydrazide derivatives, namely, malonic acid (MAD), succinic acid (SAD), and adipic acid (AAD) dihydrazide, was tested in relation to nickel corrosion in 1.0 M sulfuric acid (H2SO4) solution. Electrochemical methods (Tafel polarization, linear polarization resistance [LPR], and electrochemical impedance spectroscopy [EIS]) were used, complemented with scanning electron microscopy/energy-dispersive x-ray (SEM/EDX) examinations. Computational studies were also used to confirm experimental findings and to optimize the adsorption structures of dihydrazide derivatives. Results showed that the three tested dihydrazides inhibited Ni corrosion (mixed-type inhibitors) to an extent, depending on the type and concentration of the introduced inhibitor. SEM studies revealed that the corroded areas on the surface were decreased in the presence of additives to an extent, depending on the type and concentration of the tested inhibitor. Results obtained from electrochemical measurements are in good agreement with theoretical studies.
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1 August 2012
Research Article|
May 16 2012
Nickel Corrosion Inhibition in Sulfuric Acid—Electrochemical Studies, Morphologies, and Theoretical Approach Available to Purchase
M.A. Amin;
‡ Corresponding author. E-mail: [email protected].
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* Materials and Corrosion Laboratory, Department of Chemistry, Faculty of Science, Taif University, 888 Hawiya, Saudia Arabia.
** Department of Chemistry, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egpyt.
*** Chemistry Department, Faculty of Applied Science, Umm-Al Qura University, Makkah, Saudia Arabia.
**** Chemistry Department, Faculty of Science, Kafr El-Sheikh University, Kafr El-Sheikh 33516, Egypt.
‡ Corresponding author. E-mail: [email protected].
Received:
August 06 2011
Accepted:
December 03 2011
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2012 NACE International
2012
CORROSION (2012) 68 (8): 699–712.
Article history
Received:
August 06 2011
Accepted:
December 03 2011
Citation
M.A. Amin, H. Shokry, E.M. Mabrouk; Nickel Corrosion Inhibition in Sulfuric Acid—Electrochemical Studies, Morphologies, and Theoretical Approach. CORROSION 1 August 2012; 68 (8): 699–712. https://doi.org/10.5006/0508
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