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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Inhibition of copper corrosion in 3.0% NaCl solution by N-phenyl-1,4-phenylenediamine
Journal of the Electrochemical Society, Volume 152, No. 10, Year 2005
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Description
Inhibition of copper corrosion by N-phenyl-1,4-phenylenediamine (NPPD) has been investigated in deaerated, aerated, and oxygenated aqueous 3.0% NaCl solutions using potentiodynamic polarization, electrochemical impedance spectroscopy, weight loss, infrared and UV-visible absorption spectroscopic, scanning electron microscopic (SEM), and energy-dispersive X-ray (EDX) measurements. Potentiodynamic polarization measurements showed that the presence of NPPD significantly decreases cathodic, anodic, and corrosion currents in these solutions. Impedance measurements indicated that the charge-transfer resistances increase upon increasing the NPPD concentration. The inhibition efficiency of 1.0 mM NPPD obtained by weight-loss measurements is about 90%, increasing to about 96% at its concentration of 5.0 mM. Fourier transform infrared, UV-visible, SEM, and EDX measurements revealed that NPPD is adsorbed on the copper surface at open-circuit potentials, preventing copper from being corroded by forming a protective layer on its surface. All these results showed that corrosion of copper decreases in the order of oxygenated > aerated > deaerated solutions, and NPPD is a good mixed-type inhibitor for copper corrosion with its inhibition efficiency in the order of oxygenated > aerated > deaerated solutions. © 2005 The Electrochemical Society. All rights reserved.
Authors & Co-Authors
Sherif, El Sayed M.
South Korea, Pohang
Pohang University of Science and Technology
Egypt, Giza
National Research Centre
Park, Su Moon
South Korea, Pohang
Pohang University of Science and Technology
United States, Pennington
The Electrochemical Society
Statistics
Citations: 182
Authors: 2
Affiliations: 3
Identifiers
Doi:
10.1149/1.2018254
ISSN:
00134651