Corrosion inhibition of copper in near neutral aqueous solutions by gamma-pyrodiphenone |
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| Authors: | G. Petkova E. Sokolova S. Raicheva P. Ivanov |
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| Affiliation: | (1) Central Laboratory of Electrochemical Power Sources, Bulgaria Academy of Sciences, 1113 Sofia, Bulgaria;(2) Department of Physical Chemistry, University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria;(3) Laboratory on Surface Analysis, DZU, 6300 Stara Zagora, Bulgaria |
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| Abstract: | The inhibition effect of gamma-pyrodiphenone ( PD) on copper corrosion in near neutral sulphate solutions was investigated. Weight loss and polarization measurements show a high inhibition efficiency (>96%) of PD on copper corrosion at extremely low concentrations. PD suppresses active copper dissolution and oxygen reduction. The potentiodynamic cathodic reduction measurements showed an inhibition of oxide formation and stabilization of the Cu2O oxide in the presence of PD. XPS measurements suggested that the high inhibition effect of PD on copper corrosion is due to the adsorption of PD molecules, as a first stage, and the formation of a film with a polymer-like structure by coordination of PD with Cu2O on prolonged exposure. |
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| Keywords: | copper corrosion inhibition gamma-pyrodiphenone XPS |
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