Stripping voltammetric and conductance measurements on corrosion and inhibition of copper in nitric acid

The kinetics of copper dissolution in nitric acid especially, the phase of dissolution at the beginning of incubation period was investigated. Two techniques, the anodic stripping voltammetry and the conductance measurements, were used for the first time in this concern. Galvanostatic polarization m...

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Bibliographic Details
Published in:Materials chemistry and physics 2001-09, Vol.71 (3), p.279-290
Main Authors: Khodari, M, Abou-krisha, M.M, Assaf, F.H, El-Cheikh, F.M, Hussien, A.A
Format: Article
Language:English
Subjects:
Anodic stripping voltammetry
Applied sciences
Copper
Corrosion
Corrosion tests
Dissolution rate
Exact sciences and technology
Inhibition
Metals. Metallurgy
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Summary:The kinetics of copper dissolution in nitric acid especially, the phase of dissolution at the beginning of incubation period was investigated. Two techniques, the anodic stripping voltammetry and the conductance measurements, were used for the first time in this concern. Galvanostatic polarization measurements using very simple circuit used to study the corrosion process of copper in nitric acid. The effect of several factors was studied, namely nitric acid concentration, the copper surface area and stirring. The effect of inorganic substances and their role as inhibitors or promoters was also investigated. By applying the anodic stripping voltammetric technique it was found that the rate of copper dissolution during the incubation period is constant and time independent. Also, stirring prevents the corrosion of copper almost completely.
ISSN:0254-0584
1879-3312
DOI:10.1016/S0254-0584(01)00291-7