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The anodic dissolution of iron and the behaviour of some corrosion inhibitors investigated by the potentiodynamic method

โœ Scribed by (The late) L. Cavallaro; L. Felloni; G. Trabanelli; F. Pulidori

Publisher
Elsevier Science
Year
1964
Tongue
English
Weight
645 KB
Volume
9
Category
Article
ISSN
0013-4686

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โœฆ Synopsis

Ahstr&-The influence of the anion, of oxygen and of some corrosion inhibitors on the shape of the anodic polarization curve of iron has been investigated by the potentiodynamic method, under controlled conditions.

For samples annealed in hydrogen atmosphere in N HCIO, the anodic polarization curve shows two distinct slopes, 60 mV at low current densities and of 30 mV at higher current densities. In N HISO,I the slopes are respectively of 70 mV and 40 mV. A single slope of 60 mV is obtained in HCl solution. A comparison of these results is made with those obtained by other authors by the transient method.

The small influence of iodide ions on the polarization curves obtained in the presence of phenylthiourea seems to demonstrate that this compound is adsorbed in molecular rather than ionic form. As expected, the inhibiting power of polybutanimine is increased by the presence of iodide ions.

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