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The anodic dissolution of iron-VIII: the influence of ionic strength on reaction orders with respect to anions

✍ Scribed by G. Bech-Nielsen

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 716 KB
Volume: 23
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(78)87041-8

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✦ Synopsis

A&r&-The purpose of the present paper concerned with the anodic dissolution of iron is to examine the earlier reported reaction orders ofanions, supplemented by a few results from this laboratory, and to attempt a consistent interpretation ofapparently conflicting observations, based on a recently proposed model for the anodic reactions of iron.

To solve the problems two important pointsmust be considered. Firstly, the dissolution ofiron takes place via two reactions of inherently different characteristics, and appropriate association of observations with the two paths removes some apparent divergencies. Secondly, to account for discrepancies still observed in a group of observations for one of the paths, due regard should be given to the exact position of reaction intermediates of different steps and of anions within the double layer. A deciding factor for the behaviour of anions in one particular step appears to he, whether this step takes place in a region of potentials slightly positive towards the point of zero charge or in one at rather higher potentials.

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