Abstract

Vadim Nikolaevich Statsyuk¹, Sauyk Ait³, Lidiya Alekseevna Fogel¹, Murat Zhurinovich Zhurinov¹ and Aleksei Aleksandrovich Abrashov²

DOI : http://dx.doi.org/10.13005/ojc/330620

A relationship between the adsorption capacity of 2,2/ -dipyridyl, 4,4/ -dipyridyl heterocyclic amines, 1,10-phenanthrolin and Fe (dipy)₃²⁺ complex on mercury with the corrosive activity of these compounds on the iron electrode by cyclic voltammetry was established. The use of this method made it possible to establish a regularity between the process of the iron electrode ionization and the appearance of a current maximum due to the electroreduction of corrosion products on the cathode volt-ampere curves. It was found that 4,4/ -dipyridyl, isomer of 2,2/ -dipyridyl, has a stronger interaction of π-electrons with the surface of mercury and a flat arrangement on the surface of the electrode, which contributes to its more corrosive activity. It should be noted that 4,4/ -dipyridyl is able to form polymer low solubility compounds with metal ions, whereas 2,2/-dipyridyl and 1,10-phenanthroline form chelate soluble complexes with Fe (II). Unlike molecules of 2,2/ -dipyridyl, which inhibit corrosion processes, complex compounds Fe (dipy)₃²⁺,  being corrosion products, lead to increased corrosion.

Anodic Dissolution; Cathodic Maximum; Cyclic Voltammetric Curves; Initial Potential; Potential Sweep Rate

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