Features of the local activation of aluminum in the presence of bicarbonate ions
Abstract
The purpose of the article is to study the effect of bicarbonate ions on the local activation of aluminum at a temperatureof 25 °C.
The features of local activation of aluminum in the presence of bicarbonate ions (2·10–4–4·10–3 M) were studied using the methods of voltammetry, chronoamperometry, optical and scanning electron microscopy, and X-ray spectral microanalysis.
As a result, we established the range of sodium bicarbonate concentrations, in which there is local activation of aluminum; obtained experimental data on the dependence of the main quantitative characteristics of the process (potential of pitting formation, potential of local activation, and induction period) on the concentration of sodium bicarbonate. Formal kinetic approach was used to propose a mechanism for the local activation of aluminum in hydrocarbonate media
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