Process of magnetite dissolution in orthophosphoric and sulfuric acid solutions according to kinetic and electrochemical methods

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The kinetics of dissolution and the electrochemical features of the behavior of magnetite (at cathodic polarization) in solutions of sulfuric and orthophosphoric acids have been studied. Two independent experimental methods established that the rate and current of dissolution in H3PO4 are higher than in H2SO4. This pattern is explained on the basis of the stronger complexing properties of various kinds of phosphate anions in comparison with sulfate anions in solution with iron(III) ions. In the range of studied concentrations of orthophosphoric and sulfuric acids, Fe(II) and Fe(III) ions, the orders of magnitude for orthophosphoric and sulfuric acids are 1.3 ± 0.1; for iron(II) ions – 0.25 ± 0.1, for iron(III) ions – -0.25 ± 0.1

作者简介

A. Kuzin

Moscow Pedagogical State University; Bauman Moscow State Technical University

编辑信件的主要联系方式.
Email: av.kuzin@mpgu.su
俄罗斯联邦, Moscow; Moscow

A. Lobanov

Moscow Pedagogical State University

Email: av.kuzin@mpgu.su
俄罗斯联邦, Moscow

V. Shelonzev

Omsk Humanitarian Academy

Email: av.kuzin@mpgu.su
俄罗斯联邦, Omsk

E. Eliseeva

Bauman Moscow State Technical University

Email: av.kuzin@mpgu.su
俄罗斯联邦, Moscow

A. Samadov

Tajik National University

Email: av.kuzin@mpgu.su
塔吉克斯坦, Dushanbe

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