Abstract

The influence of a number of parameters (temperature, pH, the concentrations of orthophosphoric acid and ions in the electrolyte) on the kinetic laws of the dissolution of magnetite Fe₃O₄ in acidic solutions is studied. The nature of the potential-determining reaction in magnetite electrode–electrolyte solution systems is determined. The experimental results prove that the dissolution of oxide phases can be stimulated by iron, which affects the potential at the iron oxide/electrolyte solution interface. The reaction orders of the magnetite dissolution processes with respect to hydrogen cations, Fe(II) and Fe(III) ions, dihydrophosphate anions, and H₃PO₄ are determined.

中文翻译：

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磁铁矿在正磷酸中的溶解：研究和建模

摘要

研究了许多参数（温度，pH，电解质中正磷酸和离子的浓度）对磁铁矿Fe ₃ O ₄在酸性溶液中溶解的动力学规律的影响。确定了磁铁矿电极-电解质溶液系统中确定电位的反应的性质。实验结果证明，铁可促进氧化物相的溶解，从而影响铁氧化物/电解质溶液界面的电势。确定磁铁矿溶解过程相对于氢阳离子，Fe（II）和Fe（III）离子，二氢磷酸根阴离子和H ₃ PO ₄的反应顺序。