研究指出,在添加一定浓度的OH~-、CO_3~(2-)、PO_4~(3-)、HC_3~-、Cr_2O_7~(2-)、H~+等离子后,分别由于以下某一种原因:(1)增大[OH~-],(2)加速界面FeSO_4的溶解,(3)发生新的电极反应,(4)阴碍铁的氧化膜形成,会改变Fe/0.5mol·L~(-1)Na_2SO_4体系的刚极极化行为。磁场会按离子种类及浓度改变它们在参与Fe/Na_2SO_4电极反应中的地位,会增大铁在酸性、中性和弱碱性Na_2SO_4溶液中的阳极电流密度。
Experimental reaults showed that additional ions (OH-, CO32-, HCO3- ,PO43- ,Cr2O72-, H+) present at a certain concentration in Na2SO4 solution would alter the anodic polarization curves of Fe/0.05 mol·L-1 Na2SO4 system. That could be attributed to one of the following causes: (1) increases in [OH-]; (2) acceleration of FeSO4 dissolution at interface; (3) occurrence of new electrode reaction and (4) obstruction of the formation of iron oxide film. Magnetic field would change the role of additional anions in the anodic reaction of Fe/Na2SO4 system to some extent dependent on their species and concentrations. Besides, magnetic field would increase the anodic current density in acid, neutral and weak alkaline solutions.
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