摘要
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.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1998年第2期119-125,共7页
Journal of Chinese Society For Corrosion and Protection
关键词
磁场
附加离子
阳极极化
铁
硫酸钠
污水处理
Effect of magnetic field, Effect of additional ions, Anodic polarization behavior
