The Effects of Hydrogen on Reactivation of Iron in Alkaline Solutions

摘要

Effects of hydrogen on interfacial behavior of iron in alkaline solutions were investigated by electrochemical measurements using a Devanathan dual cell. Hydrogen could cause a change of open circuit state from passivity to active dissolution, caused the active dissolution range and current density peaks in anodic polarization curves, and decreased the electrochemical impedance for iron in dilute bicarbonate solutions. Hydrogen increased the anodic current and decreased the electrochemical impedance for iron in solutions with high pH values and high concentrations of bicarbonate. The effects of charged hydrogen on reactivation of iron dissolution and passive film stability as well as the interaction with solution chemistry were investigated analyzed.