Abstract
Dynamic processes at the Ni│H3PO4+KSCN interface during the anodic dissolution were observed in situ without and with the magnetic field (MF) by the digital holography. Potentiostatic current oscillations appeared in the pre-passive region, because the newly-formed NiOOH passive layer could be dissolved by SCN− ions. MF enhanced the mass-transport step and accelerated the dissolution of the surface film, which changed the current oscillations into the active dissolution in the pre-passive region and induced the current oscillations at the potential near the passive region. Moreover, MF promoted the SCN−- induced intergranular corrosion.
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