Effects of the magnetic field on the anodic dissolution of Ni | H3PO4 + KSCN system

作者：Liu, Shuaibin; Shao, Yu; Yan, Changqi; Yuan, Boyu; Li, Liang^*; Wang, Chao^*

来源：Corrosion Science, 2020, 169: 108614.

DOI：10.1016/j.corsci.2020.108614

• Nickel
• Magnetic field
• KSCN
• Anodic dissolution
• Intergranular corrosion
• Digital holography

Dynamic processes at the Ni vertical bar 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.

• 单位
  江苏师范大学