CIESC Journal ›› 2016, Vol. 67 ›› Issue (S1): 341-346.doi: 10.11949/j.issn.0438-1157.20151753

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Anodic behavior of Fe in acidic AlCl3-EMIC ionic liquid

YANG Yang, XUE Dongpeng, LING Guoping   

  1. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2015-11-23 Revised:2015-12-07 Online:2016-08-31 Published:2016-08-31
  • Supported by:

    supported by the National Natural Science Foundation of China (51271166).

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Abstract:

The anodic behavior of Fe in 2:1 acidic AlCl3-1-ethyl-3-methyl-imidazolium chloride (AlCl3-EMIC) ionic liquid was investigated in this paper. Anodic polarization and chronoamperometry was measured using three-electrode system. The valence state of dissolved Fe was calculated by potentiostatic process. The surface morphologies of Fe were characterized using a scanning electron microscopy (SEM). The results showed that the oxide film would restrain the dissolution of Fe. After the oxide film was removed, Fe began to dissolve at the potential of -0.35 V versus Pt. The anodic current density increased rapidly to a maximum with the positive shift of potential and than decreased abruptly. The product existed in the form of Fe(Ⅱ). After galvanostatic process at 2 mA·cm-2, the surface of Fe showed a pitting morphology, which became homogeneous as time prolonged. With a larger anodic current applied (15 mA·cm-2), no obvious corrosion occurred on the surface of Fe electrode with precipitate formed.

Key words: Fe, AlCl3-EMIC ionic liquid, anodic behavior

CLC Number: 

  • TQ153
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