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Journal article

Novel dual microelectrode probe for the simultaneous visualization of local Zn 2+ and pH distributions in galvanic corrosion processes

Filotás D, Fernández-Pérez B, Izquierdo J, Nagy L, Nagy G, Souto R ...see all

Corrosion Science, vol. 114 (2017) pp. 37-44

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Abstract

a b s t r a c t Novel dual potentiometric microsensor probe has been developed for the simultaneous detection of Zn 2+ concentration and pH distributions in the Scanning Electrochemical Microscopy investigation of corrod-ing galvanized steel. The individual sensors show nearly theoretical behavior over a wide concentration range. The applicability of this probe is first demonstrated on a Fe-Zn galvanic couple, as it shows excel-lent performance in these simultaneous model experiments. In addition, linear scans recorded over a cut edge of coated galvanized steel evidence the complementary information gathered on the electrochemi-cal behavior of the corroding sample, and adumbrates promising and feasible applications of multi-barrel microelectrodes in corrosion research.

Author-supplied keywords

  • A. Iron
  • A. Metal coatings
  • A. Zinc
  • C. Anodic dissolution
  • C. Oxygen reduction
  • C. Paint coatings

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Authors

  • D Filotás

  • B M Fernández-Pérez

  • J Izquierdo

  • L Nagy

  • G Nagy

  • R M Souto

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