On the use of mercury-coated tips in scanning electrochemical microscopy to investigate galvanic corrosion processes involving zinc and iron. R.M. Souto, Y. González-García, D. Battistel, S. Daniele. Corrosion Science, 55, 401-406 (2012) doi: 10.1016/j.corsci.2011.11.003

Abstract

The corrosion processes that take place in an iron-zinc galvanic pair exposed to a chloride solution were investigated by scanning electrochemical microscopy (SECM) using a mercury-coated platinum microelectrode as SECM tip. Both the release of zinc ions and the consumption of dissolved oxygen that occur in separate sites at the iron-zinc galvanic pair were monitored. Zinc ions quantification could be performed by stripping the zinc metal collected at the Hg-coated tip using linear sweep voltammetry