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