Abstract
We investigated systems of steel 20 with nickel and zinc coating in a 3% NaCl solution, distilled water, and a 45 · 10 −3 % H 2 SO 4 + 0.14 H 2 O 2 + 5 · 10 −6 % K 2 Cr 2 O 7 solution using capillary probes filled with these environments. After their use, errors in measurements in the volume of the electrolyte are absent. The low conductance of the electrolyte and the dissolution of the metal in the active state are necessary conditions for adequate measurements of local electrode potentials. It is established that the accuracy of local microelectrochemical measurements in an electrolyte drop is higher than that in an electrolyte film.
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