The common value
of the anodic and cathodic partial currents when the reaction is at equilibrium
For an electrode at equilibrium at which only one reaction is significant
When more than one reaction is significant at a given electrode, subscripts to
may be used to distinguish exchange currents.
is not usually zero when only one of these reactions is at equilibrium.
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook