Potential Measurements with Reference Electrodes
Electrode potential measurement is an important aspect of corrosion studies and corrosion prevention. This article illustrates the three-electrode device used to determine the electrode potential of the electrode. A good reference electrode must reach its potential quickly, be reproducible, and remain stable with time. The article reviews stable and reproducible potential, low polarizability, and the liquid junction potential, which helps in reference electrode selection. It discusses operating conditions for reference electrodes with emphasis on very low current density and the current and resistance drop and its mitigation.