Table 3.

Explanation of metrics derived from cyclic potentiodynamic polarization (PDP) curves (Fig. 3)*

PDP metric	Symbol	Unit	Explanation
Corrosion potential	Ecorr	V (versus SCE)	Measure of an alloy’s overall corrosion tendency; under equal conditions, a higher Ecorr indicates a lower corrosion tendency
Corrosion current density	Icorr	mA/cm2	Measure of an alloy’s corrosion rate; under equal conditions, a higher Icorr is directly related to a higher metal ion release rate
Pitting potential	Epit	V (versus SCE)	The pitting potential is an indicator of an alloy’s receptivity for pitting corrosion; under equal conditions, a higher Epit indicates better protection of pitting corrosion

* E_corr and E_pit are measured relative to the reference electrode (saturated calomel electrode [SCE]).