The phenomenological investigations herein are motivated by an educational background in electrochemistry for electrocatalysts, that corrosion is, on a first-order approximation, defined by the time spent at a potential. Yet, studies that aim to investigate or mitigate corrosion (or degradation) in batteries actuate on current and not potential to mitigate corrosion. This manuscript concludes with what I believe to be a prototype building block for a Pourbaix diagram for batteries.