1. A method of determining an electrochemical response of a test coupon, the method comprising: applying a cell of electrolyte solution to a test region on a test coupon; contacting the electrolyte solution with a counter electrode; applying a mechanical load to the test coupon to produce a deflection event; before applying the mechanical load, measuring a pre-event value of an electrical parameter of the test coupon; after applying the mechanical load, measuring a post-event value of the electrical parameter; and determining an electrochemical response of the test coupon to the mechanical load based on the post-event value and the pre-event value.