Does anyone face the sinusoidal instability in OCP (Open circuit potential) and consequently irregular EIS results from epoxy coatings?

Dear All I have tested epoxy-coated steels (with thickness about 100 micron) in CO2 saturated NaCl solution. OCP did not become stable (with high voltage range about 1V ) even after a week...

13 July 2018 3,459 16 View