If certainty is required about the condition of the coating for planning maintenance in the long term, Electrochemical Impedance Spectroscopy (EIS) measurements can be performed. Electrochemical Impedance Spectroscopy can also be the answer when investigating local defects and the substrate before applying a new coating or before blast cleaning.

Electrochemical Impedance Spectroscopy, abbreviated EIS, measures the protective effect and the corrosion beneath the intact coating in the long term. It can also help establish any initial disbonding and corrosion beneath the coating. As a result, the condition of the protective coating can be determined well before visual defects become visible.

The NACE coating inspector can perform the Electrochemical Impedance Spectroscopy on location.