In-situ corrosion sensor for coating testing and screening

An in-situ corrosion sensor facilitates coating development and screening b y detecting the early stages of corrosion well before degradation is visibl e. Based on electrochemical impedance spectroscopy (EIS), the sensor extend s the use of this established laboratory technique from immersion only to d ifferent accelerated test conditions (such as salt fog or humidity) and amb ient service environments. By enabling a direct quantitative comparison of the early stages of coating deterioration and substrate corrosion that occu r in laboratory accelerated tests and service or field conditions, the labo ratory tests can be validated and coatings screened more quickly.