Electrochemical Noise Methods (ENM) have been employed to evaluate corrosion resistance of aircraft coatings in accelerated testing environments, such as alternating QUV/Prohesion exposure, flow electrolyte immersion, and constant immersion with various concentration electrolytes. ENM measurements were performed on aluminum 2024 T-3 substrates coated with epoxy and urethane aircraft coatings against exposure time. First order exponential decay function was employed to fit the noise resistance time series data. Results have shown the usefulness of ENM in investigating corrosion protection and lifetime prediction of aircraft coatings.