The Evaluation of Coating Performance by Analyzing the Intersection of Bode Plots

摘要

In this paper, a new parameter named as IBP (intersection of Bode plots) was proposed to evaluate thecoating performance by directly analyzing the Bode plots. The electrochemical impedance data ofthree coating systems in 3.5% sodium chloride solution were measured and the IBP correlated wellwith the results of coating resistance Rc and low frequency impedance |Z|0.1Hz. It is concluded that IBPcan be used for the evaluation of coating performance in practical applications.