부산대학교 도서관

Relationships between deteriorated coating surface conditions of laboratory test panels determined by image processing software and coating impedance data collected with electrochemical impedance spectroscopy (EIS) were investigated. A unique relationship was found between the log |Z|0·1 values of experimental EIS data and the corresponding deteriorated area ratios determined by the image processing method. A well defined one to one relationship was also found between log |Z|0·1 values and log (Rpo) values extracted through EIS data fitting analysis. This study demonstrates that estimation of log (Rpo) at a certain deterioration stage is feasible via field image processing alone without running in situ EIS measurements and going through time consuming EIS fitting analysis. A field coating maintenance program established by this methodology can be an effective tool for bridge maintenance engineers who need to make timely decisions on coating repair/rehabilitation work based on the quantitative 'visual' image scan results and 'invisible' coating pore resistance. [ABSTRACT FROM AUTHOR]