QUANTITATIVE ANALYSIS ON DETERIORATION AND REMAINING LIFE OF STEEL BRIDGE PAINTING BASED ON FIELD DATA

Abstract

With the results of field investigations and outdoor exposure experiments of painted specimens, time-lapse deterioration of paintings was statistically analyzed by using “Automatic Evaluation System for Paint Film Deterioration” in order to establish deterioration curves logically. Quadratic curves were found to be well fitted to the paint film deterioration within the practical period of 10 to 20 years. Estimation curves were established for three corrosive environments such as mild environment, seashore environment, and tropical environment (hot and highly humid).