Examination of Repairing Methods of Weathering Steel by Painting

Abstract

When weathering steels are applied to bridges located in the area with heavy contamination of salts or anti-freezing agents, some cases show generation of stratified loose rust layer on weathering steel in stead of intended protective rust layer formation. We studied repairing method of those weathering steels with undesired rust generation by painting. As a result, power tool cleaning is not effective enough to remove rusts with salts contamination.The remained salts in the rust affect performance of the repaired paint film and show unsatisfied anti-corrosive property.