An investigation of adhesion salts on the surface of weathering steel bridges in Yamaguchi prefecture

Weathering steel has been used increasingly for structural components of steel bridges due to high resistance of corrosion. It can be used for constructions without anticorrosion coating. However, in some cases,very severe surface corrosion has been observed. This paper reports accumulating salt on the weathering steel bridges in Yamaguchi prefecture. Accumulating salts on bridges were analyzed by ion-exchange chromatography. Composition and quantity of accumulating salts, relationship between rust thickness and Cl- are discussed. Regional differences of accumulating salts are also described.

weathering steel bridge

accumulating salt

corrosion state