抄録
Newly developed surface treatment of conventional weathering steel and high atmospheric corrosion resistant Ni containing steels for the use of construction such as bridges in coastal environments were reviewed. The surface treatment have been developed to promote the formation of protective rust layer and to suppress the stain of concrete by rust-laden water at early stages for use. New Ni containing steels have been used under uncoated condition have higher tolerable limiting amount of air-borne sea salt particles compared that of conventional weathering steel. The evaluation method for the atmospheric corrosion resistance of these materials used in coastal area were also discussed from the standpoint of concentration of the thin chloride solution layer formed on the surface with an decrease in humidity.
