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Report No.

Modelling of atmospheric corrosion considering environment factors

Igarashi, Takahiro  ; Komatsu, Atsushi ; Kato, Chiaki   ; Sakairi, Masatoshi*

Large structures such as bridges and nuclear facilities in the sea shore area are exposed to a severe corrosive environment by airborne sea salt. From the viewpoint of ensuring facility safety and environmental and energy issues, it is one of the important themes to elucidate the mechanism of atmospheric corrosion of steel materials, which are the main materials of large structures. In the study, we modified existing model in which precipitation and humidity were considered as influential factors for atmospheric corrosion, and developed a novel model for predicting atmospheric corrosion loss with additional consideration of temperature. The developed model corrected the excessive prediction of corrosion amount by the existing model, and enabled more precise prediction of atmospheric corrosion weight loss.



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