Japan Society of Civil Engineers 2020 Annual Meeting
Sep 9 - Sep 11, 2020Held Online
Japan Society of Civil Engineers 2020 Annual Meeting
Sep 9 - Sep 11, 2020Held Online
[I-29]Deterioration mechanism of hot-dip Al coating in a coastal-atmospheric environment
〇Muye Yang1, Shigenobu Kainuma1, Yang Gao1, Mikio Hashimoto2(1.Kyushu University, 2.Shinko Alumer Industries Co., Ltd.)
Keywords:
Hot-dip Al coatings,Corrosion,Deterioration mechanism,Coastal-atmospheric environment
The object of this study is a hot-dip Al coated steel bridge, which serviced over 25 years in a coastal atmospheric environment. In several structure components, the outmost Al layer has started to be dissolved. Three types of deteriorated hot-dip Al coating were discussed to clarify the corrosion progress and deterioration mechanism, according to corresponding SEM-EDS and EPMA element analysis.