TY - JOUR
T1 - Long-term deterioration mechanism of hot-dip aluminum coating exposed to a coastal-atmospheric environment
AU - Kainuma, Shigenobu
AU - Yang, Muye
AU - Gao, Yang
AU - Hashimoto, Mikio
N1 - Funding Information:
This research work was kindly supported in part by JSPS KAKENHI Grant Numbers JP19H02227 and JP19K15074 . We would like to thank UCHIDA Transport Co., Ltd. for the expert advices and valuable contribution to MSP exposure test, as well as Kosuke YAGI for his earnest work during his master course at Kyushu University.
Funding Information:
This research work was kindly supported in part by JSPS KAKENHI Grant Numbers JP19H02227 and JP19K15074. We would like to thank UCHIDA Transport Co. Ltd. for the expert advices and valuable contribution to MSP exposure test, as well as Kosuke YAGI for his earnest work during his master course at Kyushu University. All data included in this study are available upon request by contact with the corresponding author.
PY - 2021/4/19
Y1 - 2021/4/19
N2 - This study focused on the long-term corrosion mechanism of hot-dip aluminum (HDA) coating applied to a steel bridge exposed to a coastal-atmospheric environment. Aging HDA samples were taken from the actual bridge, and the corrosion product composition and morphology of the deterioration stages were investigated. The localized environmental assessment indicated that the surface orientation of the structural members led to a significant difference in salt accumulation and corrosion rate, with the most important influence being the rain-washing effect. Besides, open circuit potential, critical pitting potential, and aging sequence of different metallic phases were clarified. In addition, the long-term deterioration mechanism and pitting growth kinetics of aging HDA were speculated and verified with electrochemistry and elemental analysis.
AB - This study focused on the long-term corrosion mechanism of hot-dip aluminum (HDA) coating applied to a steel bridge exposed to a coastal-atmospheric environment. Aging HDA samples were taken from the actual bridge, and the corrosion product composition and morphology of the deterioration stages were investigated. The localized environmental assessment indicated that the surface orientation of the structural members led to a significant difference in salt accumulation and corrosion rate, with the most important influence being the rain-washing effect. Besides, open circuit potential, critical pitting potential, and aging sequence of different metallic phases were clarified. In addition, the long-term deterioration mechanism and pitting growth kinetics of aging HDA were speculated and verified with electrochemistry and elemental analysis.
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U2 - 10.1016/j.conbuildmat.2021.122516
DO - 10.1016/j.conbuildmat.2021.122516
M3 - Article
AN - SCOPUS:85100683760
SN - 0950-0618
VL - 280
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 122516
ER -