Long-term deterioration mechanism of hot-dip aluminum coating exposed to a coastal-atmospheric environment

Shigenobu Kainuma, Muye Yang, Yang Gao, Mikio Hashimoto

研究成果: Contribution to journalArticle査読

抄録

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.

本文言語英語
論文番号122516
ジャーナルConstruction and Building Materials
280
DOI
出版ステータス出版済み - 4 19 2021

All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 建築および建設
  • 材料科学(全般)

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