Deterioration and anti-corrosion behaviors of overlapped layer between al-5mg alloy thermal spray coating and heavy-duty paint coating in highly corrosive atmospheric environment

Shigenobu Kainuma, Muye Yang, Haoxuan Yang, Kazuyoshi Muto, Hirokazu Miyata

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

Recently, in Japan, Al-5Mg alloy thermal spray coating was applied as a repair method to improve the anticorrosion performance of painted steel bridges in a highly corrosive environment with chloride in various aspects such as girder ends, bearing supports, and bolted joints. However, the deterioration behavior of the overlapped layer between Al- 5Mg alloy thermal spray coating and heavy-duty paint coating in an atmospheric environment was not clarified in previous studies. In this study, atmospheric exposure tests were performed in highly corrosive atmospheric environments with and without the influence of rainfall washing-off on adhered airborne sea salt to examine the deterioration and anti-corrosion behavior. The exposure sites are located near the coastline. The test specimens were common carbon steel plates with an overlapped layer between the Al-5Mg alloy thermal spray coating and heavy-duty paint coating. To evaluate the effective area of the sacrificial anode reaction by thermal spray coating, a ribbon defect with a width of 12 mm was introduced in the overlapped layer. From the test results, the overlapped layer was deteriorated from the lower part of the thermal spray coating along with the defects in a corrosive environment without the effect of rainfall washing-off. The deterioration of the thermal spray coating layer was accelerated by the sealing treatment of the thermal spray coating layer.

本文言語英語
ホスト出版物のタイトルFracture and Damage Mechanics
ホスト出版物のサブタイトルTheory, Simulation and Experiment
編集者Luis Rodriguez-Tembleque, Ferri M. H. Aliabadi
出版社American Institute of Physics Inc.
ISBN(電子版)9780735440456
DOI
出版ステータス出版済み - 11月 26 2020
イベント19th International Conference on Fracture and Damage Mechanics, FDM 2020 - Mallorca, スペイン
継続期間: 9月 15 20209月 17 2020

出版物シリーズ

名前AIP Conference Proceedings
2309
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

会議

会議19th International Conference on Fracture and Damage Mechanics, FDM 2020
国/地域スペイン
CityMallorca
Period9/15/209/17/20

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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