Detection and Impact of Chloride Ion Deposition Rate in the Atmosphere at the Coast of Hangzhou Bay

WANG Jianle; JIANG Dafei; LI Guojie; XU Qiang; ZHAO Guodong; ZHANG Ziwei; CHENG Wanli

doi:10.7643/ issn.1672-9242.2024.06.018

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Equipment Environmental Engineering ›› 2024, Vol. 21 ›› Issue (6) : 136-141. DOI: 10.7643/ issn.1672-9242.2024.06.018

Environmental Test and Observation

Detection and Impact of Chloride Ion Deposition Rate in the Atmosphere at the Coast of Hangzhou Bay

WANG Jianle¹, JIANG Dafei¹, LI Guojie¹, XU Qiang^2*, ZHAO Guodong¹, ZHANG Ziwei¹, CHENG Wanli¹

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Abstract

The work aims to investigate the corrosion level of construction facilities at the coast of Hangzhou Bay. Three coastal points were selected for one-year detection of the chloride ion deposition rate, and the effects of season, wind direction, orientation and rainfall on the deposition rate of chloride ions were analyzed. The average annual chloride deposition rate at the three detection points exceeded mg/(m²•d). Due to factors such as orientation and surrounding space, point B was most heavily affected by the atmosphere of the eastern ocean throughout the year, and the chloride ion deposition rate was the highest throughout the year. Among them, the chloride ion deposition rate in July was close to chloride deposition rate monitored 350 m away from the coastline in the Middle East of Hainan Province. Since the rainfall in June increased by 2.3 times compared to that in May, the chloride ion deposition rate at point B decreased by 51% in June compared to that in May. The chloride ion content in concrete of more than 15 years was generally high, showing typical marine corrosion characteristics. The atmosphere at the coast of Hangzhou Bay conforms to the characteristics of marine corrosion environment and is affected by factors such as season, wind direction, orientation, and rainfall.

Key words

chlorine ion deposition rate / coast of Hangzhou Bay / chloride ion content in concrete / wind direction / rainfall / marine corrosion

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WANG Jianle, JIANG Dafei, LI Guojie, XU Qiang, ZHAO Guodong, ZHANG Ziwei, CHENG Wanli. Detection and Impact of Chloride Ion Deposition Rate in the Atmosphere at the Coast of Hangzhou Bay[J]. Equipment Environmental Engineering. 2024, 21(6): 136-141 https://doi.org/10.7643/ issn.1672-9242.2024.06.018

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