Three-Dimensional Spatial Distribution of the Sedimentation Rate of Chloride Ions on a Tropical Island.

Chlorine ions in the air are a key factor in the corrosion of offshore buildings. Mastering the distribution law of the chloride ion settlement rate ( R C l − ) in three-dimensional (3D) spatiality is helpful in protecting offshore buildings. The self-designed "kite-hanging wet candle method" was used to collect chloride ions in the air, using ion chromatography to analyze the chloride ion concentration of the sample solution, and obtained the annual R C l − in the offshore atmosphere at different vertical heights, using the Pearson correlation coefficient method to analyze the influence of environmental factors on the R C l − . The results show that the R C l − has a significant linear relationship with temperature, relative humidity and wind speed. Among them, the R C l − is positively correlated with temperature and negatively correlated with wind speed and relative humidity. In the vertical height range of 10–100 m, the R C l − presents a " ⊂ "-shaped distribution. In the range of 10–30 m, the R C l − is mainly controlled by the impact of ocean spray; in the range of 30–80 m, the R C l − is mainly controlled by marine aerosols; and in the range of 80 m–100 m, the R C l − is mainly controlled by marine aerosols and wind speed. Under the influence of wind direction and wind speed, the R C l − of the windward side is higher than that of the leeward side at different monitoring points, which are close to the coastline and at a low vertical height. Studying the distribution of the R C l − in 3D spatiality can effectively prevent and reduce its impact on offshore buildings. [ABSTRACT FROM AUTHOR]