Estimation of concentration of air borne sea salt particles for corrosion prevention of infrastructures

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560579
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: OBATA Makoto 名古屋工業大学, 工学(系)研究科(研究院), 教授 (30194624)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 腐食環境 / 浮遊塩分濃度 / 気象解析

Outline of Final Research Achievements

Prevention of corrosion of steel structure is currently based on distance from the nearest coast. Concentration of airborne sea salt particles is overly simplified there. However, corrosion of structures is highly localized and authors have suggested importance to predict critical corrosive prone part using a proper CFD analyses. In such a CFD analysis, concentration of airborne sea salt particles is more important than usual quantities like by a dry gauze. The objective of this project is to establish a numerical method to estimate concentration of airborne sea salt particles at arbitrary location and time using a meteorological analysis. The accuracy of the analysis is verified by a year-long observation by a volume sampler. In the meantime, a relation between the results of a volume sampler and a dry gauze is also found. Captive ratio of sea salt particles barely depends on wind velocity.

Free Research Field

構造工学，維持管理工学