抄録
It is important to estimate the salt adhesion on the steel surface for maintenance of the steel bridges. However, it is not obvious that relationship between atmospheric salinity concentration and salt adhesion. If the relationship between the two become clear, it is very useful for maintenance and management. In this study, estimate the adhered salinity ratio on the steel surface based on measuring atmospheric salinity concentration. From the result, adhered salinity ratio is about 7% and salt adhesion is different in the part of the steel plate.