2011 Volume 60 Issue 12 Pages 524-527
Atmospheric corrosion of the steel surface of a bridge is largely due to salt spays generated over the ocean and transported around the bridge. The observed data indicate that the salt sprays first adhere to the steel, after which the extent of Cl− on the steel surface increases; however, the mechanism by which these processes occur has not yet been investigated.
Our research objectives are to examine the relationship of atmospheric Cl− concentration with the extent of Cl− adhering to the steel surface and to clarify the effect of surface winds on the extent of Cl− adhesion.
The results show that the extent of Cl− adhesion is positively correlated with atmospheric Cl− concentration and that the extent of Cl− adhesion depends on surface winds. Therefore, when estimating Cl− on a steel surface, we must consider the atmospheric Cl− concentration and the surface winds.
