2025 Volume 81 Issue 3 Article ID: 24-00235
In this study, a full-scale specimen made of reinforced concrete with a part of the specimen periodically sprayed with salt water was subjected to a corrosion investigation, assuming that the structure is supplied with anti-freezing agent by leakage water. From the results of the corrosion investigation, it was confirmed that the corrosion condition was not uniform even within the area where the salt water was sprayed and that steel corrosion occurred even outside the area where the salt water was sprayed. Localized corrosion was found to have a pH 2-3, suggesting crevice corrosion. On the other hand, Green Rust was observed at several locations, suggesting that steel corrosion in concrete is not normally expected to occur in wet environment. The reason for the non-uniformity of steel corrosion is not only the crevice structure between the steel and the black skin, which has been pointed out in previous studies, but also the crevice structure due to bleeding between the steel and the concrete.
