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Abstract The problem of rapid metal dissolution and evolution of hydrogen (RDHE) of galvanized steel in fresh concrete have attracted attention recently. In this work, Cr-free oxidant M n O… Click to show full abstract
Abstract The problem of rapid metal dissolution and evolution of hydrogen (RDHE) of galvanized steel in fresh concrete have attracted attention recently. In this work, Cr-free oxidant M n O 4 - ion was introduced in simulated fresh concrete environment to inhibit RDHE of galvanized steel (GS). Results showed that M n O 4 - ion presented promising inhibition on both hydrogen evolution and anodic dissolution of GS. The presence of M n O 4 - ion significantly increased the corrosion potential of GS, and also caused the formation of (Mn, Ca)-containing protective film at corroding interface. This gave M n O 4 - ion high inhibition efficiency (>98%) on anodic dissolution and hydrogen evolution of GS.
Journal Title: Construction and Building Materials
Year Published: 2020
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