Influence of Partial Rust Layer on the Passivation and Chloride-Induced Corrosion of Q235b Steel in the Carbonated Simulated Concrete Pore Solution

A partial pre-rusted wire beam electrode (WBE) was designed to study the influence of rust layer on rebar corrosion in carbonated simulated concrete pore solution (SCPS). The results show that passive film generated steel area is more fragile than formed fine polished carbonaceous media. Nevertheless, pitting resulting from presence chloride ions still tends occur surface due local acidification process being hindered by layer. could play a important role inhibiting initiation chloride-induced rebar. expansion path product would be blocked layer, leading pit propagating region. Furthermore, growth greatly accelerated catalytic cathodic reaction