This research deals with the effect of corrosion on reinforced concrete structures. In particular, it focuses on the consequences of bond strength deterioration. In a previous study (De Gaetano, 2019) the seismic capacity of a bridge pier subjected to corrosion was evaluated in time domain, considering the steel reinforcement cross-section reduction effect only. The aim of the present study is to deepen the previous investigation considering also the problem of loss of adherence between steel and concrete. Indeed, the analyzed structure is the same, so that a coherent comparison of the former results is possible. Furthermore, it is possible to assess to what extent the loss of bond can affect the bridge's strength and ductility.