Corrosion resistance of mild steel in simulated concrete pore solution (SCPS) in presence of simulated urine (SU), tartaric acid and lactic acid has been evaluated by electrochemical studies such as polarization study and AC impedance spectra. These studies lead to the conclusion that, the corrosion resistance of mild steel in various test solutions is as follows. Lactic acid+ SCPS+ urine > tartaric acid+ SCPS+ urine > SCPS > SCPS+ urine > urine. This leads to the conclusion that urination on the concrete structures such as bridges and building should be discouraged. Otherwise, the structure may collapse one day without prior information. However, the inclusion of tartaric acid or better lactic acid during the preparation of concrete admixtures strengthens the structures and should be encouraged