For the assessment of the condition of a large structure suffering reinforcement corrosion, it is necessary first to have a strategy for the inspection for collecting the appropriate parameters for appraisal of its present condition and the prediction of its residual life. In present communication very briefly the procedure followed for identifying the corroding zones of a football stadium will be described and how the efficacy of corrosion inhibitors has been evaluated for their repair. In each selected zone the corrosion rate was measured through the Polarization Resistance technique using a modulated confinement to delimit the polarized area.