The durability of reinforced cement concrete (RCC) structures is largely affected by corrosion of the steel reinforcements. The presence of free chloride ions further enhances the process of corrosion resulting is drastic deterioration of the structure. One of the several available methods to mitigate corrosion is the sacrificial or cathodic protection. This research work deals with the experimental investigation of RCC slabs subjected to chloride ingress and cathodically protected using AZ91D. The experimental investigation involved casting two sets of six slabs 1.0 m X 1.0 m X 0.10 m using steel reinforcement mat of 10 mm diameter and a centrally placed 22 mm diameter and 250 mm long AZ91D anode. One set of three slabs was casted as reference slab while the other set contained 3.5% NaCl by weight of cement. Half-cell potential (HCP) readings were taken at regular interval of 10 cm throughout the slab for 270 days to monitor the electrochemical potential. The average values for each day and set of slabs were used for making inferences. In both instances, the negative electrochemical potential increased towards the centre, i.e. the anode, corroborating the movement of chloride ions towards the anode. In addition, as the duration of sacrificial anodization increased, a significant decrease in negative potential was observed in the slabs.