Abstract Corrosion is one of the significant problems in the marine environment which ultimately leads to structural failure and economic losses. Condition assessment of the concrete piles is an essential part of the corrosion preventive measures in the marine environment. This research identifies the corrosion potential values in concrete marine piles using Half-Cell potentiometer. Followed by this, the observed potential values are undergone RSM Modelling. Around ten piles were chosen in the Chennai Fishing Harbor and the corrosion potential values along the depth of piles in three different zones namely atmospheric, splash and submerged zones at every three months interval were measured. Based on the visual inspection the piles are damaged more and minor cracks were developed on the surfaces of the concrete due to the dynamic impact of wave action specifically in the splash zone. From the results obtained in the field for the chosen piles in the fishing harbor, the corrosion potential values are in the range of -361.45mV to -527.57mV in the atmospheric zone, - 520.67mV to -784.85mV in the splash zone and– 401.23mV to – 631.28mV in the submerged zone. RSM was noted to be the most accurate predictor with the highest R2 and least errors.RSM model captured the data's variability the decent R2 threshold confirming- (R2 > 0.9855). The splash zones have higher corrosion potential values and are more prone to corrosion than the other zones.