As corrosion is defined as the degradation of metal whih is a chemical reaction occurs between metal surface and surrounding atmosphere. In the present work, an attempt has been made to find the corrosion rate of metals like Aluminium, Copper, Mild steel,which are analysed when it is exposed to 5% Sodium chloride (NaCl) solution where 1 cm 2 surface area exposed.The corrosion rate of metals under the influence of NaCl solution was generally analysed by Tafel Fit curve using EC Lab Software.Corrosion potential E corr and Current density I corr values are evaluated and compared for selected metals.