In this book, two types of testing approaches have been made to determine the corrosion evaluation of various coating systems. These include polarization resistance (PR) and Tafel extrapolation tests. Mild steel showed considerable corrosion product formation at the solution-sample Interface in both the environment (Pitting Corrosion). As demonstrated High Build Epoxy performs excellently in all two corrosive environments. It has extremely low corrosion rates and high polarization resistance, should be an excellent and more economical material in the clad form. In the presence of 3.5% NaCl, Coal Tar Tape performs worse. This means that there is a greater chance of damage to Coal tar Tape Coated steel and has lower polarization resistance.The High Build Epoxy Coating shows superior corrosion resistance in both the corrosive environment where as coal Tar Tape shows worse when compare to all six different coating.