The key problem which has stemmed from our present pecuniary explanation of the use of steel piles in all of the waterfront terminuses and in and on sea structures like oil rigs, columns for bridges etc. is the corrosion of the piles in sea water. Timber piling has its insect problem, and steel has the corrosion problem. But due to greater strength and durability steel is mostly selected. Steel being an alloy having most of its content as iron, it is prone to rust and corrosion and as the sea water is salty in nature the rate of corrosion increases and so regular maintenance cost increases. In the following paper, we will be discussing Piles in sea and corrosion, acting on it with a case study.