A REVIEW ON CORROSION: CAUSES AND PREVENTION

The reinforcing steel corrosion in concrete structures has undoubtedly become a serious threat to structure designers. Furthermore, it has become economic burden to many government agencies as lot of public funds are wasted due to this corrosion. From the literature present, we know that the iron in the steel has natural tendency to revert eventually to its most stable oxide state, so once initiated, it becomes difficult to completely aband on the corrosion .The adaptation of corrosion protection measures in new construction such as use of good design and construction practices, adequate concrete cover depth, low permeable concrete and coated reinforcing steel, use of polozonic materials such as fly ash in concrete and coated reinforcing steel helps in prevention of steel reinforcing corrosion to great extend.