Control of Corrosion on Underwater Piles: Seminar Report

Seminar Report on Control of Corrosion on Underwater Piles

Control of Corrosion on Underwater Piles

Abstract

Piles are structures used to transfer loads from the superstructure to the subsurface strata. When the subsurface stratum is water based or if we deal with a hydraulic structure, the piles are to be driven into water and underwater strata. Piles used in underwater structures are often subjected to corrosion. There is no absolute way to eliminate all corrosion, but corrosion protection measures are employed to control the effect of corrosion. Corrosion protection can be in different ways according to the environment and other factors. Forms of corrosion protection include the use of inhibitors, surface treatments, coatings and sealants, cathode protection and anode protection. The control measures explained in this are Protective coatings, cathode treatment, and application of Fibre Reinforced Polymer (FRP) Composites.

Content of the Seminar Report

  • Corrosion Mechanism of Steel in Sea Water
  • Zones of Corrosion of Steel Piles
  • Environments Conducive to Corrosion
  • Corrosion Management
  • Corrosion Protection Methods
  • Protective Coating
  • Different types of coatings used for underwater piles
  • A Typical Anode Delivery System
  • Composites and the Fight against Corrosion
  • Application of Fiber-reinforced polymers (FRP) Composites
  • Case Study for Application of FRP Composites

Conclusion

Though there is no absolute way to eliminate all corrosion on underwater piles, there are some effective measures to control them. Cathodic protection is found to be quite simple to employ and mostly used in marine conditions. The protective coatings are used in vast and expensive structures. The FRP composites have many advantages over conventional methods such that they are lightweight, possess high strength and chemical resistance and moreover have incomparable flexibility.
Of the various ways of wrapping of FRP composites, transverse wrapping is found to be the easiest as otherwise, the longitudinal pieces are awkward to handle and difficult to position. Bi-directional material is the best option. Scaffolding measures during the application of materials ensures safety and simplifies installation. Out of the two systems of FRP application, the pre-preg system is easier to use. On-site FRP saturation can be problematic. High winds and high tides should be avoided during the process.