Reinforcement Bond In Concrete With Differet Types Of Bars And Corrosion Prevention By Using Epoxy Resin

Abstract

Corrosion is a spontaneous process of returning metals to their natural state by oxidation reduction reactions. Corrosion of metals results in a loss of both structural integrity and attractive appearance. Corrosion of reinforcing steel in concrete is one of the major causes for deterioration of bridges, buildings and other concrete structures.

Several parameters, oxygen, moisture content, and chloride concentration, will influence the development and rate of corrosion of reinforcing steel in concrete. It is known that corrosion will take place only if there is enough oxygen and water available at the bar depth for the corrosion process to occur. The presence of chloride ions will initiate the corrosion of steel in concrete and the rate of corrosion increases with increasing chloride concentration.

Epoxy resins-based organic coatings are extensively used as a long-lasting corrosion resistant coating because of their excellent electrochemical and mechanical properties. Most epoxy resins are complex molecules, and they can be successfully employed as hydrophobic corrosion resistant coatings in all types of corrosive electrolytes, including saline solutions. Consequently, their macromolecular structure offers large surface coverage leading to efficient anti-corrosion performance.