Failure Analysis of Heat Exchanger Tube Due to Corrosion

In order to “Investigate the failure of Heat Exchanger material due to corrosion, fundamental corrosion factor has been studied. This material has been diffused probably affected as corrosion. This research report presents the result of an investigation of the corrosion failure and discusses the corrosion parameters of three materials such as Mild steel, Aluminum alloy and stainless steel by making calculation of corrosion rate inside the laboratory. The Tafel extrapolation method of galvanic corrosion measurement is used for the galvanic current of similar or dissimilar material. In galvanic couple the results obtained by using Gamry software. The specimen immersed in 5% Nacl2 solution for obtaining good result of corrosion rate and these specimens tested inside laboratory from college of engineering Pune. This process much more sensitive and faster than more traditional method for measuring corrosion rate such as weight loss. Result shows that the material of 304 stainless steel has higher corrosion resistance as compare to Aluminum alloy and Mild steel. It is prove with graphically and mathematical calculation. The aim of this research project is to suggest the best material to Heat Exchanger of Dairy plant. Which has higher corrosion resistance? Finally it was found that, the basic principal to calculate corrosion rate, depends upon the Faraday's law. It states that “The tendency of each material when dipped inside electrolyte solution ( 5% of Nacl2 ). There is evolution of atoms. “Hence the rate of evolution of atoms at anode side is nothing but rate of corrosion and these calculated by using Gamry Software