Significant reduction in corrosio n resistance by Nano-Structure Ni-Cr coating for Boilers Application

Abstract

The consequences of corrosion are many and effect of these on the safe, reliable and efficient operation of equipment or structure are often more serious. To avoid corrosion the current investigation is made and corrosion behavior of Nano Ni-Cr coating on (Fe-Mn0.48±0.05) was evaluated in tap water. A Nano structured Ni-Cr coating was prepared by Ball Milling Technique. The specimen with and without Nano Coating was exposed to Linear Polarization Resistance Test (LPR). The coating was found to reduce corrosion rate of 15x10-3 (mpy) of bare sample to 0.05439x10-3 (mpy) of Nano Ni-Cr coated sample. Corrosion Resistance shown by the investigated coating is due to Cr2O3 phase formed on coating thus the results are favorable for boiler applications.