ABSTRACT
This chapter discusses the corrosion behavior of the coated manifolds evaluated using the weight reduction method and Tafel exploration. The corrosion resistance of the coated samples was also monitored through corrosion density and corrosion potential of the uncoated and coated samples against corrosive environment. The corrosion behavior of the uncoated and coated samples was studied into two different methodologies: One is the weight reduction method and another one is the polarization technique. Hardness is directly proportional to the refinement of microstructure; it reflects the good bonding between the coating surfaces. The ability of iron materials has led to excessive corrosion, and hence, it attacked the cast iron very violently. Vickers' hardness was determined on the cross section of the uncoated and Ni- and Cr-electroplated cast iron samples which shows a significant increase in microhardness of 246 and 259 HV, respectively.
