Corrosion Behaviors of Copper, Aluminium and Stainless Steel 316l in Chicken Fat Oil Biodiesel-Diesel Blends

Automotive engines are made from different materials like steel, aluminium, copper, and brass. These materials usually come in contact with the fuel. This study provides corrosion rates of automotive materials copper, aluminium, and stainless steel 316l when coming in contact with chicken fat oil-based biodiesel blended with pure diesel using Response Surface Methodology (RSM). As suggested by RSM, the experiments were performed for different durations and at different blends of biodiesel with diesel. Copper, aluminium and stainless steel 316l showed minimum corrosion rate at 5.86% blend and maximum corrosion rate at 34.14% blend when these were immersed for 920 hours. Optimum values suggested by RSM for copper and aluminium were at 10% blend and 720 hours while for stainless steel 316l, these were at 10.91% blend and 754.44 hours. Another experiment for the B100 blend for 920 hours was performed for copper, aluminium and stainless steel 316l and the obtained corrosion rates were more than the previously obtained corrosion rates. The surface morphology of the materials was checked by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) and it was found that copper is the most corrosive material in chicken fat oil-based biodiesel followed by aluminium and stainless steel 316l.