Corrosion-wear simulation of automotive engine component materials under biodiesel

Abstract

Biodiesel has become increasingly common and significant alternative to traditional petroleum fuel in recent years. However, biodiesel has some adverse effects such as susceptible to corrosion, oxidation and mixed wear to the engine components materials. Therefore, in this study, wear simulation of automotive engine component materials was done using computational fluid dynamics approach to develop to predict wear and corrosion behaviour of engine components materials and develop wear mechanism map. A pin-on-disc configuration was considered as a simulation model of wear under biodiesel whereby load was applied from pin to disc during the simulation process and corrosion behaviour was simulated using boundary box whereby biodiesel entered from the inlet section of the boundary box and left the system from the outlet section using three different types of steel materials. The relationship between wear rate, applied load and sliding velocity were simulated and discussed followed by the development of wear mechanism map. The corrosive and abrasive wear mixture were dominated for carbon steel and low-alloy steel. Stainless steel showed better wear-resistant behavior than other materials under biodiesel exposure. The individual wear map generated for the individual material is also discussed in the context of the wear mechanisms observed under biodiesel contact.