The effect of casting quality on corrosion properties of Al-Si alloys used in automotive industry

The use of aluminium casting alloys has been increasing in recent years mainly due to their low density, good castability, high specific strength and corrosion resistance. However, to improve casting properties and obtain parts with the lowest possible defect content, foundries need a higher alloying element content, thus further improving the corrosion resistance of aluminium castings. Consequently, a better understanding of the corrosion resistance and protection of aluminium castings is required for these improvements to be successfully demonstrated. The demand for lighter weight reduced thickness and higher strength has become a focus in the automotive industry. In order to meet these requirements, the addition of alloying elements has begun to be investigated by taking advantage of the effect of solution strengthening. In this study, the effects of strontium, boron and vanadium additions on the mechanical and corrosion properties of A360 alloy, which is widely used in the automotive industry, were investigated. The mechanical properties and corrosion resistance of A360 casting alloys are emphasized.