Corrosion Behaviour of Al 7075/Al2O3/SiC MMNCs by Weight Loss Method

Abstract

Aluminium-based metal matrix nanocomposites (MMNCs) are a variety of brand-new designed items. They serve a broad range of applications in the automobile, aerospace, biotechnology, electronic and defence markets. MMNCs are included in non-aluminium matrices such as nano-Al2O3 (20–30 nm), Nano-SiC (50 nm), etc., which provide beneficial architectural features for base metal (AL) alloys. These include improved dimensional stability, creep resistance, abrasion resistance, and also excellent heat capacity. The present paper is a study on the corrosion characteristics of a MMNC and an unreinforced alloy (Al 7075). MMNCs have been used with nano-silicon carbide (SiC) and nano-aluminium oxide (Al2O3). The Al 7075 series alloy is used to develop a composite with different portions of SiC (1.0, 2.0, 3.0, and 4.0%), and a hybrid composite with an equivalent quantity of Al2O3 and SiC has been prepared by a liquid phase technique using a stir-casting method. In the present work, the weight-loss approach has been carried out by immersing the sample for 96 h in various corrosion media, such as sulfuric acid (H2SO4), hydrochloric acid (HCl), and 3.5% sodium chloride (Nacl). The results recommend that hybrid demonstrates extra resistance to corrosion.