This paper deals with the weight loss corrosion characterization of red mud particulate reinforced Al-6061 alloy metal matrix composites (MMCs). Presently, very little research is done to study the environmental behaviour of these alloys. Al-6061 alloys have a relative high strength compared with zinc or aluminium alloys with a moderate melting point. Hence it was used as the matrix alloy in the present research. Red mud being a waste obtained after the extraction of aluminium from its ore it remains inert and is hardly affected by the acidic medium. Red mud particles of size 50-80 microns are used as reinforcement. Experiments were conducted to determine the corrosion rate of the samples in acid. MMC's are prepared according to ASTM standards by liquid melt metallurgy technique using vortex method. Composites containing 2, 4, 6% by weight of red mud and unreinforced matrix were tested using 1 N hydrochloric acid and at room temperature. Specimens are taken in the form of 20mm x 20mm cylinders. The composite was found to be more corrosive resistant than matrix alloy. In each test the corrosion resistance of both alloy composites was found to decrease with the exposure time. The decrease in the corrosion rates of composites when compared to that of matrix alloy is due to the physical barrier created by red mud particles.