Effect of Red Mud Reinforcement on the Corrosion Resistance of Aluminium 6061 Metal Matrix Composites in Sea Water | Chapter 6 | Chemical and Materials Sciences: Research Findings Vol. 4

 

Corrosion can affect the metal matrix composite in a variety of ways, which depend on its nature and the environmental conditions prevailing. The red mud content in aluminium 6061 alloy plays a significant role in the corrosion resistance of the material. A lot of research has been done on corrosion characteristics of particulate reinforced metal matrix composites, but no concrete investigation has been made on red mud particulate reinforced with aluminium alloy 6061 metal matrix composites. The present investigation aims to evaluate the corrosion properties of red mud particulate reinforced aluminium 6061 metal matrix composites. Red mud particulates reinforced varying from two to six per cent by weight in steps of two per cent under dry conditions. Composites are prepared by liquid melt metallurgy techniques using the vortex method. Castings are cut, turned and shaped into the required size to prepare the specimens for evaluation of the corrosion properties. Corrosion tests were conducted at room temperature (230 °C) using the conventional weight loss method according to ASTM G69-80. The corrodent used for the tests was Arabian Sea water collected from Malpe beach, Udupi District, Karnataka. Weighed specimens dipped in seawater. Specimens were taken out at every 24 hours intervals up to 96 hours. Four specimens for each condition and time were immersed in the corrosive solutions. In all 16 specimens of matrix and composites were immersed in the corrodent. Corrosion rates were calculated using the formula 534DAT/W. In each case, the corrosion rate in seawater decreases with an increase in exposure time for matrix and metal matrix composites due to passivation induced by aluminium. Therefore, incorporating red mud particulates in Aluminium alloy 6061 enhances corrosion resistance, making it a more effective material for marine and other corrosive environments.

 

Author(s) Details

 

P.V. Krupakara
Department of Chemistry, Adrsha Institute of Technology, Bangalore, India.

 

H.R. Ravikumar
Department of Chemistry, M.S. Engineering College, Bangalore, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsrf/v4/4694