Microstructure and Corrosion Characteristics of In Situ Aluminum Diboride Metal Matrix Composites

The present work relates to the preparation of Al–AlB 2 in situ composite and investigates the characteristics of corrosion of in situ composites in sodium chloride media. Composites containing matrix alloy, XAlB 2 (X—1, 3, and 5 wt%), were prepared by an in situ technique involving the chemical reaction between base matrix and halide salt KBF 4 . To know about the uniform distribution of AlB 2 dispersoid in the Al6061 base matrix, microstructural characterization was carried out using SEM. Potentiodynamic Tafel polarization curves have fetched some of the electrochemical parameters. Outcome of the research concludes that higher corrosion resistance was offered by composites compared to base matrix in the selected corrosion media.