Corrosion Behavior of in-Situ AlB₂/Al-Cu Metal Matrix Composite

Abstract

The aim of this study was to fabricate 30 wt.% AlB2/Al-Cu composites using in-situ casting processes and to investigate the corrosion behavior of the composites and of the matrix material in various media. The electrochemical parameters were obtained from potentiodynamic polarization curves. The composites were prepared by liquid reaction of aluminum matrix with boron oxide at 1400• C. The results show that the corrosion resistance of the composite was higher than that of the matrix in selected corrosion media. The anodic corrosion current density values were decreased by reinforcing AlB2 particles.

Evaluation of Hardness and Corrossion Behaviour of Al 7075∕TiB2∕Cr2O3 Composite

“…Saravanan et al [17] reported that the addition of cenosphere will reduce corrossion rate for Alumnium 6063 metal matrix composites. Falcon et al [12] made a study that the presence of TiC particles in Mg-Aluminium alloy composites will increase the corrossion resistance. Elcicek et al [11] reported that addition of AlB 2 in Al-Cu alloy metal matrix will reduce the corrossion rate of the composites.…”