The corrosion behaviour of Hadfield
manganese austenitic steel matrix composite reinforced with the varying amount
of TiC and unreinforced Hadfield manganese austenitic steel matrix alloy has
been evaluated in 3.5% NaCl aqueous solution with the pH value of 6 by the
potentiodynamic polarization curves and linear polarization resistance
measurements at a scan rate of 1 mV/s at room temperature (25°C ± 2°C). The
corrosion rate of the composites is higher than that of their unreinforced
matrix alloy and it increases with the increasing volume fraction of TiC. The
poor corrosion resistance of the composites can be attributed to the galvanic
effects between the matrix and reinforcement.
