- June 2010
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This paper compares wrought aluminium with PM aluminum and PM aluminium alloys with boron-base additions, containing boron carbide and Fe/B (obtained by mechanical alloying during 36 hours from a Fe-B 50% mixture
by weight). The effect of sintering temperature for the Fe/B containing
material and the effect of mechanical alloying for the boron carbide
containing aluminium alloy on the corrosion resistance of those
materials have been studied. Their behavior is followed through cyclic
anodic polarization curves in chloride media. In the Al+20%Fe/B
composite, low sintering temperatures (650-950ºC) exert a negative
effect. However, when the material was sintered at high temperature
(1000-1100ºC) its behaviour was very similar to the PM pure aluminium.
The effect of mechanical alloying studied in aluminium with boron
carbide was also important in corrosion resistance, finding a lower
corrosion rate in the mechanically alloyed material.