Abstract
The corrosion performance of both iron- and aluminium-based powder metals is reviewed and compared, where possible, to similar conventional alloys. Iron-based alloys produced from consolidated powder or compacted amorphous chips have generally been found to have improved corrosion resistance compared to their wrought counterparts, whereas sintered iron-based alloys generally exhibit poorer corrosion resistance. The corrosion performance of aluminium-based alloys produced from consolidated powder is frequently better than that of their conventional counterparts. Aluminium alloys are considered in four groups: AlZnMgCu, AlMg, AlLi and AlCu alloys. The current understanding of the corrosion behaviour of powder metals is assessed and suggestions are made for future investigations.
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