corrosion characteristics of ZA-27/glass-fibre composites

Abstract

This paper evaluates the corrosion characteristics of short-glass-fibre-reinforced ZA-27 alloy composites. The unreinforced matrix, as well as the composites containing 1, 3 and 5% by weight of glass fibres, were tested. The composites were fabricated by the compocasting technique. The specimens were tested in both ascast and heat-treated conditions. The corrodent used was 1 N hydrochloric acid. As the glass fibre content was increased, the composite was seen to become more resistant to corrosion. Heat treatment at 320°C for a few hours also enhanced the corrosion resistance of the composites as well as of the unreinforced matrix material. An attempt is made to explain these phenomena. © 1997 Elsevier Science Ltd.