Abstract
The corrosion behaviour of aluminium alloy 6013-20 SiC(P) at controlled velocities and elevated temperatures was investigated by electrochemical studies. The alloy in temper T4 (solution treated, quenched and naturally aged) showed a higher resistance to corrosion compared to the annealed and as fabricated tempers. It exhibited a decreased resistance to corrosion in 3·5 wt-% NaCl solution containing suspended polystyrene particles at solution velocities 1–3 m s–1. No significant reduction in corrosion resistance was observed in environmental chamber studies. Alloy Al 6013-20 SiC(P) offered good resistance to corrosion in salt spray chamber. The secondary phase intermetallic precipitates were the preferred sites for localised corrosion.
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