Corrosion behaviour of aluminium Al 6013-20 SiC(P) at controlled velocities and elevated temperatures

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 21 . 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.

Effect of phase transformation on corrosion behaviour of Zn–22Al alloys

“…Recently, more and more reports have focused on the influence of the heat treatments on the corrosion resistance of alloys. [22][23][24][25][26][27][28][29][30][31][32][33] In the family of Zn-Al alloys, many investigations have focused on the eutectoid Zn-22Al (wt-%) alloys owing to its superplastic behaviours. [34][35][36] The eutectoid phase transformation from suspensive Zn rich a 2 (fcc) phase to equilibrium Al rich a 1 phase and Zn rich g phase (Fig.…”