Effect of fluxing chemicals on the quality of the aluminum castings were fully assessed and discussed in this study. Six different fluxing chemicals classified into three groups (fluorides, chlorides and carbonates) were added to A356.2 and Al-Si melts. The fluxed melts were poured to get chill samples, reduced pressure test samples, boated mould castings and ASTM B108 mould castings. The quality of aluminum castings was evaluated by the oxide particles and oxide films (after ultrasonic vibration treatment) on polished surface of aluminum chill samples. The inclusion particles and oxide films (termed as foggy area of polished surface from aluminum chill samples) were statistically assessed by image analyzer. Effect of fluxing chemicals on the mechanical properties of fluxed casting was also investigated.
Fluorides Chlorides Carbonates Fluxing treatment Inclusion particle Oxide film Dry dross Wet dross