The effect of addition of Sodium Chloride(NaCl)in increasing degasser efficiency on Al-Sil2% casting has been carried out.Al-Si 12% casting product mechanical properties are a very important parameter that indicates the quality of the casting product.However,it is a very common phenomenon that the properties of the casting product was reduced by gas porosity defects,which is formed due to high solubility of H2 at melt temperature of Al-Si 12%.In this investigation,we used NaF and NaNO3 as degasser with the addition of NaCl in the casting process.The addition of NaCl was variated to see the capability of NaCl as a degasser.The casting process were conducted at melting temperature of 800 °C and pouring temperature of 690 °C.The mechanical properties between casting products that use NaF-NaNC>3 degasser with variated ratio of NaCl addition were measured and compared.The result shows that mechanical properties of Al-Sil2 cast product in this research will be decreased along with increasing number of NaCl addition ratio in degasser composition.
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