(Žilinská univerzita v Žiline, 2023) Galčík, Marek; Brůna, Marek
Surface of aluminium alloy melt is covered by an oxide layer when it is in contact with the surrounding
atmosphere. When the oxide layer is retained on the surface of the melt it prevents the melt by hydrogen saturation.
The oxide layer is harmful when it is submerged into the melt. The work focuses on the influence of the melt
velocity on the bifilm formation, morphology of oxide layers and their influence on the porosity and filling the
mold cavity.
(University of Žilina, 2023) Galčík, Marek; Brůna, Marek; Medňanský, Martin
An oxide layer is formed on the surface of a molten aluminium alloy when it is exposed to the
surrounding atmosphere. The oxide layer on the surface of the melt is not harmful. The problem occurs when it is
entrained into the melt volume and solidifies in the casting. The paper deals with the formation of the oxide layer,
its types and the formation of a double oxide layers.
