FIELD: metallurgy.
SUBSTANCE: moulding mixture contains quartz sand, a binder and a non-stick additive in the form of silicon carbide in an amount of 4% to 36% by weight with respect to the total weight of the moulding mixture. Silicon carbide is a powder or micropowder with an average particle size of less than the average particle size of the sand used in the moulding mixture. The moulding mixture may further comprise oleophilic bentonite in the form of a dry powder or in a swollen state in an amount of 0.5% to 12% by weight with respect to the total weight of the moulding mixture.
EFFECT: increase reliability of magnesium alloys protection against oxidation, cleanliness of castings surface.
3 cl, 2 tbl
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