FIELD: foundry.
SUBSTANCE: invention relates to foundry. First material is poured into a flask to make the valve body. In the casting process, a layer of a second material having a higher corrosion resistance than the first material is formed on one or more inner surfaces of the valve body casting by applying the second material using additive technology to one or more outer surfaces of the core and inserting the core into a flask. A portion of the first material bonds to the second material on one or more outer surfaces of the core while the first material is poured into the flask.
EFFECT: provides a corrosion-resistant coating on the inner surface of a complex profile.
14 cl, 2 dwg
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