COATINGS FOR METAL CASTING PARTS

摘要

The method is disclosed for coating or impregnating a metal tool with a meta l oxide to render the metal part more resistant to liquid metal attack or micr o- welds. The method includes the steps of applying a liquid metal carboxylate composition, or a solution thereof, to a substrate material, and exposing th e substrate to an environment that will cause vaporization or dissipation of a ny excess carboxylic acids in the liquid metal carboxylate composition while th e metal carboxylates are being converted to metal oxides.