초록 ▼

A concrete or metal substrate which is normally subject to deterioration in the presence of corrosive substances such as strong acids, particularly sulfuric acid, is rendered corrosion resistant when covered with the improved multilayered coating of this invention. In particular, a coated article, s

A concrete or metal substrate which is normally subject to deterioration in the presence of corrosive substances such as strong acids, particularly sulfuric acid, is rendered corrosion resistant when covered with the improved multilayered coating of this invention. In particular, a coated article, such as a coated chimney liner or flue duct, which includes a substrate, a primer coating layer of a thermosetting polymer, one or more inner coating layers of a thermosetting polymer which includes a siliceous filler, an intermediate coating layer of a thermosetting polymer which includes a non-siliceous filler, and a fluoroelastomeric top coating layer which includes a non-siliceous filler, has improved resistance to the corrosive effects of strong acids. Chimney liners, flue ducts, scrubbers, and the like which have been coated in accordance with this invention are useful in power plants, smelters, and other industrial settings where corrosive environments are present.

대표청구항 ▼

A coated article resistant to corrosion or deterioration which comprises: a substrate; a primer coating layer in contact with the surface of said substrate, said primer coating layer being a thermosetting polymeric material and having a thickness from about 1 to about 5 mils; an inner coating layer

A coated article resistant to corrosion or deterioration which comprises: a substrate; a primer coating layer in contact with the surface of said substrate, said primer coating layer being a thermosetting polymeric material and having a thickness from about 1 to about 5 mils; an inner coating layer in bonded contact with said primer coating layer, said inner coating layer being an admixture of a thermosetting polymeric material and a siliceous filler material and having a thickness from about 20 to about 80 mils; an intermediate coating layer in bonded contact with said inner coating layer, said intermediate coating layer being an admixture of a thermosetting polymeric material and a non-siliceous filler material and having a thickness from about 10 to about 15 mils; and an outer coating layer in chemically bonded contact with said intermediate coating layer, said outer coating layer being an admixture of a fluoroelastomer and a non-siliceous filler material and having a thickness from about 10 to about 50 mils.