B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
117/142
B32B 15/08 (2006.01) B05D 5/00 (2006.01) B32B 13/12 (2006.01) F16L 58/10 (2006.01)
Patent
CA 1174534
CORROSION RESISTANT COATED ARTICLES WHICH INCLUDE AN INTERMEDIATE COATING LAYER OF A THERMOSETTING POLYMER AND NON-SILICEOUS FILLER ABSTRACT OF THE DISCLOSURE 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 multi- layered 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 thermo- setting 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 fluoroelasto- meric 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.
378247
Semanisin Dale J.
Slama William R.
Washburn Robert B.
Borden Ladner Gervais Llp
General Signal Corporation
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