Corrosion-resistant coated substrates.

摘要

The substrates, such as this interior surfaces of chimney liners, flue ducts and scrubbers, are rendered corrosion-resistant by application of a multilayer coating. The multi-layer coating comprises a primer layer of thermosetting polymer, an intermediate layer comprising a thermosetting polymer and siliceous filler, a further intermediate layer of a thermo-setting polymer and a non-siliceous filler, and an outer layer of a fluoroelastomer and a non-siliceous filler. The improvement over the multi-layer coating of European Patent Application Publication 10853 is in the further intermediate layer, which provides significantly enhanced chemical resistance and thermal stability.