PIPE INTERIOR COATINGS

摘要

Pipe useful for downhole and transport of hydrocarbon fuel such as oil and/or natural gas is provided that has a non-stick coating adhered to the pipe interior surface, said coating being at least about 50 µm thick and comprising at least two layers constituting an inner layer and an outer layer adhered to one another, each said layers containing polymer binder and f luoropolymer and being at least about 15 µm thick, the weight proportion of said polymer binder to said fluoropolymer in said inner layer and in said outer layer being effective to maintain adhesion between said layers during pressurization and decompression upon said non-stick coating being exposed to the Autoclave Test and the proportion of said fluoropolymer in said inner layer and said outer layer being effective to protect said interior surface during exposure of said non-stick coating to the Acid Soak Test.