FP-based formulations as protective coatings in oil/gas pipelines

Corrosion in the interior of pipelines is a major and costly problem encountered in the oil and gas industry. In this context, a fluoropolymer and a hybrid epoxy/fluoropolymer resin were studied for their potential use to prevent corrosion. The fluoropolymer coating required the use of a primer layer. The coatings were formulated to maintain the excellent abrasion and chemical resistance properties of fluoropolymers, while enhancing adhesion to the substrates. Standard corrosion experiments, including chemical immersion, adhesion, and salt fog tests, were used for preliminary evaluation. Coatings were characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy before and after exposure to corrosive environments. Electrochemical properties were studied with electrochemical impedance spectroscopy, by monitoring the resistance and capacitance of the coatings over time. The results obtained in this work will fill a knowledge gap and will aid in the selection of the proper composition and thickness of anticorrosion coatings for use in a highly corrosive media.