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This paper aims to present a novel class of pipeline protective lining materials that provide erosion-corrosion resistance combined with negligible wear to spray equipment. These coatings have been formulated with a blend of thermoplastic fillers rather than the traditional ceramic fillers used for erosion resistance.
This paper aims to present a novel class of pipeline protective lining materials that provide erosion-corrosion resistance combined with negligible wear to spray equipment. These coatings have been formulated with a blend of thermoplastic fillers rather than the traditional ceramic fillers used for erosion resistance. The low temperature (LT) coating is recommended for ambient service conditions whilst the high temperature (HT) coating is recommended for operating conditions up to 200ºF. These coatings have been designed to facilitate spray applications in conjunction with robotic technology and are suitable for achieving higher build dry films in one coat without sagging. The use of spray-applied erosion resistant ceramic epoxy composite coatings to protect pipeline field joints may not be an option as these coatings cause extensive damage to spray equipment due to the hard angular nature of the ceramic filler employed. Application of such coatings by brush or roller will therefore restrict their use to man-entry pipelines. During comparison evaluation of erosion resistance LT and HT thermoplastic coatings exhibit performance characteristics that are superior to traditional ceramic epoxy composite coatings and demonstrate minimum damage to the spray equipment.
Key words: downloadable, liquid epoxy, pipeline coating, internal field joint, girth weld, erosion resistant, abrasion, impingement, wear, sprayable, spray friendly, ceramic filler, thermoplastic filler
Multi-layer polypropylene (MLPP) insulation coating is used for thermal insulation of subsea pipelines. However in recent years - with higher wellhead operating temperatures - high temperature (HT) Fusion Bonded Epoxies have been used. This paper describes the author's experience with the MLPP systems over the last 20 years.
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Corrosion protective coatings deteriorate for a number of reasons including insufficient surface preparation and deficient thickness. This paper discusses the mechanisms of failure and provides a technical overview regarding the deterioration aspects of coatings.
Self-healing coatings for corrosion protection refer to those with the ability to sense the corrosive environment and to release preloaded inhibitors from the coating matrix by a controlled mode. In this work, SiO2 nanoparticle based polyelectrolyte nanocontainers were fabricated by the LbL method to store corrosion inhibitor BTA.