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.
Corrosion tests have been carried out in dependence of important application parameters, applying electrochemical methods, beaker tests and long term tests in cooling circuit simulating devices. The results show excellent efficiency and significant synergies between the new substance and other inhibitors.
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.
The alloys (used in chem/process industries) are usually in the solution annealed condition & must be fast cooled from the annealing temperature to prevent the precipitation of third phases such as sigma chi nitrides & alpha prime. This paper describes a reactivation test to detect alpha prime - used with 22%Cr and 25% Cr alloys. Case studies.