Maximizing the Performance of Liquid-Applied Epoxy Pipeline Coatings by Optimizing Controllable Parameters. Part 2: Coating Application

Abstract In North America, 100% solids, two-part liquid epoxy coatings have been utilized extensively by the pipeline industry for decades, serving as the primary barrier against corrosion at girth welds, tie-ins during new construction, and in pipeline rehabilitation for maintenance purposes. This paper focuses on optimizing controllable parameters for coating applications to maximize the performance of liquid epoxy coatings. As the second part of a correlated series, it builds upon the foundation established in the preceding paper, emphasizing the critical role of coating application in ensuring the long-term effectiveness of protective coatings. Specifically, the effects of coating thicknesses, different application and cure temperatures, and various application methods on coating performance are investigated. Experimental data from tests conducted on two representative liquid-applied epoxy coatings across various coating thickness ranges, and application and cure temperatures are analyzed. Additional interests in the effect of coating thickness on coating performance at varying levels of soluble salt contamination are also explored. This paper offers valuable insights into optimizing coating application parameters for enhanced performance of liquid epoxy coatings and the feasibility of their controllability in the field.