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This study was to 1) develop a protocol to test coating performance on pitted stainless steel 2) compare performance of protective coating systems 3) determine application procedure.
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Jerrycans made of a high density polyethylene (HDPE) were filled with E85 and biodiesel and then exposed to temperatures of 20 °C (68°F) and 40 °C(104°F) for 5 years to study the interaction between HDPE and permeation barriers.
A test protocol was developed to provide an assessment of the effects of various film defects as well as to perform post-exposure qualitative and quantitative evaluations on eight different coatings systems.
Due to its success in the ductile iron wastewater pipe market, ceramic epoxy coatings are being increasingly specified and successfully applied on nearly every substrate used for immersion service in both the water & wastewater industry. Some unique characteristics set these epoxy coatings apart from their traditional counterparts. For instance, ceramic epoxy systems provide high-film builds, eliminate undercutting, minimize permeability, provide superior edge retention and form a non-ablative film.
Environments in oil and gas industries are often characterized by high temperature and pressure, harsh chemicals, humidity, extreme stress cycles, radiation, and mechanical disturbances.1,2 These extreme conditions degrade the ability of materials to perform, thus requiring enhanced protection through application of heavy-duty anti-corrosive and chemical resistant coatings that can withstand the aggressive environment.
Over the last few years, the protective coatings industry has seen an increased demand for high performance waterborne coatings in the field of corrosion protection. Market drivers such as “Sustainability”, “Greenability”, and ongoing regulatory and environmental concerns continue to force coatings producers to look for other viable options to replace conventional solvent borne technologies.
Often coatings are judged by certain criteria especially when it comes to immersion service. One of the criteria used to evaluate these coatings is permeability, which is often misunderstood. With 2 ASTM test methods, each with multiple methods and ways to report the results, you may get so much conflicting information that none of the information permeates into your brain in an understandable way.