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Due to their excellent performance properties, epoxy coatings are commonly used over metal and concrete substrates in applications where corrosion protection and chemical/solvent resistance are key requirements. One weakness of these epoxy coatings is their poor UV durability. Epoxy coatings typically have poor gloss and color retention as well as poor resistance to chalking on exterior exposure.
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Tank lining products are necessary for protection of infrastructure and commodities to ensure daily business operations continue smoothly. They are expected to protect the tank from corrosion and chemical attack while maintaining the purity of the tank’s contents; ultimately keeping people and the environment safe from an accidental discharge. Rigorous laboratory testing programs and field trials are conducted to instill confidence the right product is recommended for each task.
Protective organic coatings are the primary form of corrosion control for steel structures exposed in a marine environment. For more than fifty years, testing of coatings suitable for various service environments has relied substantially on exposure of coated steel panels of different configurations followed by evaluation via visual inspection. Exposure may include accelerated testing or natural environmental exposure in immersion or atmospheric conditions.
This paper will cover cathodic disbondment, dry film thickness, peak height and coating evaluation for failures.
This research is specific to the following: Automated and batch powder coat systems using corona charging application guns, Ferrous and Non-Ferrous Metal Substrates, Formed Sheet Metal, Structural Shapes and Weldments, OEM facilities with in-house powder coating systems, Tier One Suppliers and Tier Two Suppliers.
JPCL is the journal of record for the protective coatings industry and the official voice of SSPC: The Society for Protective Coatings.
Corrosion and cavitation erosion on steel structures are problems and can have a huge impact on safety and economy. In order to prevent corrosion, protective coatings can be used as a barrier between the steel surface and the corrosive elements such as seawater or various liquid cargos. However, when coating systems fail the surface will be exposed to the environment with all consequences. From that perspective, the weakest link is the coating used to protect the steel.
Vegetal polymers are today a cost effective solution for complex metallic geometry parts (bolts, flanges, valves, etc…), PVC vinyl film became the same for flat and semi flat shapes (bulkheads, tank walls, pipes, etc…). These methods do not require costly surface preparation such as SSPCSP10, just cleaning per SSPC-SP2. Together it leads complete and long longevity if compared to most of conventional painting procedures, generating both performance and economic benefits.
Microbiologically influenced corrosion (MIC) presents risk to operators and infrastructure in many industries. This work shows the continued potential of novel sulphidogenesis-inhibitory compounds and recent gains towards decreasing the impact of H2S production and on MIC.
To evaluate through fracture toughness tests the susceptibility of SDSS to HISC and to determine the effect of the cathodic protection potential and the stress intensity factor rate (K-rate).
This is a general outline of different types of high-performance coatings used for industrial steel structures and maintenance. We will be discussing the different types of coatings and where and when they are to be used, the make-up of these coatings, application methods, advantages/disadvantages, tolerance, and limitations. I was going to discuss the cost range of each but due to the different performance levels that each brand offers it is hard to put cost in perspective without digging into specific brands of coatings.
Over the past 40 years, three-coat systems consisting of zinc-rich primer, epoxy intermediate and polyurethane topcoat (ZEU) have been the preferred coating system for steel bridge structures in highly corrosive environments due to their proven performance and cost effectiveness.1-6 Each layer serves a different function: galvanic protection is supplied by the zinc-rich primer, while the epoxy intermediate coat provides barrier to water and salts, and the polyurethane topcoat resists against ultraviolet degradation, abrasion, and chemicals.