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Epoxy coatings are a mainstay of the protective and marine coatings markets. Used as intermediate coats over inorganic and organic zinc rich primers or used as direct-to-metal primers in coating systems, epoxy coatings are widely recognized for their versatility and the excellent corrosion resistance they provide. One drawback to current epoxy coating technology is that it requires separate packaging for the epoxy resins and the amide or amine hardeners because the chemical reaction between these materials causing the applied film to cure to a dry state would also cause the bulk material to gel if packaged together (pot life).
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Starting in the 1940’s, solution vinyl resin coatings were used extensively to protect steel structures in fluctuating immersion service from corrosion. However, these systems fell out of favor when more restrictive volatile organic compounds regulations were implemented in the 1990’s. Since then, traditional epoxy systems have become a workhorse in the protective coatings industry. Unfortunately, these materials tend to degrade in sunlight, and experience has revealed their service life to be suboptimal compared to legacy coatings systems such as vinyls
Guidelines for establishing minimum requirements to ensure proper application and performance of plant-applied, fusion-bonded epoxy (FBE) coatings to the external surfaces of pipe. Historical Document 2002
Operation of holiday detector equipment used on fusion-bonded epoxy (FBE) pipeline coatings following shop application and prior to on-site installation of the coated pipeline.
The Southern Nevada Water Authority (SNWA) is a regional agency whose mission is to manage water resources and develop solutions that will ensure adequate future water supplies for the Las Vegas Valley. Its primary water resource is the Colorado River via Lake Mead. Since 2000, persistent droughts have resulted in decreasing Lake Mead water levels. To reduce Southern Nevada’s reliance on the Colorado River, SNWA has begun planning for the development of in-state groundwater resources north of Las Vegas. Initial planning efforts identified project specific requirements that could potentially justify the use of polyurethane lining systems in lieu of traditional cement mortar lining for over 200 miles of large diameter water transmission pipeline.
In the worldwide oil and gas industry, the application of epoxy phenolic coatings has been a dominant strategy to obtain high heat resistance from coatings and to mitigate corrosion under insulation (CUI) of both insulated carbon and stainless steel pipes operating up to 392°F (200°C). These coatings, however, are sensitive to overapplication, prone to cracking, and costly to repair when damaged.
Coating application on the exterior of ocean-going vessels and offshore platforms is normally very time sensitive, and frequently must be performed during times of high humidity, sweating hulls and daily rain showers. This paper will describe the use of solvent free, surface tolerant epoxies that can be applied to wet surfaces during times of very high relative humidity. Both the positive and negative aspects will be covered.
The Use of Ultra-High Build, Fast Return to Service Coatings on Concrete Structures to Shorten the Construction Schedule at the Expansion of the Norman, OK Wastewater Treatment Plant.
Embarking on an exploration of intriguing coating failures, where sophisticated analytical techniques are used to dig deep within the coating, fascinating and unexpected discoveries can sometimes occur.
This paper will discuss common coating failures seen in water storage tanks and discuss how these failures can be addressed by the use of OAP coatings designed for potable water service.