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Selection of coating systems for commercial projects may appear to be a simple task, but to ensure a successful project the Architect or the Engineer needs to perform a thorough and appropriate evaluation of the project to match the right coating systems with the required substrates and environments.
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New gas field expansion will provide offshore facilities to process non-associated gas, where the newgas gathering system takes non-associated gas from offshore gas wells and transports it throughpipeline to onshore processing plants. The gas is very corrosive due to high levels of H2S and CO2 acidgases content. Further hydrate control is achieved by injecting mono ethylene glycol (MEG).
Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry.
This paper will discuss issues related to corrosion protection of high temperature carbon steel substrates which are insulated to preserve energy, provide process control and to keep workers safe from burn injuries.
While corrosion protection is the primary driver in the selection of protective coatings for a specific project, aesthetics is often a key component for consideration with owners and engineers. This paper will discuss the evolution of generic protective coatings used for exterior aesthetic purposes, focusing on new product developments, improvement in formulations and testing methods that have resulted in improved performance relative to color and gloss retention of finishes for exterior substrates.
This study describes an effort to find a method to control bacteria in 130 remote freshwater fiber glass storge tanks with an effective low-cost, convenient treatment method. Freshwater, in this application, is being used to control halite scale formed in the production from unconventional oil wells in the Williston, North Dakota, USA area. The water is sourced from local freshwater rivers and trucked to location and stored in 400 barrel (bbl) freshwater tanks. The water stored in the tanks is injected continuously, and the tanks are refilled on a variable schedule.
topcoats utilized on the exterior skin of Department of Defense (DoD) aircraft (i.e., fixed and rotary wing) and ground support equipment (GSE) are two-component (2K) polyurethanes (PUs) that are qualified to MIL-PRF-85285 performance requirements. These topcoats are formed from the chemical MARCH reaction of hydroxyl- and isocyanate-functional molecules to generate highly cross-linked polymeric networks that contain carbamate (i.e., urethane) linkages. Formation of these cross-linked networks result in durable coatings with excellent hydrocarbon resistance, mechanical and thermal properties, including resistance to ultraviolet (UV) degradation from sunlight.
According to ISO 15156(1) standard, the acceptability limits of duplex stainless steels for a safe use in exploration and production environments are defined based on the PREN (Pitting Resistance Equivalent Number) of the considered alloy. For a duplex stainless steel with 30 < PREN < 40 (typical of 22%Cr steels), the alloy is acceptable up to a H2S partial pressure of 0.1 bar while this partial pressure can be increased up to 0.2 bar if 40 < PREN < 45 (typical of 25%Cr steels).
Low-viscosity oils could potentially act as self-healing barrier coatings because they can readily flow and reconnect to heal minor damage. For the same reason, however, they typically do not form stable coatings on metal surfaces. Increasing viscosity helps to stabilize the oil coating, but it also slows down the healing process. Here, we report a strategy for creating highly stable oil coatings on metal surfaces without sacrificing their remarkable self-healing properties.
Truly self-healing materials have the capability to repair themselves when they are damaged without the need for any external intervention. Self-healing systems based on microencapsulated healing agents developed by researchers at the University of Illinois at Urbana-Champaign were initially developed with polymerized resins and reinforced polymer composites as the intended applications. In this paper, we discuss the principles that emerged in the design of these self-healing systems and how they are presently used in design and optimization of self-healing systems for industrial and marine protective coatings.
A homogeneous mixture of two immiscible polymeric binders were dissolved in a common solvent or a mixture of solvents was applied as a thin film. The first polymeric binder was a bisphenol-A (BPA) based epoxide, epoxide modified with tetraethoxysilane (TEOS) oligomer, or phosphated epoxide. The second polymeric binder was a fluorinated acrylic copolymer.
This paper will focus on the advancement of waterborne acrylic coatings that features self-stratifying technology which significantly advances performance of color and gloss retention. Various analytical methods were used to verify stratification. Magnified cross sections of the coating film will show the layered effect and discussion of how these multiple micro-paint layers outperform standard acrylics. An overview of performance testing will be presented to demonstrate the value of this technology and how it contributes to longer lifecycle costs and lower overall project costs.