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Polyurethane technologies have demonstrated their applications in a variety of seamless polymer flooring systems. Aliphatic polyurethanes are widely used as topcoats since they provide combinations of good color stability, gloss retention, abrasion resistance, chemical resistance, and weathering resistance. Recent development in polyaspartic chemistry offers more options in coating thickness, curing temperatures, and solids content.
Spray applied polyurea was introduced to the construction industry in the late 1980 s. By the 1990 s, polyurea floor systems were being installed using early formulations of polyurea, and spray equipment adapted from the polyurethane foam industry. Advancement in raw materials, polyurea formulations, specialized equipment and contractor expertise in recent years has provided increased opportunities for this technology to be used in a wide variety of concrete flooring applications.
This project is to evolve, with the developer of a portable, sponge media blasting system, an alternative to power tool corrosion removal. This is a NAVSEA project managed by the National Surface Treatment Center (NST Center).
Portable plural component low-pressure equipment Utilizing Synergistic Chemistry addresses untapped niche market proves to be provides added growth to the industry.
In today’s protective coating industry, there is a growing demand to proportion and spray 100% solids coatings that are high viscosity and composed of materials that make them compressible during processing. Epoxy intumescent fireproofing is one such material that starts as compressible in the pail and becomes more compressible when heated and agitated under air pressure.
New high-solids compounds for two-component (2K) topcoats based on polyurethane, polyurea and polysiloxane binders are examined with respect to their competitive potential in Europe. Against the backdrop of EU-wide VOC legislation, the relevant market for OEM topcoats applied in stationary facilities is currently estimated at 20,000 t with a material value of a good EUR 100 million.
This paper outlines and summarizes the robust testing and assessment program developed and implemented by the Electric Power Research Institute (EPRI), following upon an initial feasibility evaluation completed in 2015. A multi-year, multi-discipline program has been developed, incorporating significant industry input, to address the identified technical gaps in materials, fuels, chemistry, and radiation safety that need evaluation to support a plant demonstration in a Western-design PWR.
Mixed metal oxide (MMO) is widely used as anode material for the cathodic protection of storage tank bottoms due to its advantages such as low consumption rate long service life and ideal current distribution. However with the elapse of service time the MMO CP systems have been found with such issues as low polarization level and uneven potential distribution threatening the operation safety of storage tanks. In this study numerical modeling and subscale experiment were chosen to clarify the main factors responsible for the aforementioned issues. The results indicated that the inadequacy of polarization and the lack of uniform potential distribution were related to a combination of multiple factors including the anode-to-tank bottom distance the impressed current level and the number of drain points. On the basis of these systematic analyses this paper conclusively proposes certain design principles and maintenance suggestions for the cathodic protection system of tank bottoms.
Potential measurements are often referred to as the ‘language’ of corrosion. They are the most fundamental process in the field of corrosion control. The purpose of potential measurements is to obtain a general idea of the ‘health’ of the cathodic protection system.