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There are several design factors that need to be considered when specifying coatings in water and wastewater concrete structures. Issues include treating surfaces with exposed aggregate, with a low pH, and exposed reinforcing steel. This paper will present three examples of important design considerations based on field experiences that can avert lining performance problems and impacts on a project schedule or budget. Specific examples from a number of projects will be used to illustrate these design considerations.
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Specifying corrosion protection for the offshore wind turbine industry in the European CEN TC219(2) committee. This comprises corrosion protection specification for external as well as internal parts of the turbine foundations.
Time is money and the ability to speed up the process of taking and analyzing coating thickness readings will always pay dividends in reducing inspection costs. Scanning an area of painted steel will always be quicker than taking individual readings but there was always the danger of wearing the probe and reducing its life.
The goal of this presentation is to highlight the teamwork exhibited by a quality driven facility owner who led an outsourced contract team consisting of pre-qualified contractors, material suppliers, and certified technical service specialists as independent third-party inspectors, to provide external protective coatings to a set of six spherical tanks encompassing approximately 100,000 s.f. each.
Following the worlds growing need for sustainable energy solutions, offshore wind farms are important contributions to the generation of renewable energy. One key element for a profitable and sustainable operation of offshore wind farms is that the installations are protected with the most cost-effective corrosion protective solution for the entire lifetime. In practice, this means that today’s projects are planned with an estimated lifetime of a minimum of 25 years without major maintenance of the corrosion protective solution.
Microbiologically influenced corrosion (MIC) is one of the most aggressive forms of corrosion leading to infrastructure and equipment damage in various industries, including but not limited to the oil and gas industry,1 water systems,2 medical devices,3 marine environments,4 nuclear waste storage facilities,5 and aviation fuel systems6 and storage.7 MIC received great attention because of the increasing cost associated with corrosion damage, particularly in oil and gas industry. The overall cost of corrosion has been estimated to be approximately 3.4% in the global Gross National Product8 which equates to approximately $2.9 trillion in 2018.9 A conservative estimate shows that 20% of all corrosion in aqueous system is MIC,10 which accounts to billions of dollars in the US.
One of the, if not the most, vexing problems for bridge maintenance personnel is the deterioration of bridge components below leaking joints. The joints may be open or closed, construction or expansion, but all seemingly leak shortly after construction or resealing. The bridge components affected by the leaking joints may be steel or concrete, but the end result is the same, deterioration.
This paper summarizes the work performed under 2011 funding from the National Shipbuilding Research Program (NSRP) Surface Preparation and Coatings Panel.
The polyurea technology has been developed by Texaco chemical in the 80’s. First developed for the reaction-injection-molding (RIM), it has been adapted for spray application. The development in the spray equipment in the 90’s has enabled the commercialization of 100% solid polyurea spray elastomeric coatings.
In the late part of the 1980’s, the inventor worked with the reflective coating companies that made “NASA ceramic paints”. During this time that he worked with the reflective companies, he learned that the formulas used for reflective paints were not made from NASA technology and were only good for light reflection. When the coatings became dirty or tarnished, the coatings did not reflect heat.
Details of a test procedure jointly developed by TNO/Endures, Netherlands to assess the long term performance of insulation systems when a damaged section of the system is subject to a continuous salt-water spray environment.
The function of the NSV (hose-end non-return valve, first used in the North Sea) is to create a safetyconnection between the FPSO and the shuttle tanker during mooring and oil transfer. This connectionis made using the Loading System at the Bow of the tanker vessel through the BLS (Bow LoadingSystem). After carrying out all necessary checklist and communicating with the tanker, the marine crewfrom FPSO start to pay the offloading mooring cable that connects on Dynamic Positioning ShuttleTanker (DPST).