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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.
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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.
Management and operating teams, across all industries, but especially inside asset management organizations, must increasingly rely on data-driven assessment and analytics for decision making. Clearly, inefficiency and ineffectiveness associated with manual or poorly optimized business processes and fragmented business management Infrastructures is a barrier to formulating the safest, most efficient and cost effective asset management and operational decisions. According to Deloitte’s digital maturity analysis, the midstream industry and specially the pipeline sector is in its lowest stages of digital adoption (first 20-30% progress).
For each sample project, the service environment (i.e. exposure conditions) and anticipated maintenance painting sequence needs to be defined. The service environments correspond to ISO 12944-2, “Classification of Environments.” The referenced paper (referred to as the Paper) presents a sequence for typical maintenance painting.
This sequence includes the follow steps:
Original PaintingSpot Touch-Up and Repair (1 or 2 cycles)Maintenance Repaint [spot prime and full coat] (1 or 2 cycles)Full Repaint [total coating removal and replacement]
Becht is among multiple engineering groups which has developed a practical model to continue giving owner-operators higher confidence by extending HTHA assessment methodologies to be more quantitative using decades of development from the literature. This model has incorporated a well-established analytical damage model that can produce time-based Nelson Curves for carbon steel and C-0.5Mo materials, based on the temperature, hydrogen partial pressure and applied stresses.
The key to any quantitative model is managing the input parameters and validation of input data.
The impacts of marine biofouling to the maritime and naval communities, as well as the planet as a whole are well documented. Whether its increased fuel consumption and carbon emissions, transport of invasive species, or that it just plain looks bad, marine biofouling needs to be addressed more aggressively, be that timely removal of growth, or increased monitoring of hull condition to know when it’s time for removal. Current methods of removing growth are costly both in time and money, potentially environmentally unfriendly and risk impacting the health of the ship’s coating system.
Aluminum (Al) alloys are the most common non-ferrous metals used (approximately 25 million tons per year) and the second most commonly used metal alloy after steel1. Some of the properties of Al alloys that attribute to their worldwide use include lightness, thermal conductivity, electrical conductivity, suitability for surface treatments, and corrosion resistance. Al alloys are also combined with other metals/materials to achieve desired properties for specific applications. Al alloys can be joined to other materials with ease to enhance their combined properties with the following techniques: welding, bolting, riveting, clinching, adhesive bonding, and brazing1.
In Corrosion/2021, the authors introduced a molecular mechanistic model that quantifies and predicts SNAPS corrosion rates. During Corrosion/2022, we presented the mechanistic corrosion prediction framework describing the molecular basis of the model’s reactions, kinetics, and mass transport of ROSC to vessel walls. In this molecular model, sulfidation corrosion is calculated for direct heterolytic reaction of ROSC with solid surfaces.