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Existing US Navy Coefficient of Friction (CoF) meters are insensitive and cannot differentiate surfaces which have obvious differences in nonskid CoF. A new CoF meter, the m-Deck, was evaluated to determine CoF measurement effectiveness and temperature sensitivity. Both laboratory and field testing were performed over various nonskid systems at numerous temperatures. The results indicate that the m-Deck has significant temperature dependence, but also a high degree of accuracy. The collected data is used to establish acceptance criteria for newly installed nonskid.
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The objective of the research summarized in this paper was to define pipeline conditions where use of the 100-mV polarization criterion may be conducive to possible SCC problems. Paper Number 01592, presented at Corrosion/2001, summarized Part 1 of the research, in which the previous research results were analyzed. In this paper, the results of the laboratory testing are presented.
Pull-off adhesion testing of coatings is commonly used for product testing and qualification as well as quality control / quality assurance. However, initial adhesion values do not necessarily correlate with service life of coatings or their corrosion protection performance. Adhesion of several product chemistries to steel is examined in this study before and after immersion exposure. Results are presented within the context of laboratory corrosion testing in an effort to investigate the significance of adhesion testing in modern lining systems.
A comparative study of methods for attaching telecommunications antenna and coaxial cable brackets to water towers.
When it comes to a bridge structure with a serviceable Organic Zinc / Epoxy / Urethane (OZ/E/U) coating system, there is no golden answer on the most cost-effective maintenance painting strategy. Depending on the severity and amount of corrosion and coating breakdown on the structure, planned maintenance surface preparations range from spot power tool cleaning and spot painting to a full SSPC-SP 10 media blast and full recoating operation.
Although the form and function of a well-designed building are important, it is the long-term performance and durability of a building and its components that will be important to the owner(s) and occupants. Therefore, during the design of buildings, the selection of the appropriate materials and understanding the long-term performance of the specified materials exposed to various site-specific environmental conditions is critical in avoiding the potential “failure by design”. The case study presented will focus on the coating failure by design, that could have been avoided by the original design and construction team and resulted in costly litigation and eventually the complete removal of a key architectural element on two high-rise condominium buildings located along the Florida coastline
Drilling deeper geothermal wells to obtain more energy output per well with higher temperature and pressure and increased corrosiveness. Testing was done in simulated geothermal environment at 180°C and 350°C with a pressure of 10 bar. On high alloy austenitic stainless steel UNS S31254.
Rust is caused by the influence of water, oxygen and time. Air pollution and contaminants on steel surfaces speed up the corrosion process. When corrosion is caused by condensation water, a micro-porous coating can considerably enhance traditional corrosion protection.
The DoD functions under a wide array of infrastructure to include, but not limited to, ships, tanks, combat vehicles and buildings. Due to the nature and need of the building materials, these are always at risk for corrosion, causing the infrastructure to literally crumble. This obviously puts Soldiers in harm’s way due to issues such as weapon misfiring and structural failures.
Financial resources for maintenance of coatings systems for owners of steel bridges are at a premium. Therefore, it is imperative to prioritize and choose the scope of services for maintenance painting of these structures in the most efficient manner. This paper will present the fundamental steps necessary for a detailed condition assessment of the existing coatings of steel bridges.
Development of linings for high temperature, high-pressure applications present a number of special challenges. Challenges include chemical resistance, abrasion resistance, adhesion under cycling temperature and pressure conditions, flexibility, application properties, as well as resistance to pressure and temperature.
Feathering is the process of tapering or blending-in an existing intact coating in preparation of applying a new repair coating. This industry common practice is intended to ensure good adhesion of the repair coating to the legacy coating, and to provide a seamless aesthetic transition for areas where maintenance painting is performed. There are no industry standard requirements for performing feathering, resulting in most specifications having their own unique definition.