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The mechanical properties of polymeric coatings are often overlooked because researchers are not aware of how modern instrumentation can now aid them in understanding how a particular product may survive in service conditions. In many applications the two main considerations are aesthetics and durability, both of which can be directly related to the mechanical properties of the base material.
The coating of concrete floors is always challenging. Unlike walls, ceilings, tanks, bridges and other structures floors have vehicular and pedestrian traffic. This usually means that they are coated during off hours with tight schedules. Contractors need to plan the projects to meet the needs and schedules of owners. Often times this means multiple trips to the facility to review the scope of work and provide workable schedules. Required testing is generally performed prior to the scheduled start of work or after the floors are back in service.
The use of linings to rehabilitate concrete surfaces in water and wastewater environments has been increasing. This paper discusses the basics of concrete, concrete deterioration, and subsequent rehabilitation options, with an emphasis on coatings.
HISTORICAL DOCUMENT. This standard outlines procedures for preparing, installing, and analyzing metallic corrosion coupons. Factors considered in the interpretation of results obtained from these corrosion coupons are also included for the use of oil and service industry personnel. This standard is maintained by TG 409.
SCC of Ni-base filler metal (FM) 82 has been reported in the nozzles and other components in Light Water Reactors (LWRs). The typical characteristics of stress corrosion cracking (SCC) of Ni-base alloys are a long incubation time followed by slow propagation, which can suddenly transition to fast propagation. Whilst there has been considerable effort expended to develop an SCC mechanism that can explain and predict SCC in Alloy 600, fewer studies have investigated SCC of FM 82. The Preferential Intergranular Oxidation (PIO) SCC mechanism of Alloy 600 proposed by Bertali et al. which is an evolution of the Selective Internal Oxidation SCC mechanism proposed by Scott and Le Calvar is considered one of the most representative primary water SCC mechanisms for Alloy 600.
The surface properties of metals can be modified by using thin hybrid coatings without changing the metallic look of the surface. These properties include for example anti-fouling, abrasive resistance and corrosion resistance.
A polished concrete floor project can be a very rewarding experience, as well as a tough lesson. Experience in the field and following certain guidelines can make a job much more rewarding and cost effective. Cutting corners or a misdiagnosis of the floor itself and/or environment can yield disastrous and costly results. In this article, we will walk you through the basic steps along with a complete overview of polished concrete. We will examine all steps, including environment, concrete diagnosis, grinding, densifying, polishing, color, and of course, maintenance.
Requirements for the application of organic coating materials to pipelines for underground service…to prevent corrosion of steel pipe by isolation from the surrounding environment. Historical Document 1975