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The paper will be a discussion of the various generic lining products available in the marketplace today, required application methods and potential issues associated with each. Additional discussion will take place around ancillary work required to achieve a successful long-term installation.
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This paper will provide recent corrosion data for stored chemicals. Duplex stainless steel corrosion curves obtained in nitric, sulfuric, phosphoric acids as well as several kinds of waters will be provided. In addition, atmospheric corrosion data obtained after 15+ years of sample exposures in several geographic areas will be shown. These results will be compared to those obtained with other materials commonly used for the construction of storage tanks.
This paper deals with the issue of surface contaminates analyses presently available on the market. The amount of variations of analyses and more important statements of the results cause great problems on the market. Described in the paper are not only the analyses possible, but also the interpretations belonging to them. However, salt measurements are used worldwide, its basics often appear to be a worldwide mystery. This paper should clarify the most common made mistakes.
Field pH testing on vertical concrete prior to application of high-performance protective linings is primarily required to confirm the removal of deleterious substances following surface preparation. This paper explores the use of various in situ testing techniques for measuring surface pH on vertical concrete.
Cemented carbides have been widely used to make parts for wear applications due to the excellent combination of hardness and toughness. Cemented carbides represent a group of composite materials containing hard metal carbides, such as tungsten carbide (WC), bonded by ductile metallic binder agents, such as cobalt (Co), nickel (Ni), or iron (Fe).1 By varying WC grain size, weight fraction of metallic binder, and processing parameters, a wider range of microstructure and mechanical properties can be achieved.
EIS is one of the techniques which is frequently used for studying electrochemical reactions on a metal surface in an aqueous environment. However, one of the main challenges in using EIS is the interpretation of results. Various interpretation methods and their associated uncertainties lead to ambiguous outcomes and often end up with a biased analysis One of the methods frequently used is the so-called “equivalent electrical circuit” method which models the response of and electrochemical system by matching it to that of a combination of “analogous” electrical circuit components, such as resistors, inductors, capacitors, etc.
Many industrial processes contain H2, CO, CO2, and H2O gas mixtures, such as syngas production and processing in hydrogen, ammonia, and methanol plants. These process environments have high carbon activity, i.e. ac > 1, and low oxygen partial pressure at their elevated operating temperatures, such as in the temperature range of 400-800 °C (752-1472 °F). The high carbon activity could result in a catastrophic material degradation, i.e. metal dusting. The resulting corrosion products consist of carbon or graphite and metal particles, along with possible carbides and oxides, and cause material disintegration.
Corrosion is a common and critical issue in the oil and natural gas industry and it adversely affects the component functionality and structural integrity of infrastructure for exploration, production, transportation, processing, and CO2 sequestration. The natural gas delivery system includes 528,000 km (328,000 miles) of transmission and gathering pipelines in U.S. According to the Pipeline and Hazardous Materials Safety Administration (PHMSA) database, corrosion has caused ~25% of the natural gas transmission and gathering pipeline incidents over the last 30 years in the U.S., and 61% out of corrosion-caused incidents were due to internal corrosion.
Bridge Owners are always on the lookout for a coating system for steel bridges that will perform for the longest time, and at a reasonable price. Metallizing has long been considered one of the best coating systems but the lack of qualified applicators simply has not made it available as an economical option. The success of early metallizing encouraged the investment in metallizing for Owners and bridge fabricators, and spurred on its significant growth over the past decade.
Real energy savings data for residential buildings is scarce and difficult to find. To address this concern, two identical houses were built in the outskirts of Monterrey, Mexico, where summer temperatures are usually very high (˜113°F). Energy consumptions using different waterproof coatings with different values of solar reflectance were evaluated.
A test methodology is shown for field application of electrochemical impedance spectroscopy (EIS). The method utilizes low-cost, accessible materials to secure a temporary solution cell to the infrastructure’s coated surface. A laptop computer provides the power source and operating system for the mobile potentiostat during EIS data collection. This data provides a quantitative measure of the coating condition. The objective of this work is to incorporate EIS testing into standard coatings inspection to estimate remaining service life for the intact coating, which improves coatings maintenance planning for facility owners.
This paper presents the findings of an investigation that was carried out to determine the root cause of the premature failure of Ni-coated carbon steel fittings on the water injection composite piping system installed at an oil production facility in Western Canada. The facility had been in operation since 2011 without major corrosion issues. Many of the Ni-coated fittings, which are expected to have a service life of 20 years, started to fail (developed leaks) unexpectedly after about 4 years. The core structure of composite pipe is a high-density polyethylene (HDPE) inner pipe, a middle layer of high-strength dry fiberglass, and a protective thermoplastic outer jacket. The interconnecting fittings are made of carbon steel coated with a thin, ~40 micron (1.5 mil) layer of Nickel.