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HISTORICAL DOCUMENT. Determining the potential and current capacity characteristics under laboratory conditions for aluminum and zinc alloy anodes used for cathodic protection.
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For the hospital administrator who is concerned with meeting the newer CDC (Center for Disease Control) and JCAHO (Joint Commission on Accreditation of Healthcare Organizations) protocols without sacrificing aesthetics and durability, there are new developments in architectural coating technologies for targeted hospital environments that require a higher frequency of cleaning with harsher disinfectants.
Recycled steel grit and shot have a well-established place in the industry and long, successful track record.
Population growth in city centers has spurred the expansion and new construction of direct current (DC) powered transit systems throughout the world1. Despite stringent design criteria, quality assurance and quality control (QA/QC) monitored construction practices and ongoing track maintenance, it is a fact that DC stray current will eventually occur and negatively impact buried and/or submerged metallic structures immediately adjacent and within the transit right-of-way (ROW)2. In combination with other methods to reduce stray current such as high track-to-earth (TTE) resistance values and shorter distances between substations, transit agencies are specifying the welding of reinforced steel structures within their purview such as retaining walls and footings, approach slabs, aerial inverts, and bridge abutments to prevent stray current from reducing the design life of surrounding metallicstructures.
Requirements for sheet rubber lining of various equipment for protection against corrosion and/or abrasion. This standard can be used in design, installation, inspection, testing, and storage of rubber-lined equipment. Historical Document 1998
For years, accelerated weathering test equipment has been utilized to showcase performance of coatings as a means to justify changing to new and “better” materials. While an accelerated weatherometer is useful in confirming a material’s performance, the results can be misleading in certain situations, resulting in misguided decisions based on a marketing department’s zeal to secure additional sales.
Quality Assurance (QA) paint testing is an important obligation of any paint manufacturer and/or end user. Each year, hundreds of batches slotted to be applied on US Army Corps of Engineers (USACE) hydraulic steel structures around the country are submitted to be tested at the Engineering Research Development Center, Construction Engineering Research Laboratory, Paint Technology Center (ERDC-CERL-PTC). A significant fraction of those samples fail.
Maintaining the integrity of oilfield equipment is essential to its safe operation and to maximize the efficiency of production. The integrity of oilfield equipment can rely on material selection and control of conditions, however, it is commonly maintained by the applications of chemical corrosion inhibitors (CI). Prior to use, these chemicals must be shown to perform as desired under the field conditions in question. To achieve this, chemicals are often evaluated using robust laboratory-based screening studies to identify potential candidates.
This paper will focus on the use of composites to repair and protect piping in the facility environments. Composites as a preventative option for location of soil-to-air interfaces and pipe support locations and the ability of composites to repair bends and restore the structural integrity of the facility piping will be discussed. Testing and currently in use examples will be used to show the benefit of composites in facility integrity systems, including the ability to keep the facility safe while avoiding a costly shutdown
Located on the banks of the Kanawha River surrounded by the rugged Allegheny Mountains, the gilded lead-coated copper dome of Cass Gilbert’s 1932 West Virginia State Capitol has never successfully weathered the harsh climate nor withstood the test of time. Although beautifully detailed and successful at resisting water infiltration, the dome’s appearance was problematic soon after its completion and has remained so even after four significant refinishing campaigns - in 1946, 1961, 1977 and most recently in 1988.
Determining the deposit weight density (DWD) on a boiler tube surface, via the glass-bead-blasting technique. Removes most boiler deposits. Useful when other methods fail.