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Several alternating current (AC) coupon test stations (CTS) located near AC power lines were investigated to assess the AC interference corrosion risk of the test coupons. Asstation consisted of two ½ inch (1.27 cm) diameter and 1received each AC test inch (2.54 cm) long carbon steel (CS ) coupons. Coupons are much larger than 1 cm 2 and current density measurements are not 100% relatable to the SP21424 or ISO 18086 criteria, since these refer to measurements on (typically) 1 cm2 . The current densities measured on the coupons in this study will underestimate the AC corrosion threat.
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Concrete is one of the most durable construction materials available, but all too frequently we ignore its maintenance. Many of the techniques called "coating", "protection", and corrosion mitigation are, maintenance of concrete. The life span of concrete structures can be significantly extended by pro-actively addressing deterioration and durability issues through keeping water and other deleterious materials out of concrete after it has properly cured
Over the past few decades surface preparation standards have been implemented to provide guidance on determining the necessary surface cleanliness for specific applications. Prior to such standards, surfaces were prepared as they saw fit at the time of application which created high variability in performance of the protective coating. Since the standards were developed, the resulting performance consistency has become increased significantly. Such standards discuss a visual inspection of the steel after an abrasive material has been used to remove scale, rust, and other discoloration soils.
Approximately one cubic yard of concrete is placed annually per person on the planet with existing concrete estimated to be 30 times this amount (1). This presentation will discuss the basics of concrete, the various alternatives for control of corrosion in reinforced concrete structures, including prevention, protection, and mitigation, and strategies for selection of these alternatives. The pros and cons of each technique will be reviewed as well as the applicability considerations for the life cycle of the structure.
This paper proposes a theory for how a successful water wash achieves salt corrosion control, the mass-transfer considerations driving this process and how popular practices may contribute to or hinder successful outcomes.
As governments around the world seek to promote the adoption of lower-carbon fuels, credits are available for fuels which satisfy various low-carbon or renewable fuels standards. In the United States, the most common standards discussed include California’s Low Carbon Fuels Standard1 and the US EPA’s Renewable Fuel Standard2. These standards define the acceptable methods (called pathways) for conversion of renewable feeds into consumer fuel products. In order for a producer to be eligible for credits, one of the acceptable pathways must be used. The most common pathway presently being used or considered by most facilities is hydrotreating.
The data produced in this study indicates that there are differences between the ICRI CSP comparator panels and TACM CSP comparator panels. Further, there are differences between taking direct measurements from known surfaces (i.e., the ICRI and TACM CSP panels) and obtaining indirect measurements from an epoxy putty casting of those same known surfaces. Therefore, it is important that the specifier indicate which method is to be used when qualitative or quantitative methods are invoked in the contract documents.
Coatings are widely used for highway steel bridges exposed to aggressive environments to extend their service life. Even with the continuous development of coating technologies, steel bridges remain susceptible to corrosion deterioration. Periodic maintenance, that may include coating repair, is required for long term bridge serviceability. Selection of compatible repair coating materials and appropriate preparation of the steel surface are critical parameters for corrosion protection.
As CORROSION journal celebrates 75 years of corrosion mitigation and control research in 2019, we offer a selection of articles by decade. These articles remain the most viewed research articles of their respective decade, highlighting important topics, experimental methods and discussions surrounding the pertinent research of the day, and they continue to provide intelligence, perspective and insights for today’s corrosion research.
The subject wells are part of a project by San Francisco Public Utilities Commission (SFPUC) todevelop a groundwater supply in the South Westside Basin of San Francisco for use duringdrought conditions for Daly City, San Bruno, and the South San Francisco District. The projectincludes construction of 13 groundwater wells with a total capacity of 7.2 million gallons per day(mgd). During routine maintenance inspection of two of the wells in Daly City, severe corrosionwas observed on the pump columns and on the stainless steel pump shaft.
This NACE best-seller is based on the authors' course, The Corrosion & Protection of Metals. This edition of this classic text is based on notes used by the authors for more than a decade in their course, The Corrosion and Protection of Metals. The authors emphasize the engineering aspects of corrosion and its control in ways that will be helpful to the practicing engineer. Topics covered include corrosion economics, detecting and monitoring corrosion, regulations, specifications, safety, and the selection and use of materials, with special emphasis on stainless steels. 1995 NACE E-BOOK
Corrosion is one of the major issues in oil and gas production, as well as geothermal energy due to the aggressive environments, such as high temperatures and pressures.1, 2 Material selection for downhole tubing is therefore paramount importance to ensure well integrity. Thus, the selected materials must be corrosion resistant, cost-effective, reliable, and have the required strength for such arduous conditions.