Corrosion of Buried Steel at New and In-Service Infrastructure (2023) / Chapter Skim
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1 Introduction
1 Introduction
Pages 11-16
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From page 11... ...
When unexpected corrosion occurs, it is often impossible to determine whether the corrosion was the result of inaccurate site characterization and prediction of environmental corrosivity, poor choice of steel design or protection, material defects, poor construction or quality control practices, insufficient monitoring or maintenance, changes in subsurface conditions, or some combination of these factors. This report summarizes the deliberations of a National Academies of Sciences, Engineering, and Medicine (the National Academies)
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From page 12... ...
BOX 1.2 Statement of Task An ad hoc committee of the National Academies of Sciences, Engineering, and Medicine will conduct a study that will solicit input from the geotechnical and civil engineering and materials science technical communities to critically examine the state of knowledge and technical issues regarding the corrosion of steel used in earth applications (e.g., for ground stabilization, pipelines, and infrastructure foundations) and subsurface environments (e.g., unconsolidated earth or rock in different geologic settings)
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From page 13... ...
Failure of a single component might represent minimal risk to life and safety, and may represent only short-term disruption of infrastructure operation. In other applications -- for example, a 100 kilometers-long steel pipeline transporting combustible fuels -- the infrastructure may be buried in numerous kinds of earth materials under different environmental conditions.
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From page 14... ...
Ductile iron is an innovative type of graphiterich cast iron, with graphite incorporated into the metals in nodules rather than flakes, as is the case in cast iron. Carbon included in this manner provides improved impact and fatigue resistance.
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From page 15... ...
In addition to information gathered through talks and panel discussions during those meetings, the committee relied on its collective and extensive expertise, held one-on-one discussions with experts on a variety of topics, and consulted the published and unpublished literature, instrumentation manuals, and the standards and regulations established for multiple industries. As discussed earlier, corrosion scientists, geotechnical engineers, and structural and civil engineers have developed their knowledge of corrosion of buried steel and corrosion protection almost independently, and their vocabularies have evolved in response to practices in each of the different fields.
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