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AC Corrosion of Pipelines covers the essential topics related to AC corrosion of pipelines, a problem affecting the safety and reliability of underground pipelines.
In addition to the basic principles of AC interference induced by adjacent AC power lines and other sources, the book details the adverse effects of the interference on collocated pipelines, including corrosion and pitting corrosion, coating degradation, deviating of cathodic protection potentials, and the ineffectiveness of cathodic protection systems.
Moreover, effective management measures to this problem are discussed. It also covers the DC interference and DC corrosion of the pipelines, as compared to the AC corrosion phenomenon. The book, the first of its kind, provides a complete and comprehensive understanding to the phenomenon from both the fundamentals and the author's research experiences.
AMPP 2021, 284 pages, 6 x 9, Paperback
Corrosion has long been recognized as an extremely costly naturally occurring phenomenon that can be controlled through the proper application of corrosion prevention and control methods protecting public safety, extending the service life of assets and preventing damage to property and the environment. The landmark Cost of Corrosion Study published by the U.S. Federal Highway Administration estimated that corrosion costs were approximately 3.1% of the nation’s GDP. Within the study, several key sectors of the US economy were studied. This paper is focused on one of those areas – the corrosion risks associated with storage tanks that contain hazardous materials. The study determined that the annual direct cost of corrosion for above ground hazardous material storage tanks (ASTs) in the US was ~$4.5 billion.
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.
A life cycle cost assessment led to the selection of DSS for field gas gathering network composing of more than 200 miles of pipelines. Buried portions are provided with external coating. Furthermore, due to high chloride content in the soils, the external corrosion threat was mitigated through the use of an external coating supplemented with CP.
As there was no industrial reference covering onshore DSS pipeline CP criteria, lab testing was conducted to establish the criteria and confirm if the risk of hydrogen embrittlement is managed appropriately. This is further evaluated with field data to confirm pipelines integrity.
New in 2019!This NACE International standard practice establishes the general principles to be adopted to minimize the effects of stray current corrosion caused by direct current (DC) and/or alternating current (AC) from external sources on steel reinforced concrete (RC) and prestressed concrete (PC) structures or structural elements. The standard practice offers guidance for the design of concrete structures that may be subject to stray-current corrosion; the detection of stray current interference; the selection of protection measures; and the selection of mitigation methods.
The purpose of this NACE International technical report is to provide basic information regarding the mechanisms involved with cathodic protection (CP) shielding for external coatings applied to carbon steel pipelines, and the manner in which the breakdown of coating systems may or may not contribute to CP shielding. It is intended to be a basic reference from which the tendency of a coating system to fail and shield CP may be understood on a conceptual basis. Non-corrosion-related pipeline protection systems, including concrete weight coating, polyethylene encasement, insulation, and mechanical pipeline protection systems, are outside the scope of this report. End users of this report may include pipeline designers, corrosion engineers, integrity management specialists, regulators, CP service providers, coating suppliers, coating service providers, equipment suppliers, and pipeline/facility owners.