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Reinforced concrete structures are subject to many types of deterioration. Many of these are visible; however, one that is not is the crevice corrosion that occurs internally at the reinforcing bars. To detect, mitigate and delay this type of insidious corrosion, a form of cathodic protection in the form of thermal sprayed coatings will be discussed. To implement this as a corrective action as well as a preventive action is the theme of this paper.
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Remote monitoring is becoming an increasingly more accepted way of gathering data from test stations. Not only because the value of having continuous data often exceeds that of performing spot-wise measurements in time, but also because the cost of collecting data manually is getting higher. Still, regulations require annual surveys to document the safe operation of pipeline CP systems.
Deep well casing is an important part of oilfield production. In the long service life of well casing, corrosion can result in wall thinning and even perforation of the casing due to contacting with soil, water and other naturally occurring substances within the formation. The most economic and effective method to decrease corrosion of well casing is cathodic protection (CP). However, the vertical depth of casing is several kilometers, and CP current requirements of casing in different layers are quite different. At the same time, the conductivity of different formations will affect the distribution of CP current.
Experiments to study the effects of AC interference on cathodic protection (CP). Changes of CP potential and current density under AC interference and AC corrosion rates obtained. Effective CP potential under AC interference analyzed. Interference compared.
Corrosion of metallic pipelines is a significant source of failures to drinking water utilities. Cathodic Protection has been used for buried metallic pipelines for decades but not widely used in the water industry. Preliminary findings of the on-going Water Research Foundation project.
DOWNLOADABLE HISTORICAL DOCUMENT. The purpose of thie Recommended Practice is to present procedures and practices for achieving effective control of external corrosion on buried or submerged metallic piping systems.
Control of external corrosion on buried/submerged metallic piping systems and other structures. Use of electrically insulating coatings, electrical isolation, and cathodic protection as corrosion control methods for existing bare, existing coated, and new piping systems. Interference currents. Historical Document 1976
埋地或水下金属管线系统外腐蚀控制的推荐作法
Achieving effective control of external corrosion on buried or submerged metallic piping systems. Design. Coatings. Cathodic protection. Installation. Interference currents. Costs.
Standard for achieving effective control of external corrosion on buried or submerged metallic piping systems or other buried metallic structures. System design. Coatings. Cathodic protection criteria & installation. Control of interference currents. HISTORICAL DOCUMENT
Procedures and practices for the control of external corrosion on buried or submerged metallic components of residential electrical distribution systems, referred to as URD systems. Design. Handling. Storage. Installation. Operation. CP.
NACE RP-01-1972 final publication as NACE RP0180-2001 was withdrawn by NACE International on 6/1/2010. This document was not replaced.
HISTORICAL DOCUMENT. Accepted practices for the cathodic protection of those metallic components of effluent clarifiers which are in contact with water.
Procedures to determine the need for cathodic protection (CP) - including current requirements - for well casings and gas storage. Design and installation of CP systems. Operation and maintenance. Historical Document 1986