A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cathodic Protection of Civil Works Structures
This report lists various design considerations for cathodic protection systems and provides several examples of such systems. It also contains the results of field surveys of U.S. Army Corps of Engineers (CE) installations which have used or are using cathodic protection on hydraulic structures. These surveys indicate that (1) graphite slab anodes can be softened by oxygen attack, (2) unprotected sausage anodes are often damaged by river debris, and (3) button anodes resist river debris and ice damage; button anodes examined during the survey were found to have performed well over a period of 7 years. In addition, it was determined that the current requirement for cathodic protection of 1 sq ft (0.092 sq m) of bare steel in aerated water is 2 mA/sq ft (22 mA/sq m). However, since cathodic protection current increases with water velocity, a square root dependence was measured using a cylindrical specimen rotating at a surface velocity of up tp 4 ft/s (1.2 m/s). Finally, it was determined that platinized anodes have a good potential for application in impressed-current cathodic protection systems. (Author)
Cathodic Protection of Civil Works Structures
This report lists various design considerations for cathodic protection systems and provides several examples of such systems. It also contains the results of field surveys of U.S. Army Corps of Engineers (CE) installations which have used or are using cathodic protection on hydraulic structures. These surveys indicate that (1) graphite slab anodes can be softened by oxygen attack, (2) unprotected sausage anodes are often damaged by river debris, and (3) button anodes resist river debris and ice damage; button anodes examined during the survey were found to have performed well over a period of 7 years. In addition, it was determined that the current requirement for cathodic protection of 1 sq ft (0.092 sq m) of bare steel in aerated water is 2 mA/sq ft (22 mA/sq m). However, since cathodic protection current increases with water velocity, a square root dependence was measured using a cylindrical specimen rotating at a surface velocity of up tp 4 ft/s (1.2 m/s). Finally, it was determined that platinized anodes have a good potential for application in impressed-current cathodic protection systems. (Author)
Cathodic Protection of Civil Works Structures
A. Kumar (author) / R. Lampo (author) / F. Kearney (author)
1979
77 pages
Report
No indication
English
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