ENDURANCE LIMIT ENHANCEMENT OF STRUCTURAL STEEL IN SEA WATER BY CATHODIC PROTECTION
The phenomenon of endurance limit enhancement, whereby the fatigue limit of notched structural steel in sea water is increased by cathodic polarization to above the value in air, has previously been reported. The magnitude of enhancement has been shown to vary with potential, specimen size and frequency; and the effect itself has been rationalized in terms of calcareous deposits which form within the crack and either reduce the effective stress intensity range or interfere with surface slip. Additional experiments are reported which bear upon occurrence of endurance limit enhancement in large components and members. The results are discussed with regard to welded tubular joints of offshore structures, and a cathodic protection system design is proposed which takes advantage of endurance limit enhancement in such applications.
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Supplemental Notes:
- Proceedings of the 11th Annual Offshore Technology Conference, Houston, Texas, 30 April-3 May 1979.
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Corporate Authors:
Offshore Technology Conference
6200 North Central Expressway
Dallas, TX United States 45206 -
Authors:
- Hartt, W H
- MARTIN, P E
- Hooper, W C
- Conference:
- Publication Date: 1979
Media Info
- Pagination: p. 1331
Subject/Index Terms
- TRT Terms: Anodic polarization; Cathodic protection; Corrosion protection; Fatigue (Mechanics); Joints (Engineering); Stresses; Tubular structures
- Uncontrolled Terms: Fatigue life; Stress intensity factors
- Old TRIS Terms: Tubular joints
- Subject Areas: Bridges and other structures; Marine Transportation;
Filing Info
- Accession Number: 00331581
- Record Type: Publication
- Source Agency: British Ship Research Association
- Report/Paper Numbers: Vol. 2 Proceeding
- Files: TRIS
- Created Date: May 21 1981 12:00AM