The Fatigue Performance of Welded Joints in a Marine Environment

by O. Vosikovsky, COMSRG, Canada,
M. J. Pates, COMSRG, Canada,



Document Type: Proceeding Paper

Part of: Structural Materials

Abstract:

The fatigue lives of plate-plate, pipe-plate, and tubular welded joints tested in seawater under free corrosion, optimum cathodic protection and cathodic overprotection measured in the Canadian offshore steel research program, and similar European and Japanese programs, are reviewed. Current beliefs, reflected in offshore fatigue design codes, that adequate cathodic protection restores the life in seawater to that measured in air, are not supported by experiments. Cathodic protection, as compared to free corrosion, provides improvement in the long fatigue lives of plate-plate joints. However, this trend is not observed in tests of tubular joints.

Subject Headings: Fatigue tests | Welded connections | Offshore structures | Cathodic protection | Joints | Plates | Pipe joints

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