Repair Welding of Arctic Offshore Structures and Vesselsby H. B. Luft, Univ of Alberta, Cent for Frontier, Engineering Research, Edmonton, Alberta, Can,
R. Witzke, Univ of Alberta, Cent for Frontier, Engineering Research, Edmonton, Alberta, Can,
I. Smuga-Otto, Univ of Alberta, Cent for Frontier, Engineering Research, Edmonton, Alberta, Can,
Abstract: This paper describes the welding procedure development for repair or field modifications of offshore drilling structures and vessels made with several different steel grades produced for operating in low temperature and ice-infested environments. The welding process considered is the shielded metal arc method and welding is assumed to occur at minus 30 degree C ambient temperatures. To improve weldment toughness without post heat treatment a temper-bead technique is being incorporated into the welding procedure development. General and localized corrosion activity is being monitored including the use of a modified scanning reference electrode technique to measure electrochemical potential differences between the weldment and base metal.
Subject Headings: Offshore structures | Welding | Rehabilitation | Ships | Metals (material) | Steel structures | Offshore drilling | Toughness | Arctic
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