C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
204/120, 204/186
C23F 13/00 (2006.01) C23F 13/02 (2006.01)
Patent
CA 1137444
ABSTRACT: The invention provides a submergeable structure provided with cathodic protection means comprising a flexible impressed current anode assembly including an elongate electrode wound around a support to provide an anodic region and rope extensions extending from the anodic region in at least two different directions, said extensions being secured to the structure so as to space the anodic region from metal of the structure to be protected. In addition, the invention includes an impressed current anode assembly suitable for use as the above defined cathodic protection means and having an anodic region comprising an elongate electrode wound around an insulating rope which passes through the anodic region and extends therefrom in at least two different directions. A particularly useful anode assembly in accordance with the invention includes platinised titanium or niobium wire (prefer- ably copper-cored) for the electrode(s) helically wound around a rope of polyester or polypropylene. Regardless of the structure of the anode assembly, a plurality of assemblies in accordance with the invention may be assembled using a harness system to provide an impressed current anode system for cathodic protec- tion of a submerged structure. The invention also relates to a new design of reference electrode which may be used with the anode assembly of the inven- tion. The invention has particular utility in cathodic protec- tion of oil rigs.
343950
Lowe Richard A.
Warne Michael A.
Constructors John Brown Limited
Imi Marston Limited
Ridout & Maybee Llp
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