The Polatrak V-String electrode by Deepwater Corrosion Services is a low-cost zinc reference electrode designed for offshore platform and pipeline monitoring. The ultra-rugged construction and ease of installation make this a viable tool for CP retrofit monitoring or to supplement other Polatrak monitoring instruments.

Accuracy is ± 0.02V, which is adequate for a general performance monitor.

The electrode wire typically consists of a galvanized steel aircraft cord with a PVC jacket and an over-braid of polyester fibers. This combination makes the electrode virtually indestructible.

Offshore platform jackets & drill rigs.

Seawater ballast banks on SPAR, TLP, and FSU / FPSO structures.

Risers.

Inshore structures, piers, jetties, wharves.

Inside J-tubes or in tight spaces where CP has to be monitored.

Low cost and ease of installation allow many more reference points to be sampled.

Low profile and lack of welded attachments allow electrode location in node crotches, inside annular spaces, and on pipelines and risers.

Lack of a copper cable allows the electrode element to polarize any pinhole or small defects in the conductor, keeping the electrode serviceable.

Steel cable can be literally tied like a rope to subsea members and will not abrade, making V-String perfect for low cost monitoring system retrofits.

V-String reference electrode in situ on

a retrofitted CP monitoring system.

V-String reference electrode and RetroClamp™ assembly.

Specifications V-String reference electrode in situ on a pipeline, held in place with RetroClamp™.

V-String conductor: galvanized or stainless steel wire with PVC or nylon coating per MIL SPEC

Illustration of preformed small-cord cable and strands, 1x19 class. A flexible strand of 19 wires, as generally used for yachting and guy-wire purposes.

 

Diameter, inches	Lbs per 1000 ft	Breaking strength, lbs
1/16 3/32 1/8 5/32 3/16 1/4 5/16 3/18	8.5 20 35 55 77 135 310 300	500 1,200 2,100 3,300 4,700 8,200 12,500 18,000