Field testing of CP current requirements at depths down to 1300m on the Norwegian continental shelf from 63 to 67 {degree} N
Conference
·
OSTI ID:20002595
On the Norwegian Continental Shelf exploration has started in the area of the shelf between 63 and 67 N for water depths down to 1,500m. A field-testing program has been performed at depths from 100m down to 1,300m, which covered exposures at the blocks Helland Hansen, Moere West, Ormen Lange, Vema/Nyk and Gjallar. Testing has been done to establish the CP current demand for C- steel, thermally sprayed aluminium, stainless steel (6 Mo) and titanium (grade 5). The initial current demand in the zone from 100m down to 200m was found to be especially high ({gt} 0.22 A/m{sup 2}). While at depths from 600m and down to 1,300m depth an initial design current density of 0.22 A/m{sup 2} resulted in a polarization to the protective potential on C-steel within a two-month period.
- Research Organization:
- Marintek, Sandefjord (NO)
- OSTI ID:
- 20002595
- Report Number(s):
- CONF-990401--
- Country of Publication:
- United States
- Language:
- English
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