Anode consumption on a subsea X-mas tree
Abstract
Anode consumption and coating breakdown on a X-mas tree installed at the Troll Field in the Norwegian North Sea was investigated after 5 years. A comparison with a spare tree and one tree being exposed for only 3--4 months was done. The epoxy coating has several blisters, in particular on stainless steel surfaces. Water inside the blisters has a pH of 13-14 indicating that the cathodic reaction occurs inside them. The anode dimensions indicate an overall anode consumption of approximately 20%, while the design allows 27% after 5 years. This indicates that the original design is quite conservative. If the design had been done according to present day design rules, the conservatism would be reduced; an overall anode consumption of 23% is then likely (still less than allowed 27%).
- Authors:
-
- Norsk Hydro Research Centre, Porsgrunn (Norway)
- Publication Date:
- OSTI Identifier:
- 352566
- Report Number(s):
- CONF-980316-
TRN: IM9928%%160
- Resource Type:
- Conference
- Resource Relation:
- Conference: Corrosion `98, San Diego, CA (United States), 22-27 Mar 1998; Other Information: PBD: 1998; Related Information: Is Part Of Corrosion `98: 53. annual conference and exposition, proceedings; PB: [6600] p.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 03 NATURAL GAS; CATHODIC PROTECTION; NATURAL GAS FIELDS; FIELD PRODUCTION EQUIPMENT; NATURAL GAS WELLS; ANODES; PROTECTIVE COATINGS; OFFSHORE PLATFORMS; EPOXIDES; STAINLESS STEELS
Citation Formats
Lye, R E. Anode consumption on a subsea X-mas tree. United States: N. p., 1998.
Web.
Lye, R E. Anode consumption on a subsea X-mas tree. United States.
Lye, R E. 1998.
"Anode consumption on a subsea X-mas tree". United States.
@article{osti_352566,
title = {Anode consumption on a subsea X-mas tree},
author = {Lye, R E},
abstractNote = {Anode consumption and coating breakdown on a X-mas tree installed at the Troll Field in the Norwegian North Sea was investigated after 5 years. A comparison with a spare tree and one tree being exposed for only 3--4 months was done. The epoxy coating has several blisters, in particular on stainless steel surfaces. Water inside the blisters has a pH of 13-14 indicating that the cathodic reaction occurs inside them. The anode dimensions indicate an overall anode consumption of approximately 20%, while the design allows 27% after 5 years. This indicates that the original design is quite conservative. If the design had been done according to present day design rules, the conservatism would be reduced; an overall anode consumption of 23% is then likely (still less than allowed 27%).},
doi = {},
url = {https://www.osti.gov/biblio/352566},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1998},
month = {Thu Dec 31 00:00:00 EST 1998}
}