Investigation of severe corrosion of mooring chain in West African waters

A. E. Potts, Emmanuel Fontaine, Robert Melchers

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

Abstract

Recent detailed observations of the performance of mooring chains for a floating production unit in tropical West African waters have shown severe localized corrosion (pitting) of the steel chain after only seven years of use. This paper describes the investigation of this phenomenon as part of the Joint Industry Paper (JIP) research program SCORCH (Seawater Corrosion of Rope and Chain) funded by the major oil companies, most Classification Societies and various offshore operators and manufacturers. It is shown that there is a high likelihood that the chain has been subjected to microbiology influenced corrosion (MIC) as a result of the elevated levels of water pollution in the operational area. However, despite the large localized loss of steel in corrosion pots, the breaking load shows only a relatively small reduction compared to the Minimum Breaking Load specified in design guidelines.

Original languageEnglish
Title of host publicationAnnual Conference of the Australasian Corrosion Association 2012
Subtitle of host publication11-14 November 2012, Melbourne, Victoria [proceedings]
Place of PublicationKerrimiur, Victoria, Australia
PublisherAustralian Corrosion Association
Pages992-1001
Number of pages10
ISBN (Print)9781622769698
Publication statusPublished - 2012
Externally publishedYes
EventAustralasian Corrosion Association (ACA) Conference 2012: Corrosion and Prevention - Crown Conference Centre, Melbourne, Australia
Duration: 11 Nov 201214 Nov 2012

Conference

ConferenceAustralasian Corrosion Association (ACA) Conference 2012
Abbreviated titleCP 2012
CountryAustralia
CityMelbourne
Period11/11/1214/11/12
OtherCorrosion Management for a Sustainable World: Transport, Energy, Mining, Life Extension and Modelling

Keywords

  • Corrosion
  • MIC
  • Microbiological influences
  • Mooring chain
  • Mooring integrity
  • Pitting
  • Reliability

Cite this