MICROBIOLOGICAL PITTING CORROSION: OLD PROBLEMS IN NEW PLACES - MECHANISMS, RECOGNITION AND CONTROL

All common metals, even stainless steel, can suffer from microbially enhanced corrosion. This is a well documented phenomenon and has affected the marine industry spasmodically. In recent years very severe pitting corrosion has occurred regularly in the bottom plates of in-shore vessels, in the worst cases perforating the hull. It is believed to have been accelerated by the proliferation of micro-organisms, particularly sulphate reducing bacteria, in the bilge water. The increase in the number of incidents is believed to be a direct consequence of the regulations and costs which have led to a reduced frequency of bilge discharge. However there are also well documented incidents of hull perforation in offshore vessels, attributed to design features which trap pockets of stagnant bilge water, and of severe corrosion in ballast and slop tanks. There are three elements to all antimicrobial strategies namely improved design, avoidance measures and remedial actions. All should be considered with full regard to environmental and health issues. Their success or otherwise can be monitored by simple on board tests.

  • Supplemental Notes:
    • RINA Intl Conf on Marine Corrosion Prevention a Re-appraisal for the Next Decade; 11-12 Oct 1994; London, UK. Pprs. Publ by RINA, London, UK. Ppr 7 [8 p, 4 ref, 2 fig]
  • Authors:
    • Hill, E C
    • Hill, G C
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00718331
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM