Microbially-influenced corrosion in double-hull tankers. A scoping paper
New ISBN 9780852933336
Old ISBN 0852933339
Date Published: April 2001
Published by: Energy Institute
One consequence of the Exxon Valdez Oil Spill in Alaska was the requirement that all new oil tankers should be built with double hulls. Whilst this has the obvious potential of reducing the likelihood of a catastrophic spill, there is a view that it has resulted in increased corrosion within the crude oil cargo tanks of these vessels when compared with single hull counterparts. The underlying cause of corrosion has been identified in many cases as being due to microbial activity, both pitting of tank bottoms by sulphate reducing bacteria and corrosion of the undersides of deck plates by sulphate oxidising bacteria.
This scoping paper reviews the available information on the operation and corrosion of tankers and extends the findings to Floating Production Storage and Offloading Units (FPSOs). It aims to provide a critique on whether the data support the various theories on MIC in double hull tankers.