Corrosion behaviour of mooring chain steel in seawater
conference paper
Failures of mooring lines on floating production, storage and offloading systems (FPSOs) raise concern to the offshore industry. Localized corrosion of mooring chain is regarded as one of main failure mechanisms. The project of Localized Mooring Chain Corrosion (LMCC) is aiming at studying the mechanism of local corrosion on mooring chain steel in seawater and searching for corresponding mitigation methods. As part of the LMCC project, the corrosion behavior is studied of chain steel in artificial seawater and artificial seawater containing microorganisms which were collected from the application site and cultured in the Endures lab. The corrosion behavior of chain steel was studied using polarization and impedance measurements. The microstructures of the chain steel and corrosion morphology were investigated using SEM and epifluorescent methods. Localized corrosion has been found for the steel in the seawater. Inclusions, such as MnS found in the chain steel, play an important role in the local corrosion initiation.
TNO Identifier
567416
Source title
67th Annual Meeting of the International Society of Electrochemistry, 21-26 August 2016, The Hague, The Netherlands
Collation
15 p.
Files
To receive the publication files, please send an e-mail request to TNO Repository.