Localized corrosion of mooring chain steel in seawater

Corrosion of mooring chains is regarded as one of main threats to the offshore mooring systems. Localized corrosion is even more dangerous than uniform corrosion because it may not show significant mass loss but it can cause stress concentration and initiate cracks under force, leading to accelerated degradation of mooring chains. Localized...

Corrosion behaviour of mooring chain steel in seawater

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...

Ship ballast tanks a review from microbial corrosion and electrochemical point of view

Microbiologically Influenced Corrosion (MIC) is the term used for the phenomenon in which corrosion is initiated and/or accelerated by the activities of microorganisms. MIC is a very serious problem for the ship industry as it reduces structural lifetime in combination with safety risks for crewmembers or inspection personal and increases...

Study of MIC impact in a full-scale ship ballast tank

Microbiologically influenced corrosion (MIC) of steel is a serious problem in the marine environment and many industries, such as the shipping industry. While electrochemical measurements such as impedance have been used in corrosion monitoring for several years, the true capabilities of the technique and the optimal methodology for extracting...

Inspection and in situ impedance measurements for ballast water tanks

The application of coatings in ballast water tanks is critical for the safety of cargo ships. International Maritime Organization (IMO) has delivered a standard for the protection of water ballast tanks in which new built cargo vessels have to comply with {resolution MSC.215(82)}. In case the procedure of applying coatings differs from the IMO...

Exopolysaccharides (EPS) as anti-corrosive additives for coatings

Exopolysaccharides (EPS) are a class of renewable polymers that show interesting anti-corrosive properties and could potentially be used as an alternative for zinc phosphates. When combined with a waterborne styrene-acrylic polymer dispersion (SA-1), exopolysaccharides were shown to give an improvement in the anti-corrosive performance....

A new approach to study local corrosion processes on steel surfaces by combining different microscopic techniques

Corrosion studies of materials on the micro or even nano-scale level are cumbersome due to instrumental limitations and handling procedures. If biological processes are involved the spatial resolution is even more important and sample preparation is usually the limitation. Attachment of bacteria on stainless steel surface is a complex...

EIS study of MIC in three different zones derived from ship ballast tank model system

Microbiologically influenced corrosion (MIC) is a well known phenomenon in aquatic environments [1]. The presence of a biofilm on metal surface often establishes new electrochemical reaction pathways, or promotes reactions which are not normally favored in the absence of microorganisms, resulting in increased corrosion rates and on the...