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51314-4392-Novel Fouling Release Technology – Redefining Fouling Control

Product Number: 51314-4392-SG
ISBN: 4392 2014 CP
Author: Jakov Radenovic
Publication Date: 2014
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Fouling is unwanted growth of biological material - microorganisms barnacles and algae - on immersed surfaces. Even thin layers of microbial slime will have a measurable effect in the fuel efficiency(1). Vessel bottoms that are not protected may gather 150 kg of fouling/m2 in less than six months. On a VLCC this would add approx. 6000 tonnes of fouling(2). FPSO’s   are static and the rate of fouling could be much higher depending on the fouling intensity of the waters(3).For the past decade there were two ways to combat fouling:1. Conventional biocide based antifouling coatings - depends on a surface erosion process to maintain biocide release to deter fouling. 2. Fouling Release coatings with smooth surface. This technology combines non-fouling properties with easy release of any fouling that eventually settles.Hempel pioneered the use of low surface friction coatings solutions in the1970s. In 2008 Hempel launched the most efficient Fouling Release product by adapting biomedical non-fouling technology to the marine fouling problem: hydrogels.This paper presents a novel coating technology based on the fusion hydrogel-based Fouling Release coatings and biocide-based antifouling coatings. The biocide release mechanism presented in this paper differs significantly from those of conventional self-polishing coatings which explains the unprecedented levels of antifouling protection regardless of the exposure conditions:• Ultralow roughness & low friction• Effective fouling protection combining physical and chemical mechanisms• Biocide release rates independent of sailing speed – static/dynamic protection• Low VOC low biocide content 100% Cu2O free. Reduction SOx and NOx from trading ships 1 Schultz M. P. Effects of coating roughness and biofouling on ship resistance/powering2 Focus on IMO Anti-fouling systems 20023 Apolinario M. and Coutinho R. (2009). Understanding the biofouling of offshore and deep-sea structures. C. Yebra D.M. Advances in marine antifouling technologies 
Fouling is unwanted growth of biological material - microorganisms barnacles and algae - on immersed surfaces. Even thin layers of microbial slime will have a measurable effect in the fuel efficiency(1). Vessel bottoms that are not protected may gather 150 kg of fouling/m2 in less than six months. On a VLCC this would add approx. 6000 tonnes of fouling(2). FPSO’s   are static and the rate of fouling could be much higher depending on the fouling intensity of the waters(3).For the past decade there were two ways to combat fouling:1. Conventional biocide based antifouling coatings - depends on a surface erosion process to maintain biocide release to deter fouling. 2. Fouling Release coatings with smooth surface. This technology combines non-fouling properties with easy release of any fouling that eventually settles.Hempel pioneered the use of low surface friction coatings solutions in the1970s. In 2008 Hempel launched the most efficient Fouling Release product by adapting biomedical non-fouling technology to the marine fouling problem: hydrogels.This paper presents a novel coating technology based on the fusion hydrogel-based Fouling Release coatings and biocide-based antifouling coatings. The biocide release mechanism presented in this paper differs significantly from those of conventional self-polishing coatings which explains the unprecedented levels of antifouling protection regardless of the exposure conditions:• Ultralow roughness & low friction• Effective fouling protection combining physical and chemical mechanisms• Biocide release rates independent of sailing speed – static/dynamic protection• Low VOC low biocide content 100% Cu2O free. Reduction SOx and NOx from trading ships 1 Schultz M. P. Effects of coating roughness and biofouling on ship resistance/powering2 Focus on IMO Anti-fouling systems 20023 Apolinario M. and Coutinho R. (2009). Understanding the biofouling of offshore and deep-sea structures. C. Yebra D.M. Advances in marine antifouling technologies 
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