LIPRA
Polymerisable ionic liquid for antifouling and anticorrosion coating
Since 2014
Exemple de fouling se formant sur l’élice d’un bateau
Project summary :
To develop a new ecofriendly antifouling coating, metal free and exempt from potential toxic substance for marine environment.
Partners
- Fiancial backers
- Project members
Context
Integrating MRE projects in the French energy mix drives the different actors (SMEs, industrialists, researchers and academics) to meet new challenges, including those of the lifetime of metallic structures immerged in seawater, price competitiveness of MRE and the toxicity for the marine environment of anticorrosion and antifouling protection systems.
Indeed, the marine environment is an extremely aggressive environment for submerged (tidal) and semi-submerged structures (offshore wind turbines): the environment is corrosive (presence of chloride ions, sulfates, etc. and bacteria incriminated in Microbiologically Influenced Corrosion) and the presence of limestone, calcium or magnesium forms a deposit on the structure, the accumulation of algae and shells hinders maintenance operations, reduces turbines’ efficiency and makes structures heavier, etc.. These factors have a significant impact on the performance and lifetime of structures, generate high operating and maintenance costs, and are an obstacle to the exploitation of these technologies.
Furthermore, the arrival of REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) in 2007, has upset the market of biocides and antifouling paints. Indeed, REACH aims to control potential risks of chemicals on Humans and Environment, whose molecules used in biocides. In this context, all biocides are subject to a marketing authorization, following the evaluation of the toxicity of molecules that compose them, their rate of degradation, or their ecotoxicity on marine environment. After studies, some molecules have been forbidden to be placed on the European market (for example: the cybutryne, widely used in antifouling coatings for its biocides properties, was banned in January 2016 by the European Commission[1]). Others have not yet been approved and have been included in the Review Program. If biocides, compounds of these substances, have a temporary marketing authorization, pending the conclusion of that review, it means that some products may be finally prohibited after this period. This therefore results in a mutation of the market of biocides products and antifouling paints, in order to anticipate the prohibition of certain substances.
[1] European decision on Cybutryne
Objective
The LIPRA project, for Polymerisable ionic liquid for antifouling and anticorrosion coating, initiate by the Laboratoire de Chimie Moléculaire et Thioorganique LCMT (which is a major actor in the domain of molecular and macromolecular chemistry), in partnership with the Biologie des Organismes et Ecosystèmes Aquatiques laboratory BOREA and Corrodys, aims to develop a new antifouling and anticorrosion coating with a specific requirements specification: being anticorrosive, with bactericide and fungal properties, economically viable, with a sufficient lifetime, abrasion, erosion and biodeterioration resistant, and above all, ecofriendly.
Corrodys’ role
In this innovative project, Corrodys will afford its experience and expertise in fouling and biofouling identification, then will study the applicability and physic properties of the new coating and its anticorrosion and antifouling performances. Corrodys will finally provide aging test in seawater to check an enough lifetime of the coating within tough conditions.
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