Behavior of biocide-free foul control paints for ships’ hulls in the immediate proximity of ICCP anodes / F. Castelli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 383-399 Titre : Behavior of biocide-free foul control paints for ships’ hulls in the immediate proximity of ICCP anodes Type de document : texte imprimé Auteurs : F. Castelli, Auteur ; M. Delucchi, Auteur ; F. Valenza, Auteur ; F. Garaventa, Auteur ; M. Faimali, Auteur ; T. Turturro, Auteur ; A. Benedetti, Auteur Année de publication : 2024 Article en page(s) : p. 383-399 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coques (architecture navale) Fluoropolymères pH Revêtement autopolissant Revêtements antisalissures:Peinture antisalissures Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Impressed current cathodic protection systems are used in combination with organic coatings to prevent corrosion of hulls. The reaction species which are formed in the proximity of the anodes, like chlorinated compounds and acidity, can stress the antifouling paints of the protective coating system. A 3 × 3 matrix was defined to drive the tests aiming to investigate the behavior of novel biocide-free foul release (FR) and self-polishing (SP) paints under this kind of attack. The matrix was featured by different pH and free chlorine (free-Cl) values derived by a galvanostatic test performed at an anodic current density required for the protection of paints roughly at their mid age. Chemical/physical characterization was performed through visual analysis, thickness measurements, profilometry, contact angle measurements, and FTIR-ATR analysis. Both FR and SP paints underwent adhesive failure only in the harshest conditions, pH = 3/free-Cl 3–6 ppm, with unmodified chemistry of the polymers. Both paints exhibited no detachment in milder pH/free-Cl conditions, but thickness and contact angle reduction were observed. Finally, results were discussed inferring possible behaviors of the tested paints in real applications. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS : Determination of the pH/free-Cl conditions - Maintenance of the pH/free-Cl conditions - Evaluation of the physical and chemical properties of the paint systems - SUMMARY OF THE RESULTS - DISCUSSION : Thickness reduction, blistering, and detachment - Contact angle, profilometry - Interpretation of the results in the framework of real applications - Table 1 : Binder and dry film thickness (DFT) of the coats composing the FR and SP coating systems - Table 2 : Sa values by profilometry on SP and FR paints before/after the chemical treatments DOI : https://doi.org/10.1007/s11998-023-00830-2 En ligne : https://drive.google.com/file/d/1qN6gSQmmpiGLNc11MA1UjZXcNbrCWrsG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40460 [article]

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Mitigation of marine fouling growth through TBT free antifouling coating - A review / Nirmalya Dey in PAINTINDIA, Vol. LXI, N° 11 (11/2011)

[article]  inPAINTINDIA > Vol. LXI, N° 11 (11/2011) . - p. 61-67 Titre : Mitigation of marine fouling growth through TBT free antifouling coating - A review Type de document : texte imprimé Auteurs : Nirmalya Dey, Auteur Année de publication : 2011 Article en page(s) : p. 61-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Copolymères Revêtement autopolissant Revêtements antisalissures:Peinture antisalissures Salissures marines Tributylétain -- Suppression ou remplacement Index. décimale : 667.9 Revêtements et enduits Résumé : Foulings of marine crafts led to the development and widespread use of antifouling paints in the hulls of boats and ships. Fouling costs shipping industry approximately $ 3 billion per annum. Conventional antifouling paints with tributyltin based toxin have served the industry for past 2-3 decades with excellent performance and track record. However antifouling coatings based on organotin compounds possess a world-wide threat to the aquatic environment due to which International Maritime Organization (IMO) have imposed ban on the presence of tin on seagoing vessel effective 2008. This had led to the evolution of several new generation nontoxic environmentally safe antifouling coating systems. Globally researchers and scientists have approached technically in different ways to develop more eco-friendly antifouling coatings. This paper reviews the process of bio-foulings on ships' underhull and the categories of different TBT free anti-fouling-paints. Note de contenu : - PROCESS OF MARINE BIO FOULINGS - PARAMETERS EFFECT ON BIO FOULING GROWTH : Geographical location - Operating pattern of the vessel/speed - Temperature of water - Salinity/pH/alkalinity - Pollution and oil-grease contamination in coastal water - Review of conventional anti-fouling paint - Soluble matrix type-first generation antifouling - Diffusion or, insoluble matrix type or, contact leaching, second generation antifouling - Controlled depletion type (CDP) third generation antifouling - TBT based self-polishing copolymer (SPC)- fourth generation antifoulings - NEW GENERATION TIN FREE ANTIFOULING : TBT free self-polishing copolymer (SPC) - Biocidal free foul release Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13822 [article]

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Preparation of PEO/polymer coatings on aluminum alloy with antifouling properties / Ulyana Kharchenko in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 763-779 Titre : Preparation of PEO/polymer coatings on aluminum alloy with antifouling properties Type de document : texte imprimé Auteurs : Ulyana Kharchenko, Auteur ; I. Beleneva, Auteur ; V. Egorkin, Auteur ; I. Vyalyi, Auteur ; N. Izotov, Auteur ; A. T. Tsvetnikov, Auteur ; A. Karpenko, Auteur ; Chi V. Nguyen, Auteur Année de publication : 2023 Article en page(s) : p. 763-779 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bactéries Caractérisation Electrochimie Métaux -- Revêtements protecteurs Microcapsules Polyacryliques Polyènes Polyène est le nom générique des composés organiques polyinsaturés qui possèdent au moins 2 doubles liaisons carbone-carbone et au moins 5 carbones. Polyéthylène glycol Polytétrafluoréthylène Produits naturels Revêtement autopolissant Revêtements -- Propriétés mécaniques Revêtements antisalissures Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : A study on the development of an effective composition of polymeric antifouling coating based on acrylic copolymer with microencapsulated extract of natural origin and superdispersed polytetrafluoroethylene was carried out. A Raman spectroscopy study of the bacterial extract composition showed that the main component was a polyene pigment with 5 conjugated bonds. Encapsulation of ethyl acetate extract of Pseudoalteromonas piscicida 2202 was carried out, two types of microcapsules containing the microbial extract were obtained, and their morphology and efficiency of antifouling action in the coating were studied. Comprehensive studies of antifouling, anticorrosion, and mechanical properties of the coatings allowed identification of the most effective composition providing long-term protection in combination with satisfactory mechanical properties. It is shown that the use of silica nanocapsules with microbial extract in the coating is more effective for enhanced antifouling and mechanical performance. Note de contenu : MATERIALS AND METHODS : Materials - PEO process - Preparation of bacterial extract - Raman spectroscopy of P. piscicida 2202 extract - Encapsulation of P. piscicida 2202 extract in silica nanocapsules and poly(urea–formaldehyde) microcapsules - Preparation of organic topcoat - Field tests - Electrochemical study - Mechanical properties measurements - Surface characterization - RESULTS AND DISCUSSION : Characterization of bacterial extract by Raman spectroscopy - Characterization of SiNCs and PUF-microcapsules - Field immersion - Electrochemical measurements - Mechanical performance of paints - Comparative evaluation of coatings - Table 1 : Table 1 Composition of prepared coatings DOI : https://doi.org/10.1007/s11998-022-00706-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00706-x.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39317 [article]

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Self-polishing anti-fouling marine coatings / Dhanalaxmi Mendon in PAINTINDIA, Vol. LXIV, N° 9 (09/2014)  

[article]  inPAINTINDIA > Vol. LXIV, N° 9 (09/2014) . - p. 61-70 Titre : Self-polishing anti-fouling marine coatings Type de document : texte imprimé Auteurs : Dhanalaxmi Mendon, Auteur Année de publication : 2014 Article en page(s) : p. 61-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère acrylate de zinc Revêtement autopolissant Revêtements antisalissures:Peinture antisalissures Index. décimale : 667.9 Revêtements et enduits Résumé : Bio-fouling on ship hulls is prevented by the use of antifouling paints. Anti-fouling has various mechanisms of which self-polishing types is receiving a great deal of attention world wide. The progressive abandonment of TBT self-polishing technology all over the world has led to the necessity of exploring new TBT-free i.e. environmentally safe horizons. The new metal-acrylate TBT-free systems are finding a new insight in this field where such coatings have found to be lasting for around 5 years. The foul release systems are the most attractive environmentally since they do not use biocides. Although they are considerably more expensive, they are now being used on fast vessel type, which are able to exploit the smoothness & that this technology will become increasingly important for control of fouling in the 21st century. Note de contenu : - THE SUCCESS OF TBT IS DUE TO FOLLOWING FACTORS - REQUIREMENTS FOR AN OPTIMAL ANTI-FOULING COATING : Alternatives to TBT-free coatings - Foul-release coating advantages/disadvantages - Tin-free self-polishing co-polymer (SPC) - Metal-acrylate TBT-free self polishing coatings (Cu-, Zn-Sl-Acrylate system) - Ionic exchange mechanism in zinc acrylate system (latest technology) - Zinc acrylate copolymers - Advantages of self-polishing coatings - NEW DEVELOPMENTS IN TBT-FREE ANTIFOULING TECHNOLOGY : Tin-free controlled depletion paints (CDPs) - Tin-free biocide containing self-polishing paints (TF-SPCs) - Future Technology En ligne : https://drive.google.com/file/d/1ODz3V70_8OnW0cAJWnRrE-Kk31SZrRw9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22486 [article]

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