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Use of copper-based antifouling paint / Neal Blossom in COATINGS TECH, Vol. 15, N° 3 (03/2018)  

[article]  inCOATINGS TECH > Vol. 15, N° 3 (03/2018) . - p. 63-68 Titre : Use of copper-based antifouling paint : AU.S regulatory update Type de document : texte imprimé Auteurs : Neal Blossom, Auteur ; Frank Szafranski, Auteur ; Rudolf Lotz, Auteur Année de publication : 2018 Article en page(s) : p. 63-68 Note générale : Notes Langues : Américain (ame) Catégories : Cuivre Peinture -- Industrie -- Législation -- Etats-Unis Revêtements antisalissures:Peinture antisalissures Index. décimale : 667.9 Revêtements et enduits Résumé : The efficacy of the active biocide ingredients used in antifouling bottom paint to contain and impede the growth of biofouling on boat hulls is of global economic concern, given that costs associated with mitigating the damage caused by invasive species are escalating, especially in coastal waters where fouling nutrients are concentrated. The efficacy of an antifouling coating depends on site-specific fouling pressure where the vessel operates, which blocide(s) are used in the formulation, and the biocidal release rate from the painted surface to the ambient water. Coatings formulated with cuprous oxide have been around for at least 100 years, and are applied to an estimated 90% of the world's vessels whose hulls are protected with biofouling control coatings. Historically, copper has been repeatedly challenged and subsequently reviewed for its risk and effectiveness, and is arguably the most researched substance for toxicity in the marine environment. Likewise, copper-based antifouling paint has been repeatedly tested for efficacy in hundreds of coatings formulations by multiple manufacturers. Therefore, it is not unreasonable to characterize copper-based antifouling coatings as proven technology. Note de contenu : - RECENTS DEVELOPMENTS : California's AB 425-2013 - California's AB 425-2013 - California's Marina Del Rey Total Maximum Daily Load (TMDL) - Amendment to the California State lands Commission's biofouling management regulations for vessels arriving at California Ports - U.S EPA ACCEPTING COMMENTS ON DRAFT COPPER RISK ASSESSMENT - U.S. EPA INVESTIGATING AN IMPROVED METHOD TO ESTABLISH SITE-SPECIFIC OBJECTIVES - REGULATORY DISPARITY En ligne : https://drive.google.com/file/d/1E_CIMJsYQGLfx5tGezdMnmUzB65OmmoD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30311 [article]

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Convective flow and defects / Clifford K. Schoff in COATINGS TECH, Vol. 15, N° 3 (03/2018)  

[article]  inCOATINGS TECH > Vol. 15, N° 3 (03/2018) . - p. 76 Titre : Convective flow and defects Type de document : texte imprimé Auteurs : Clifford K. Schoff, Auteur Année de publication : 2018 Article en page(s) : p. 76 Langues : Américain (ame) Catégories : Revêtement -- Séchage:Peinture -- Séchage Revêtements -- Défauts:Peinture -- Défauts Index. décimale : 667.9 Revêtements et enduits Résumé : After a coating is applied, there is a period when the film is still liquid. Evaporation of solvent or water cools the surface and entry into an oven heats the surface. In either case, a combination of density and surface tension differences can cause convective flow within the film as shown in Figure 1. Material moves from the coating-substrate interface, rises to the surface, then drops back down. The motion continues until the coating has dried or cured enough to raise the viscosity to a level that stops flow. In multi-pigment systems, one of the pigments rising with the flow may be trapped at the surface producing the defects called flooding and floating. If that pigment completely covers the surface or has become the major component of the pigment mix at the surface, the result is a darker or lighter shade of uniform color. We usually call this flooding. Rubbing the wet paint with a finger (known as rub-up) will show that the surface color is different from the interior of the layer. Partial coverage by one pigment resulting in ugly streaks or mottled regions is called floating, although both defects sometimes are labeled as floating since, in both cases, pigment is floating to the surface. Flooding and floating both produce unacceptable color effects. Note de contenu : - Fig. 1 : Diagram of convective flow showing the up and down pattern of motion - Fig. 2 : Example of a network of Bénard cells - Fig. 3 : Bénard cells in a white can coating En ligne : https://drive.google.com/file/d/1GOTN5P9DIU2ogYQEXOQxaf0J6b1yBfZA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30628 [article]

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Coatings Tech Vol. 15, N° 3 URL