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Avoiding blistering and cratering in polyurethanes / Stephen Bothello in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 10 Titre : Avoiding blistering and cratering in polyurethanes Type de document : texte imprimé Auteurs : Stephen Bothello, Auteur ; Jorge Lizarraga, Auteur ; Dipesh Vyas, Auteur Année de publication : 2013 Article en page(s) : p. 10 Langues : Américain (ame) Catégories : Polyuréthanes Revêtements -- Défauts:Peinture -- Défauts Revêtements -- Finition:Peinture -- Finition Index. décimale : 667.9 Revêtements et enduits Résumé : What causes blistering and crater formation in freshly applied polyurethane topcoats, and how can these problems be avoided. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19138 [article]

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The case of the contractor who almost got floored / Raymond S. Tombaugh in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 15-21 Titre : The case of the contractor who almost got floored Type de document : texte imprimé Auteurs : Raymond S. Tombaugh, Auteur ; Richard A. Burgess, Auteur Année de publication : 2013 Article en page(s) : p. 15-21 Langues : Américain (ame) Catégories : Chimie analytique Cloquage (défauts) Matériaux cimentaires Revêtements -- Défauts:Peinture -- Défauts Revêtements -- Détérioration:Peinture -- Détérioration Revêtements -- Effets de l'humidité:Peinture -- Effet de l'humidité Revêtements de sols:Peinture de sols Index. décimale : 667.9 Revêtements et enduits Résumé : Most of the past Cases from the F-Files have focused primarily (although not exclusively) on coating failures on steel. However, coating failures can and do occur on other substrates such as aluminum, wood, and concrete, to name a few. In this case, a warehouse concrete floor coating was exhibiting blistering only a few months after installation. A large existing warehouse building was being modified to house a light manufacturing facility. The floor was constructed of concrete slabs. It was reported that there was no moisture barrier underneath the slabs. The floor coating project included removal of an original clear coating by portable centrifugai blast cleaning. The new system consisted of four coats that included an epoxy penetrating primer, an aggregate filled epoxy base coat, an epoxy grout coat, and an epoxy finish coat. It was reported that moisture vapor transmission (MVT) testing was performed by the contractor prior to the new coating installation. The testing indicated a low MVT of less than 2 lbs./1,000 square feet/24 hours. Blisters began to appear in the coating within a few months of the floor coating installation (Fig. 1). In this case, aggregate in a concrete floor, in the presence of moisture, caused blistering of the coating system. It is a relatively uncommon problem that could have easily been blamed on the contractor as mis-application of the coating, void of a thorough scientific analysis of the problem (in the field and laboratory) as well as knowledge of concrete substrates. Lets take a closer look. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19139 [article]

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Performance or preference / Dan Zienty in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 22-32 Titre : Performance or preference : City of Anoka water tank reconditioning revisited Type de document : texte imprimé Auteurs : Dan Zienty, Auteur ; Elliott Hendrickson, Auteur Année de publication : 2013 Article en page(s) : p. 22-32 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces multicouches Entretien et réparations Epoxydes Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Primaire (revêtement) Réservoirs (récipients) -- revêtements protecteurs Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : In 2003, the City of Anoka, MN, completed the reconditioning of its 400,000-gallon legged water storage tank. A two-year warranty inspection followed in 2005. The project was reported in the May 2007 issue of the JPCL.1 The significance of the project, as highlighted in the May 2007 article, was that the tank provided the opportunity to test and compare the perfor mance of three coating systems for reconditioning interior surfaces in immersion and above the high water line (the vapor area), an area that is always difficult to protect. Systems tested included two NSF-approved, AVVWA standard multi-coat systems (AVVWA ICS No. 1, a two-coat epoxy polyamide and AVVWA ICS No. 5, a moisture-cured [MCUI zinc primer/epoxy polyamide/epoxy polyamide), and a single-coat (untopcoated) MCU zinc coating recently approved by NSF but not an AWWA standard system. The 2005 inspection, as reported in the May 2007 JPCL, showed that all three systems were performing well. In 2009, the City contracted again with an engineer for a periodic inspection of the tank, including the interior surfaces. The results of the evaluation led to planning between the City and its engineer for the completion of maintenance repairs scheduled for the summer of 2011. In the end, surfaces primed with the MCU organic zinc performed best. This article summarizes the original project and 2005 warranty inspection results, then focuses on subsequent inspection, repair, and performance of the interior linings tested above the high water line. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19140 [article]

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Developments in zinc primers for corrosion protection / Pascal Verbiest in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 34-43 Titre : Developments in zinc primers for corrosion protection Type de document : texte imprimé Auteurs : Pascal Verbiest, Auteur Année de publication : 2013 Article en page(s) : p. 34-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Métaux -- Surfaces Poudres Primaire (revêtement) Revêtements protecteurs Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : Fine zinc powder was recommended for use in paints as long ago as 1840. But it is only in the past 50 years, with the development of zinc-rich paints based on synthetic and inorganic paint resins, that zinc powder has become commonly used, specifically in paints for heavy-duty corrosion protection. The main applications for coatings containing zinc are the long-term corrosion protection of industrial and marine constructions (such as steel infrastructure, pipelines, bridges, windmills, and offshore drilling platforms) and the temporary protection of steel sheets (shop primers) during newbuilding of ships. Zinc coatings are specified in standards such as ISO 12944, Norsok M-501, SSPC-Paint 20, and the new IMO Performance Standard for Protective Coatings (PSPC). Zinc primers are considered to be the most effective anti-corrosion paint systems in use and have proven their excellent performance over many decades. The thickness of the zinc primers can vary between 10 and 120 microns ; the higher the thickness and the higher the zinc powder content are in the paint, the longer the corrosion protection of the steel will last. This article reviews types of zinc powder and how they are made, types and composition of zinc primers, the corrosion protection mechanisms of zinc primers, suitable uses of the primers, and tips on application. Note de contenu : - Zinc powder : the main constituent of zinc primers - Zinc primers : types and composition - Zinc primers : corrosion protection mechanisms - Application of zinc primers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19141 [article]

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Is lead dead ? / Alison B. Kaelin in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 44-61 Titre : Is lead dead ? : A look back and a look forward at 20 years of bridge painting under the osha lead in construction interim final rule and other related standards Type de document : texte imprimé Auteurs : Alison B. Kaelin, Auteur Année de publication : 2013 Article en page(s) : p. 44-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bâtiments, travaux publics Infractions Peinture -- Teneur en plomb Plomb -- Toxicologie Statistique Index. décimale : 667.9 Revêtements et enduits Résumé : On May 4, 2013, OSHA's standard for protecting construction workers from lead exposure (29 CFR 1926.62) celebrated its 20th anniversary. Initially titled, "Lead Standard: Interim Final Rule on Lead Exposure in Construction," and now simply titled "Lead," 1926.62 was issued because of what was known at the time about the health risks of overexposure to lead—risks such as neurological disorders and reproductive problems. Despite 20 years of training and education for 1926.62 as well as enforcement of it, Occupational Safety and Health Administration (OSHA) statistical data from October 2011 through September 2012 for citations for the SIC code most commonly used for bridge painters, 1721, Painting/Paper Hanging, indicates that citations under 1926.62 remain the top regulatory finding for painting. Moreover, that finding mirrors the regulatory findings over the past 10 years. This article will report statistics on violations of 1926.62 among painting and other construction trades; summarize findings on blood lead levels and current knowledge about the health risks lead exposure poses; review 1926.62 and related regulations affecting lead exposure; and offer observations, recommendations, and questions for owners and others involved with lead paint removal on bridges and other structures. Note de contenu : - OSHA enforcement of 29 CFR 1926-62 - Blood lead levels - New studies and health effect data - Regulations : background (hen and now) - Definitions of lead in paint - HUD guidelines - Worker protection (OSHA) - Hazard communications standard - Worker certification and training (HUD/EPA) - EPA : National ambient air quality standards for lead - Clean water act (CWA) - Waste handling and disposal - Soils - Health effects and lower exposure - New sources of lead and exposure pathways - Challenges with compliance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19142 [article]

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Exploring marine applications for heat-reflective coatings / Rob Portsmouth in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 63-68 Titre : Exploring marine applications for heat-reflective coatings Type de document : texte imprimé Auteurs : Rob Portsmouth, Auteur Année de publication : 2013 Article en page(s) : p. 63-68 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bateaux -- Revêtements:Bateaux -- Peinture Economies d'énergie Efficacité énergétique Gaz à effet de serre -- Réduction Photocatalyse Pigments Réflectance Réflectivité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : The sun's energy, when absorbed by exterior surfaces, can transfer through to the interior of a building, vessel, or vehicle, raising the internal temperature. This increased temperature can make the interior more unconfortable and place heavy loads on air conditioning or coolings systems. These effects, in turn, can lead to a rise in associated energy consumption, as well as in carbon dioxide and greenhouse gas emissions. Solar reflective coatings are an economical, easy-to-use, and increasingly popular way to helping to prevent all of these effects. This article describes the background to this technology and then discusses the potential advantages to be gained by using this in the marine coatings sector. Note de contenu : - Emerging standards for solar reflectance - Maritime requirements for energy efficiency - Infrared reflecting pigments help deliver choice - Reduced thermal cycling - Potential benefits in the marine sector Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19143 [article]

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Why surface preparation is important in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 5 (05/2013) . - p. 71-75 Titre : Why surface preparation is important Type de document : texte imprimé Année de publication : 2013 Article en page(s) : p. 71-75 Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Métaux -- Revêtements protecteurs Métaux -- Revêtements:Métaux -- Peinture Métaux -- Surfaces Polymères Traitement de surface par impact Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings experts often say that surface preparation of a steel surface is the most important part of a coating system. By this they mean that surface preparation affects the performance of the coating more than any other variable. Given that the proper coating system has been selected, if the surface preparation is poor, coating performance will often be compromised, even when the application is perfect. If surface preparation is good, then the coating applied over it is likely to perform well. For you, the applicator, it is useful to know why surface preparation is so important, because knowing why can help you do a better job. The following discussion focuses on the preparation of steel, but the concepts apply to other substrates as well. Note de contenu : - Surface preparation is a foundation - Overcoming the negative of slipperiness - Overcoming the negative of debris - Non-visible contaminants - Degrees of separation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19144 [article]

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Journal of Protective Coatings Technology - Vol. 30, N° 5 URL