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Watching paint dry : not as simple as it sounds / Troy E. Fraebel in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 8 (08/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 8 (08/2018) . - p. 10-14 Titre : Watching paint dry : not as simple as it sounds Type de document : texte imprimé Auteurs : Troy E. Fraebel, Auteur Année de publication : 2018 Article en page(s) : p. 10-14 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion Expertises Peinture -- Législation Revêtements -- Analyse:Peinture -- Analyse Revêtements -- Application-dosage:Peinture -- Application-dosage Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Over the last 30 years, I have been asked by numerous people, including my children, what I do for a living. After trying to explain corrosion, site condition assessments, coating system selection, specification writing, inspection and training, I default to a standard answer that I'm sure many readers have used: "I watch paint dry." While it may truly seem simple to someone outside of the protective coating business, I have spent years helping engineers, architects and owners understand the complexities of coating systems and the need for proper planning, specifications and inspection. Let's explore some of the aspects that have changed over the last 30 years to the compexity tof painting. Note de contenu : - Regulations - Surface preparation methods and standards - Coating technology and application methods - Inspection Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31855 [article]

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Fireosaurus rex : king of epoxy PFP in hot and cold climates / Mike O'Donoghue in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 8 (08/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 8 (08/2018) . - p. 20-30 Titre : Fireosaurus rex : king of epoxy PFP in hot and cold climates Type de document : texte imprimé Auteurs : Mike O'Donoghue, Auteur ; Vijay Datta, Auteur ; Ravi Nagarajan, Auteur ; Bill Dempster, Auteur ; Robin Wade, Auteur ; Sherman Spear, Auteur Année de publication : 2018 Article en page(s) : p. 20-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Intumescence (chimie) Polyamines Polysulfures Protection passive contre l'incendie la protection passive contre l’incendie dans les bâtiments est essentiellement préventive. Elle représente l’ensemble des mesures constructives permettant à un ouvrage ou une partie d’ouvrage de résister à un incendie pendant un temps prédéterminé fixé par la réglementation de construction en vigueur pour le type de bâtiment concerné. Ces mesures sont destinées à : stopper la progression des fumées, éviter la propagation des flammes, maintenir la stabilité au feu des éléments de structure le plus longtemps possible malgré l’action d’un incendie, contenir les effets thermiques le plus longtemps possible à la zone sinistrée. La principale spécificité de la protection passive est que dès le début d’un incendie, elle fonctionne sans aucune intervention humaine ni aucun apport extérieur d’énergie. C’est une protection durable, l’efficacité de la plupart des produits utilisés dans la protection passive n’étant pas limitée dans le temps. Les principaux moyens de la protection passive sont : Pour les structures, le flocage, l’encoffrement, les peintures ou enduits intumescents… Pour le compartimentage, les parois, les portes coupe-feu, les calfeutrements coupe-feu de pénétration de câbles et de tuyaux, les cheminements techniques protégés... Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Even though flexible and rigid intumescent-epoxy-PFP systems may yield considerably different flexibility data, the overall formulation technology and multiple intrinsic and extrinsic stress-strain factors determine whether or not epoxy PFPs crack in cold environments. It is important to choose a fireproofing system that fulfills the requirements for application to steel in shop and field environments during fabrication and construction phases - a fireproofing system that can be practically and economically maintained during the life of the asset. Fireosaurus Rex is by no means extinct ! Note de contenu : - Cold climates: intumescent epoxy-amine PFP - Cold climates: novel intumescent epoxy-polysulfide PFP - Shop application and productivity - Challenges and controversy with colde climates - Cold climate case history #1 - Epoxy-Amine PFP - Cold climate Case history #2 - Novel Epoxy-Polysulfide PFP - Warm climate Case history #3 - Novel Epoxy-Polysulfide PFP - Fig. 1 : Schematic cure process for two-component epoxy coatings - Fig. 2 : The epoxy-amine reaction - Fig. 3 : The polysulfide-thiol-amine reaction - Fig. 4 : Example of strain development as a function of temperature for epoxy-amine PFP - Fig. 5 : Example of strain development as a function of temperature for epoxy-amine PFP - Fig. 6 : Strain development compared to material strain capacity for epoxy-polysulfide PFP - Fig. 7 : Annual temperature profile kazakh steppe in 2017 - Fig. 8 : Clip-on mesh on flange tips - Fig. 9 : Epoxy-polysulfide PFP applied to structural steel - Table 1 : Comparison of epoxy-polysulfide (PFPs) - Table 2 : The basics of a novel-epoxy-polysulfide PFP Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31856 [article]

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Data-driven corrosion prevention and control decisions for the usaf / Eric Herzberg in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 8 (08/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 8 (08/2018) . - p. 32-41 Titre : Data-driven corrosion prevention and control decisions for the usaf Type de document : texte imprimé Auteurs : Eric Herzberg, Auteur ; Charles A. Babish, Auteur ; Jeffrey K. Nusser, Auteur ; Darryl J. Stimson, Auteur Année de publication : 2018 Article en page(s) : p. 32-41 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aéronautique Anticorrosion Corrosion Coût Entretien et réparations Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : AF weapon systems accumulate about 50-to-65 percent of their total life-cycle costs during the O&S phase. Corrosion accounts for about 25 percent of this cost and could rise in the future due to the increased emphasis on the complex coating systems required by an increased emphasis on stealth aircraft. The AF has expanded its focus on corrosion prevention and control and the annual corrosion maintenance costs have leveled out at around $5.4 billion per year. However, to make significant and lasting improvements, the AF needs reliable maintenance data and analytical tools to effectively manage corrosion maintenance. This article proposes a suite of metrics and a decision-making process to make data-driven corrosion maintenance decisions for aircraft and other systems to increase the mission availability in the most cost-effective way possible. The proposed process will enable stakeholders in the acquisition, sustainment, integrity programs and AF leadership communities to more accurately assess previous corrosion maintenance practices and prioritize future maintenance strategies. In sum, this approach will enable data-driven corrosion maintenance decisions. Corrosion maintenance is simply a significant subset, albeit a large contributor, to aircraft maintenance cost and availability impacts. Consequently, the metrics and proposed decision-making process suggested here can be migrated to many other aircraft maintenance decisions and should be considered for adaption to a broader range of maintenance decisions from strategic levels at the AF headquarters, through MAJCOMs, and to the field, depot and contract maintainers. Note de contenu : - Mission impact: this is war - Corrosion maintenance metrics: meet in the middle - Top-down: distillation approach to corrosion costs - Bottom-up: stacking labor and cost data from individual maintenance records - Scaling - Next-generation corrosion analytics: data-driven maintenance decisions - Proposed methodology - Monitor maintenance data - Identify problems and opportunities - Analyze options - Select and launch solutions - Fig. 1 : Breakout of mission-available time and non-available time - Fig. 2 : HC-130 corrosion at Patrick Air Force Base - Fig. 3 : FY15 aircraft non-available hours (NAH) from corrosion maintenance. Corrosion maitenance consumes nearly 3 million hours - 18 percent of all NAH that systems are unavailable to perform their missions - Fig. 4 : Corrosion costs the Air Force over $5 billion per year, nearly one quarter of all aerospace maintenance - Fig. 5 : The inverse relationship between preventive and corrective maintenance. This national chart illustrates the maintainer's challenge of balancing preventive and corrective maintenance to yield the minimum corrosionmaintenance cost - Fig. 6 : Top-down distillation to yield corrosion costs. To identify corrosioncosts, the total DoD budget is "distilled" by sequentially removing non-AF, non-aviation and non-maintenance costs until only corrosion-related maintenance costs remain. In reality, the crude oil distillation process removes the useful elements from the top. This example shows the most useful elements remaining at the bottom - Fig. 7 : Aircraft NAH due to corrosion maintenance and corrosion portion of total NAH. These metrics have varied over time - Fig. 8 : Corrosion maintenance cost and corrosion percent of total maintenance cost. Both have modestly decreased since 2012 - Fig. 9 : A model for the corrosion decision-making process - Fig. 10 : An example of ametric showing maintenanc eactions that consume the most mission availability - Fig. 11 : An example of a metric showing cost per day on maintenance actions that consume the most mission availability - Fig. 12 : An example of a notional metric showing aircraft substystems that consume the most mission availability - Fig. 13 : An example notional metric showing the cost perday of availability on aircraft subsystems that consume the most mission availability Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31857 [article]

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In-service cleaning & inspection of storage tanks / Ian Daniel in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 8 (08/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 8 (08/2018) . - p. 42-45 Titre : In-service cleaning & inspection of storage tanks Type de document : texte imprimé Auteurs : Ian Daniel, Auteur ; Mark Stone, Auteur Année de publication : 2018 Article en page(s) : p. 42-45 Langues : Américain (ame) Catégories : Contrôle technique Nettoyage Réservoirs (récipients) Index. décimale : 667.9 Revêtements et enduits Résumé : Difficult-to-reach locations and challenging conditions require innovative solutions that are guaranteed to work. By combining screening techniques with immediate inspection of areas of concern, inspection times can be intelligently reduced to focus on getting detailed information from the areas of the plant that need attention. Accurate data enables informed decisions on continued service or replacement. A major advantage of this novel testing procedure is that it was an iterative process whereby a tank-farm operator could screen all of the tanks and identify which where detected as the worst. On opening the tank and carrying out full base-plate inspection, it would be possible to check the model to see how accurate it was and by the time the third tank had completed its full inspection, the model would be fairly accurate and could be used in the future with more certainly. Note de contenu : - IN-SERVICE STORAGE TANK FLOOR INSPECTION - ASSESSMENT AND PLANNING : Operational - Integrity - Screening - Quantitative robotic inspection - Evaluation - Fitness For Service (FFS) and Remaining Life Assessment (RLA) - CLEANING OF STORAGE TANKS - Fig. 1 : Steps for in-service tank-floor inspection - Fig. 2 : Wall-thickness distribution across the tank shell Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31859 [article]

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Journal of protective coatings and linings Vol. 35, N° 8 URL