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JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) . Vol. 33, N° 9Coating municipal manholes : real-world testingMention de date : 09/2016 Paru le : 18/10/2016 |
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Ajouter le résultat dans votre panierHow to properly monitor temperature and humidity on an industrial coating project / Don Schnell in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 9 (09/2016)
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Titre : How to properly monitor temperature and humidity on an industrial coating project Type de document : texte imprimé Auteurs : Don Schnell, Auteur Année de publication : 2016 Article en page(s) : p. 12-17 Langues : Américain (ame) Catégories : Humidité -- Mesure
Hygrométrie
Mesure -- Instruments
Peinture industrielle
ThermométrieIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - What is the difference between dew point temperature and relative humidity and why is this important to measurements ?
- When measuring and monitoring conditions on the job, what is most important and why ?
- What are the most effective instruments and how should they be used ? : Measuring dew point : sling psychrometers - Measuring dew point : digital psychometrs - Measuring surface temperature
- FIGURES : 1. Reading the surface temperature with an infrared thermometer - 2. Measuring surface and ambient conditions using a digital psychrometer - 3. A remote monitoring system - 4. A handheld infrared thermometer, a digital psychrometer and a sling psychrometerEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5922 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28390
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Code-barres Cote Support Localisation Section Disponibilité 18361 - Périodique Bibliothèque principale Documentaires Disponible Contradictory information in a project specification / Chrissy Stewart in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 9 (09/2016)
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Titre : Contradictory information in a project specification : coating failure on the interior of a wastewater digester Type de document : texte imprimé Auteurs : Chrissy Stewart, Auteur Année de publication : 2016 Article en page(s) : p. 20-25 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Eaux usées -- Stations de traitements
Expertises
Revêtements -- Défauts:Peinture -- Défauts
Revêtements protecteurs -- DétériorationIndex. décimale : 667.9 Revêtements et enduits Résumé : The wastewater industry poses some of the most significant corrosion protection challenges for industrial protective coatings. In this case study, coating failure in the form of peeling and delamination (on concrete) and blistering (on steel) was observed on the interior of a digester at a wastewater treatment facility after only five years of service. Removal of sludge from the digester revealed disbonded pieces of coating, which alerted the facility owner to the failure. Due to the relatively short period of coating performance and the importance of a properly protected substrate, an investigation into the cause of the premature coating failure was undertaken.
The digester consisted of a concrete shell with a steel skirt plate situated at the top of the shell. A steel dome was attached to the skirt plate. The specification indicated that the operating temperature of the digester ranges from 95-to-131 F, and that a single coat was to be applied at a dry film thickness (DFT) of 125 mils on the concrete and 60 mils on the steel substrates. The specification listed several polyurethane coating materials that were deemed suitable for this environment. The coating selected for installation was one of the materials listed in the specification. The manufacturer’s product data sheet (PDS) listed a maximum service temperature of 120 F for immersion service and 180 F for dry conditions.
Because the contents in the digester were composed of sludge from a wastewater treatment plant, the environment would be considered immersion. The sludge included a mixture of organic and inorganic solids, grit, grease, scum and industrial solvents. Reportedly, small quantities of hydrogen sulfide, hydrogen and nitrogen gases were likely to be present as well. The design engineer for the digester reported that the contents were uniformly mixed to maintain consistent pH and temperature throughout the digester. Since the time that the selected coating material had been applied, the pH readings were reasonably close to 8 and the temperature ranged from 122-to-126 F.Note de contenu : - Site investigation
- Laboratory investigation
- Summary of the site investigation and forensic evidence
- FIGURES : 1. Cross section of sample removed below operating level - 2. Cross-section of sample removed above operating levelEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5923 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28391
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Code-barres Cote Support Localisation Section Disponibilité 18361 - Périodique Bibliothèque principale Documentaires Disponible Coating evaluation process for municipal manholes / Bob Murphy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 9 (09/2016)
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Titre : Coating evaluation process for municipal manholes Type de document : texte imprimé Auteurs : Bob Murphy, Auteur Année de publication : 2016 Article en page(s) : p. 26-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Entretien et réparations
Matériaux cimentaires -- Revêtements protecteurs
Métaux -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : From its origin, the word “manhole” had nothing to do with sewers. The original use came from the days of sailing ships to denote access points between a ship’s decks. Later the term was used to describe sewer access points due to the similarity of providing access for a human to move from one level to another — in this case from street level to the sewers underneath for maintenance. In the United States alone, an estimated 20 million of these access points dot roadways, sidewalks, fields and other areas. Evaluating and estimating the service life of these structures has become of critical importance to the overall operation of sewer collection systems. Note de contenu : - Evaluating manhole maintenance systems
- Performing manhole maintenance - day one and two
- Verifying results via field inspection
- Lining it all up
- FIGURES : 1. For manholes facing more aggressive service environments, it is advisable to apply a protective lining material as a topcoat to mitigate the effects of corrosion on the restored surfaces - 2. Corrosive gases and liquids inside manhole structures cause concrete to break down and steel to corrode, potentially creating leaks and subjecting sanitary collection systems to unwanted water infiltration that further taxes the systems - 3. Spraying and hand-troweling a stand-alone calcium aluminate mortar has proven to be a sufficient long-term repair for manholes not subjected to significant corrosive attacks - 4. Manhole structures tend to deteriorate over time due to exposure to a variety of corrosive materialsEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5914 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28392
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Code-barres Cote Support Localisation Section Disponibilité 18361 - Périodique Bibliothèque principale Documentaires Disponible The difference between waterjetting and wet abrasive blasting / Duane T. Hough in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 9 (09/2016)
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Titre : The difference between waterjetting and wet abrasive blasting Type de document : texte imprimé Auteurs : Duane T. Hough, Auteur Année de publication : 2016 Article en page(s) : p. 34-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Abrasion par jet d'eau
Surfaces -- Nettoyage
Traitement de surface par impactIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, the author discusses common misconceptions about what waterjetting and wet abrasive blasting equipment can really do, outlining the specific capabilities and key differences. Note de contenu : - MISCONCEPTIONS
- WATERJETTING : Pressure
- CLEANLINESS LEVELS
- WET ABRASIVE : Pressure - Cleanliness levels
- THE KEY DIFFERENCES
- FIGURES : 1. Wet abrasive vapor blasting being done on a liquid oxygen tank to meet SSPC-SP 10 (WAB) /NACE WAB-2, "near-white wet abrasive blast cleaning - 2. Low pressure Water Cleaning (LPWC) being done on a Florida Department of Transportation Project to meet SSPC-SP WJ-4/NACE WJ-4, "Light cleaning"En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5915 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28393
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Code-barres Cote Support Localisation Section Disponibilité 18361 - Périodique Bibliothèque principale Documentaires Disponible Shop coat versus field coat / Charles S. Brown in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 9 (09/2016)
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Titre : Shop coat versus field coat : The pros and cons Type de document : texte imprimé Auteurs : Charles S. Brown, Auteur Année de publication : 2016 Article en page(s) : p. 42-47 Langues : Américain (ame) Catégories : Coût-Efficacité
Epoxydes
Etudes comparatives
Polyuréthanes
Ponts métalliques -- Revêtements protecteurs
Primaire (revêtement)
Revêtements -- Finition:Peinture -- Finition
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Many bridge owners seem to believe that applying all three coats of paint in the shop is more cost-effective and will provide better coating performance on new steel.
This article will discuss the most widely used coating system coming out of the shop for bridge coatings, an inorganic zinc-rich primer, an epoxy intermediate coat and a polyurethane topcoat, and examine the cost differences through two case histories from the Maryland State Highway Administration where all three coats were applied in the shop.Note de contenu : - Cases
- Shop and field painting combinations : Shop/shop/field
- Shop cleaning and painting
- The cons
- Field cleaning and painting : The pros - The cons
- The cost of painting new steel in the field
- The cost of painting new steel in the shop
- FIGURES : 1. Once the bolts were tightened on the surfaces which had all three coats applied, failures occurred with the intermediate and topcoats fracturing down to the primer - 2. Fascia was only touched up and not repainted - 3. Shop cleaning and painting allows for a controlled atmosphere - 4. This figure shows a shipping and erection defect - 5. This gouge goes down to substrate and must be repaired to ensure that the coating has the longevity it was designed for - 6. Applying an additional coat of finish may be necessary to give these fascia defects a uniform appearance after erection is complete
- TABLE : Comparison of field vs. shop costsEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5916 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28394
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