Accueil
Détail de l'auteur
Auteur Ahren Olson |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
DTM polyaspartic urethane coatings stand the test of time in rail industry / Ahren Olson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4633 (08/2017)
[article]
inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4633 (08/2017) . - p. 28-30
Titre : DTM polyaspartic urethane coatings stand the test of time in rail industry Type de document : texte imprimé Auteurs : Ahren Olson, Auteur ; Charles T. Williams, Auteur Année de publication : 2017 Article en page(s) : p. 28-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Automobiles -- Carrosseries
Automobiles -- Revêtements:Automobiles -- Peinture
Epoxydes
Polyaspartiques
Polyuréthanes
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Exterior railcar coatings will continue to require the correct balance of cost, long-term performance and productivity, while meeting current environmental regulations. DTM epoxy and acrylic coatings have provided this balance for railcar owners for many years.
However, owners more concerned with the long-term aesthetics of their railcars typically require a multi-coat epoxy/PUR systems for the added UV resistance provided by the PUR topcoat. These multicoat systems can now be replaced with a DTM PAS coating system to reduce cost and improve productivity without having to sacrifice the long-term performance.
This study documented the 15yr field performance of DTM PAS coatings versus an epoxy/PUR system. Both coatings systems have performed exceptionally well, exhibiting less than 0.1% rusting and are expected to last a total life cycle of 20-25yr before repainting. DTM PAS provides the required long-term performance af a two-coat system at a lower total applied cost. Compared to DTM epoxies and acrylics, DTM PAS is expected to provide 2-2.5x the coating life, which could remove two full painting cycles. Railcar owners will need to balance the removal of painting cycles versus the increased material cost of DTM PAS versus epoxies and acrylics.Note de contenu : - DTM pas railcar case study
- Field performance after 15 years' service
- FIGURES : 1. Hopper car being stencilled four hours after application of DTM PAS coating - 2. Excellent coverage on the pump - 3. Excellent coverage on hard to coat areas - 4. High gloss finish of dried DTM PAS coating moving into next bay - 5. Pictures of ar LUPX 60607. The DTM PAS coating is showing less than 0.1% rusting after 15yr of ewposure. Even on a rather poor weld (bottom left), the DTM PAS coating has penetrated well and is providing excellent corrosion protection - 6. Pictures of LUPX 60630. The epoxy/PUR two-coat system is performing excellently showing less than 0.1% rusting after 15 years in serviceEn ligne : https://drive.google.com/file/d/1v1B3MKuMO3uhLs-nYQiIvP77L98jHoJI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28850 [article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19185 - Périodique Bibliothèque principale Documentaires Disponible High-build MCU coating innovation / Ahren Olson in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 3 (03/2011)
[article]
inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 18, N° 3 (03/2011) . - p. 19-22
Titre : High-build MCU coating innovation : An MCU resin has been developed that presents new opportunities for protecting structural steel in corrosive environments Type de document : texte imprimé Auteurs : Ahren Olson, Auteur Année de publication : 2011 Article en page(s) : p. 19-22 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Métaux -- Revêtements protecteurs
Polyisocyanates
Polyurée
Polyuréthanes
Réticulation à l'humidité
Revêtements -- Finition:Peinture -- FinitionIndex. décimale : 667.9 Revêtements et enduits Résumé : A moisture-cured polyurethane system using raw materials from Bayer MaterialScience was used to coat more than 35,000 square feet of piping and valves inside the Hammond Water Filtration Plant.
A moisture-cure urethane (MCU) coating is a one-component paint that consists of a polyisocyanate functional resin along with solvents, pigments, catalyst, and additives. The coating cures as the isocyanate resin reacts with ambient moisture after being applied to the substrate. Figure 1 describes the curing mechanism in more detail.
When the coating is applied to the substrate, solvent begins to flash off and the coating absorbs some of the ambient moisture. The isocyanate (R-NCO) reacts with that moisture to form an amine (R-NH2) and release carbon dioxide gas. The isocyanate then reacts with the amine to form a polyurea crosslinked network.
The use of an aliphatic MCU topcoat offers several advantages. For example, these types of coatings can cure at low temperatures, as long as ambient moisture is present. Also, MCUs are very surface tolerant and, because they are a one-component paint system, mixing errors between multiple components in the field are avoided.Note de contenu : - Manufacturing processes
- Current MCU market status
- New high-build MCU resin
- First field trial
- Second field trial
En ligne : http://www.adhesivesmag.com/articles/89735-high-build-mcu-coating-innovation Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25811 [article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 012912 - Périodique Bibliothèque principale Documentaires Disponible Moving beyond the 25-year coating / Todd Williams in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 12 (12/2017)
[article]
inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 12 (12/2017) . - p. 42-53
Titre : Moving beyond the 25-year coating Type de document : texte imprimé Auteurs : Todd Williams, Auteur ; Ahren Olson, Auteur ; Paul Vinik, Auteur Année de publication : 2018 Article en page(s) : p. 42-53 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Composés inorganiques
Composés organiques
Corrosion
Essais accélérés (technologie)
Essais de résilience
Primaire (revêtement)
Revêtements -- Finition:Peinture -- Finition
Revêtements multicouches
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Zinc-rich primers have been well studied, yet specifying inorganic (IOZ) or organic zinc (OZ) for three-coat systems remains a highly debated topic. During the 1960s and 1970s inorganic zincs became the dominant primer in North America and published literature shows IOZ outperforming OZ in three-coat systems. The study presented in this article focuses on evaluating two variables within the traditional ZEU system that could impact performance — zinc-rich primer type (i.e., inorganic or organic) and topcoat chemistry. Note de contenu : - Adhesion
- Accelerated corrosion testing
- Natural corrosion testing
- Accelerating weathering
- Natural weathering
- TABLES : 1. Description of coatings applied and evaluated in study - 2. Average dry-film thickness of each coat of three-coat systems - 3. NEPCOAT Coating Performance Requirements
- FIGURES : 1. Panels attached to a rack at the natural weathering site in the Florida Keys. The rack is facing south and panels are exposed at a 45 degree angle from vertical - 2. Tensile adhesion results ; asterisk denotes glue-to-topcoat failure - 3. Scribe creep data after 5,000 hours of B117 exposure - 4. Data from 5,040 hours of D5894 testing - 5. Blistering of Coatings After 4,032 Hours Cyclic Prohesion (ASTM D5894) - 6. Panels after 54 months of exposure at Tea Table Key - 7. QUV-A data after 5,000 hours of exposure per ASTM 4587 cycle 2 - 8. Color retention data after 5,000 hours of exposure per ASTM D4587 cycle 2 - 9. Gloss retention in natural weathering after 54 months of exposure at Tea Table Key - 10. Color retention in natural weathering after 54 months of exposure at Tea Table KeyEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6209 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30362 [article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19542 - Périodique Bibliothèque principale Documentaires Disponible Polyaspartic coatings protect virginia steel brifges for more than a decade / Ahren Olson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4624 (09/2016)
[article]
inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4624 (09/2016) . - p. 21-26
Titre : Polyaspartic coatings protect virginia steel brifges for more than a decade Type de document : texte imprimé Auteurs : Ahren Olson, Auteur ; Todd Williams, Auteur ; Mark Hudson, Auteur ; C. Wayne Fleming, Auteur Année de publication : 2016 Article en page(s) : p. 21-26 Note générale : Bibliogr. Langues : Anglais (eng) 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.
Anticorrosifs
Anticorrosion
Métaux -- Revêtements protecteurs
Polyuréthanes
Ponts métalliques -- Revêtements protecteurs
Primaire (revêtement)
Revêtements multicouches
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : A study on the use of a high-build, two-coat polyaspartic urethane coating system, showed increases in productivity, with a zinc-rich primer for the protection of steel bridges.
This research concerns the field performance of PAS two-coat coating systems and further validated the technology's excellent corrosion prevention noted in many previous investigations. With performance being equal, PAS two-coat systems can provide significant value to bridge owners in the form of overall cost reduction in painting operations, accelerated painting schedules and milder traffic congestion headaches. An extra performance benefit : PAS two-coat systems also exhibit excellent edge protection areas in which corrosion is most likely to start.
However, this study also demonstrated that all coatings applied to steel bridges with timber bridge decks provided reduced corrosion protection than the same coatings applied to steel bridges with concrete decks. The reduced coating performance in timber deck bridges was caused by the flexing and spacing of deck timbers, which allowed road salts and water to penetrate to the steel girder, accelerating corrosion.Note de contenu : - BRIDGE DESCRIPTIONS AND INSPECTION PROCEDURE
- BRIDGES WITH CONCRETE DECKS : MCU three-coat system with concrete deck - PAS two-coat system with concrete deck
- BRIDGES WITH TIMBER DECKS : MCU three-coat system with timber deck and asphalt overlay - PAS two-coat system with timber deck and asphalt overlay
- TRUSS BRIDGES : Truss bridges with timber decks and asphalt overlayEn ligne : https://drive.google.com/file/d/16bRlc5av3xOh2urm_WMdTrxGmBdZYijN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27740 [article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18317 - Périodique Bibliothèque principale Documentaires Disponible Two-coat polyaspartic urethane coatings protect Virginia steel bridges for over a decade / Ahren Olson in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 1 (01/2016)
[article]
inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 1 (01/2016) . - p. 56-63
Titre : Two-coat polyaspartic urethane coatings protect Virginia steel bridges for over a decade Type de document : texte imprimé Auteurs : Ahren Olson, Auteur ; Todd Williams, Auteur ; C. Wayne Fleming, Auteur Année de publication : 2016 Article en page(s) : p. 56-63 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polyaspartiques
Polyuréthanes
Ponts -- entretien et réparations
Ponts métalliques -- Revêtements protecteurs
Revêtements multicouches
Revêtements:PeintureNote de contenu : - TABLES : 1. Bridges repainted on project BP-8C with a PAS two-coat system - 2. Bridges repainted on project BP-8A-04 with a MCU three-coat system - 3. Bridges repainted on project BP06-968-101 with a MCU three-coat system - 4. Inspection rating system for field evaluations - 5. Rating summary for MCU three-coat and PAS two-coat systems Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25423 [article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17829 - Périodique Bibliothèque principale Documentaires Disponible