Russian roulette : Coating performance with or without a sulfide removal treatment / Yasir Idlibi in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 11 (11/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 11 (11/2016) . - p. 38-50 Titre : Russian roulette : Coating performance with or without a sulfide removal treatment Type de document : texte imprimé Auteurs : Yasir Idlibi, Auteur ; Jason Hartt, Auteur ; Mike O'Donoghue, Auteur ; Vijay Datta, Auteur ; Bill Johnson, Auteur Année de publication : 2016 Article en page(s) : p. 38-50 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Chimie -- Essais et réactifs Epoxydes Métaux -- Revêtements protecteurs Polyamine cyclique Revêtements -- Analyse:Peinture -- Analyse Sulfures Surfaces -- Nettoyage Index. décimale : 667.9 Revêtements et enduits Résumé : Worldwide, many thin- and thick-film innovative polycyclamine-cured epoxy linings have performed admirably in oil patch, high-temperature service for tank, vessel and pipe spool internals. Notwithstanding, with ever-increasing temperatures and pressure and chemical resistance requirements in oil and gas environments, the demands placed upon linings are becoming more stringent. This article investigates whether the performance of these linings could be enhanced by first abrasive blasting the steel substrate and then providing a subsequent application (and removal) of a unique chemical reagent to remove deleterious sulfide contaminants, improve lining performance in aggressive immersion service conditions and potentially extend the life-cycles of the applied linings. Accelerated laboratory investigations were carried out on a set of reagent-treated, and untreated, carbon steel test panels. Sets of panels were lined with a three-coat, thin-film solvent-borne epoxy novolac coating or a single coat solvent-free, thick-film polycyclamine-cured epoxy. Characterization of the lining performance, the lining-steel interface and efficacy of the sulfide removal reagent was achieved using autoclave (NACE-TM0185), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM/EDX) and X-Ray diffraction (XRD). Note de contenu : - CANDIDATE SURFACE DECONTAMINATION TECHNOLOGY CHEMICAL CLEANING - CANDIDATE EPOXY LININGS - EXPERIMENTATION : Preparation and treatment of steel panels - Lining application - TEST METHODS FOR COATING EVALUATION : Autoclave - Electrochemical impedance spectroscopy (EIS) - Adhesion and visual rating - Surface profile measurements - Conductivity measurements - SEM-EDX - X-ray diffraction - RESULTS AND DISCUSSION : Surface profile measurement and visual observations - Conductivity measurement - SEM-EDX - FIGURES : 1. Preparation and treatment of 42 panels prior to coating application - 2. Examples of deliberately contaminated panels - 3. Examples of pre-test panels. (Left to right): Coating 2-Panel A, Coating 1-Panel B, Coating 2-Panel B and Coating 1-Panel C - 4. Coating 1 panels, post autoclave test. (Left to right): 2A, 1B, 2B and 1C - 5. Coating 2 panels, post autoclave test. (Left to right): 2A, 1B, 2B and 1C - 6. Impedance, pre- and post-autoclave exposure - 7. (Left) Panel A, Panel B (washed, brush blasted one side; contaminated on other side) and Panel C. (Center) Panel A, SSPC-SP 5/NACE No. 1 and (Right) Panel C, SSPC-SP 5/NACE No. 1 and chemically cleaned - 8. (Top row, Left) Test panels as received, (Center) unpacking of Test Panel B washed, uniform rusting throughout; Test Panel B unwashed similar and (Right) Test Panel B, boiling extraction method, all others similar. (Bottom row, Left): Test Panel A, surface profile measurements (ASTM D4417) prior to boil extraction, (Center) Test Panel C, surface profile measurements (ASTM D4417) prior to boil extraction and (Right) Liquid reagent sample cooling and test panels repackaged after boil extraction - 9. SEM image of Panel A (2,000 times as taken) showing surface and bulk energy-dispersive X-ray analysis (EDXA) elemental analysis showing iron, oxygen and other elements - 10. SEM image of Panel B clean surface (2,000 times as taken) showing surface and bulk EDXA elemental analysis showing iron oxide and other elements - 11. SEM image of Panel B dark surface (2,000 times as taken) showing surface and bulk EDXA elemental analysis showing iron sulfide and iron carbonate (as per XRD analysis) - 12. SEM image of Panel C (2,000 times as taken) showing etched surface from exposure to corrosive environment subsequently treated with cleaner. Surface is clean as shown by the predominantly iron peak shown in the EDX analysis - 13. (Left) At 8,000 times magnification, the surface of Panel A as blasted and (Right) Panel C after chemical treatment. Panel C shows etching effect from exposure to corrosive environment. By removing all the contaminants the chemical cleaner system has revealed the surface topography - TABLES : 1-2. Coating 1 and 2 autoclave analysis - 3. Conductivity and surface profile measurements of test panels pre-coating application - 4. Summary of XRD resuls (wt%) En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5946 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28385 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
18510	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Step-change epoxy coatings for pipes, tanks, vessels and railcars / Mike O'Donoghue in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 3 (03/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 3 (03/2018) . - p. 36-43 Titre : Step-change epoxy coatings for pipes, tanks, vessels and railcars Type de document : texte imprimé Auteurs : Mike O'Donoghue, Auteur ; Ian Fletcher, Auteur Année de publication : 2018 Article en page(s) : p. 36-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Acier inoxydable Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels. On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués. Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3. Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire. D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel. Epoxydes Industrie pétrolière et gazière Métaux -- Revêtements protecteurs Polyamine cyclique Résistance thermique Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In the worldwide oil and gas industry, the application of epoxy phenolic coatings has been a dominant strategy in order to obtain high heat resistance from coatings and mitigate corrosion under insulation (CUI) of both insulated carbon and stainless steel pipes operating up to 392 F (200 C). These coatings, however, are sensitive to over-application, prone to cracking and costly to repair when damaged. Additionally, if applied below 50 F (10 C), epoxy phenolic coatings do not cure properly and can fail prematurely, and when applied close to this temperature, can impact shop heating costs, maintenance schedules and productivity. The genesis and performance of a step-change epoxy coating for high heat-resistant service and CUI mitigation is investigated in this article. Based on a novel amine epoxy technology platform, this next generation high-temperature coating simplifies coating specifications and is easy to apply on carbon and stainless steel pipe externals for both insulated (CUI) and non-insulated service. Tolerant of over-application and possessing fast and sub-zero curing characteristics, the novel alkylated amine epoxy coating can enhance shop productivity and reduce project costs, thereby eliminating several challenges seen with traditional epoxy phenolic coatings. This article also describes another step-change epoxy: a novel lining developed for the internals of tanks, pipes, vessels and railcar internals. A high-film-build, rapid-curing, single-leg spray-applied modified polycyclamine-cured epoxy (MPCE), this lining was primarily developed for high-temperature and high-pressure immersion service in harsh oil field services and later for railcar internals. Aside from its high-temperature-resistant characteristics, the next-step MPCE was formulated to possess a smooth and abrasion-resistant surface with a low coefficient of friction and low surface energy, which markedly improved the flow properties of fluids and cargoes in tanks, pipes, vessels and railcars. Note de contenu : - Coatings for high heat and corrosion under insulation (CUI) - A snapshot of epoxy resins : structure, reactivity andheat resistance : Bisphenol A resins - Bisphenol F resins - Novolac resins - Linings for pipes, tanks, vessels and railcars - Step change : alkylated amine epoxy technology - Step change : modified polycyclamine-cured epoxy (MPCE) technology - FIGURES : 1. Epoxy phenolic and alkylated amine networks. Conventional epoxy phenolic and Rigid network. Restricts film DFT tolerance. Alkylated amine epoxy. Flexible network. Increases film DTF tolerance - 2. CUI resistance from CCCPT - 3. Pipe spools coated with alkylated amine epoxy technology - 4. Pipe spools coated with alkylated amine epoxy technology - 5. MPCE railcar lining - TABLES : 1. Conventional epoxy phenolic for high heat and CUI service - 2. Alkylated amine epoxy for high Heat and CUI service - 3. Tolerance to DFT over-application for a conventional epoxy phenolic - 4. Tolerance to DFT over-application for a novel alkylated amine epoxy - 5. Post-autoclave analysis from test program - 6. Critical surface tensions of a variety of substances En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6250 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30376 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
19768	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)