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JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) . Vol. 33, N° 2The curse of the mummyMention de date : 02/2016 Paru le : 18/03/2016 |
Dépouillements
Ajouter le résultat dans votre panierCorrosion in less than one year is the pits ! / Valerie Sherbondy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
[article]
Titre : Corrosion in less than one year is the pits ! Type de document : texte imprimé Auteurs : Valerie Sherbondy, Auteur ; Richard A. Burgess, Auteur Année de publication : 2016 Article en page(s) : p. 15-21 Langues : Américain (ame) Catégories : Corrosion par piqure
pH
Pipelines -- Corrosion
Pipelines -- Revêtements protecteurs
Protection cathodique
Revêtements poudre:Peinture poudre
Surfaces -- Analyse
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Section Ioss of pipe wall is of great concern in the pipeline industry. Reduced wall thickness due to pitting corrosion can adversely impact pipeline integrity ; the results of which can be catastrophic depending on the product that the pipeline is transporting. In order to reduce the opportunity for corrosion, the use of protective coatings is often supplemented with irnpressed current cathodic protection (CP) systems to protect the pipe from corrosion, pitting and eventual perforation in the event of a breach in the protective coating system. In the instance discussed in this article, a pipe section that was excavated displayed severe pitting despite the application of a proven powder coating system and the installation of an impressed current CP system.
A section of pipeline needed to be excavated in a relatively small area to accommodate new construction in the surrounding area. The pipeline was buried and put into service only about six months earlier, so corrosion and coating failure were not expected. However, failure of the powder coating system and severe pitting was evident on the excavated pipe section. The pipeline owner was notified to witness the excavation and to examine the condition of the pipe.
After the initial section of pipe was excavated, additional lengths of pipe were exposed to determine the extent of the corrosion which was occurring in relatively deep pits that appeared randomly on the pipe sections in two areas. The other sections of excavated pipe revealed no visible corrosion. A section of the 24-inch pipe was removed and replaced. From this section a smaller 15-by-48-inch section was delivered to the laboratory along with a copy of the specification governing the application of the powder coating.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25628
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Code-barres Cote Support Localisation Section Disponibilité 17889 - Périodique Bibliothèque principale Documentaires Disponible Induction heating for cold weather preheating and post-curing of liquid epoxy coatings on gas pipeline girth welds / Bruce J. Wiskel in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
[article]
Titre : Induction heating for cold weather preheating and post-curing of liquid epoxy coatings on gas pipeline girth welds Type de document : texte imprimé Auteurs : Bruce J. Wiskel, Auteur ; J. Peter Ault, Auteur Année de publication : 2016 Langues : Américain (ame) Catégories : Basses températures
Chauffage par induction
Climat
Epoxydes
Lignes de soudure
Revêtements protecteurs
Tuyaux de gazIndex. décimale : 667.9 Revêtements et enduits Résumé : Induction heating for cold weather pipeline girth welds - In 2013, Pacific Gas & Electric Company (PG&E) did not have a specific standard or guidance for selection, application and inspection of cold weather, field-applied coatings on transmission piping when the pipe surface temperatures went below 50 F (10 C). In November of that year, unusually cold weather hit northern California. Night temperatures were below freezing, which caused the pipe surface to be below the 50 F minimum necessary to cure the approved epoxy coatings.
At this time, the application procedure consisted of enclosing the work area and using space heaters to raise the ambient temperature sufficient to increase the pipe temperature. This approach was costly and cumbersome, and resulted in cure times of 6-to-10 hours or more. With these long cure times, construction crews could not quickly backfill the pipelines, and corresponding construction production rates were slow and costs high.Note de contenu : - COLD WEATHER COATING CHALLENGES
- LOW-TEMPERATURE COATING
- INDUCTION HEATING : Laboratory demonstrations - Field demonstrations
- AN ALTERNATIVE PIPE-HEATING PRACTICEPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25629
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Code-barres Cote Support Localisation Section Disponibilité 17889 - Périodique Bibliothèque principale Documentaires Disponible Bad vibes / Peter Bock in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
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Titre : Bad vibes : Using coatings to eliminate vortex-induced vibration of riser strings on deep-water offshore structures Type de document : texte imprimé Auteurs : Peter Bock, Auteur Année de publication : 2016 Article en page(s) : p. 55-63 Langues : Américain (ame) Catégories : Amortissement (mécanique)
Fluoropolymères
Revêtements antisalissures
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Structures offshore -- Revêtements protecteurs
Vibrations (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings prevent offshore VIV damage - Shallow-water production platforms in the Gulf of Mexico actually stand on legs reaching to the seafloor, where they are secured by piles into the seabed. The riser piping is usually near the center of the structure and is held rigidly by its own strength and by the surrounding fixed leg structure. Deepwater structures can be actuel floating platforms and are held exactly in place by anchors or other methods. The riser pipe string may be the only solid direct connection between the seafloor and the floating production platform. Movement of the platform from wave action or tidal forces is compensated by flexible joint connections in the riser string. But when the rigid support of legs on the seafloor is removed and the length of the riser string increases for structures in deep water, a new insidious force comes into play —VIV, or vortex-induced vibrations, which can crack joints in the riser string or rupture the riser pipe itself, causing a potentially disastrous oil spill. Note de contenu : - What are VIV ?
- The glitch
- A solution through coatings
- Test applicationPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25630
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Code-barres Cote Support Localisation Section Disponibilité 17889 - Périodique Bibliothèque principale Documentaires Disponible Development of materials and process metrics for high-performance abrasive blast surface preparation / Robert Kloger in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
[article]
Titre : Development of materials and process metrics for high-performance abrasive blast surface preparation Type de document : texte imprimé Auteurs : Robert Kloger, Auteur ; Laura Erickson, Auteur Année de publication : 2016 Article en page(s) : p. 64-70 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Abrasifs
Anticorrosifs
Anticorrosion
Marines (peinture)
Traitement de surface par impact
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Surface preparation metrics for marine coatings - Protective coating systems provide the primary corrosion protection for assets in sea water. They are defined as a specific combination of surface preparation and coating material applied under specified conditions to a specific structure. Over many years, the paint industry has focused considerable resources toward the formulation, performance testing and fine tuning of coating materials. These efforts have produced outstanding results through implementation of advancements such as single-coat, ultra-high-solids paint for tanks, and by sharpening and implementing aggressive requirements in quality assurance and specification documents. Far less emphasis has been placed on understanding and refining the details of surface preparation and the effects of variations in these details on the subsequent performance of sea water immersion coatings. However, it is generally accepted that improper or inadequate surface preparation is a major contributor to real-world coating failures. Note de contenu : TABLE 1 : Grits tested
- FIGURES : 1. Panels arranged for blasting in glove box blasting cabinet - 2. Initial and post-blast size average distribution of garnet grits - 3. Mean grit size relationship to profile - 4. Mean grit size relationship to peak count per inch - 5. Profile depth method analysis
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Code-barres Cote Support Localisation Section Disponibilité 17889 - Périodique Bibliothèque principale Documentaires Disponible The curse of the mummy / Mike O'Donoghue in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
[article]
Titre : The curse of the mummy : Mysterious tank lining failures in wac vessels Type de document : texte imprimé Auteurs : Mike O'Donoghue, Auteur ; Vijay Datta, Auteur ; Sean Adlem, Auteur ; Jack Whittaker, Auteur ; Doug Wade, Auteur ; Margaret Pardy, Auteur Année de publication : 2016 Article en page(s) : p. 30-41 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Anticorrosion
Epoxydes
Réservoirs (récipients) -- revêtements protecteurs
Résistance chimique
Revêtements -- DéfautsIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy lining failures in WAC vessels - This article outlines discoveries made from forensic work to unravel epoxy lining failures in several water treatment weak acid cation (WAC) vessels. In previous work by authors Mike O'Donoghue and Vijay Datte, a forensic investigation of several costly tank lining failures was presented as analogous to an archeological dig wherein anticipation and wonder mounted as the investigation unearthed and unwrapped a "chemical mummy.
Would the present study prove to be similar ? Or would a different type of mummy be discovered in another, and altogether différent, series of tank lining failures. The answer was soon to be discovered in the Canadien ail patch where attention was focused on boiter feed water.
In the treatment of steam assisted gravity drainage (SAGD) boiler feed water, WAC and strong acid cation (SAC) ion-exchange vessels play an important role in the treatment of process fluids and demineralization of water to generate steam. The service conditions in WAC vessels are more aggressive than those in SAC vessels, with typical SAGD operating temperatures in excess of 93 C (200 F), operating pressures of 40-to-60 psi and a weekly regeneration protocol that consists of approximately 1.5 hours of acid treatment (6-percent hydrochloric acid, HCI) followed by 1.5 hours of caustic treatment (5-percent sodium hydroxide, NaOH). The ion-exchange resin bels in the WAC vessels are not considered overly aggressive when compared to the aggressive regeneration conditions. WAC resins have a carboxylic acid (COOH) functional group and are produced by copolymerizing acrylic acid with divinyl-benzene as a crosslinking agent2.3.
Due to the severity of the conditions in WAC and SAC vessels, high-performance linings must be carefully selected and carefully applied. The expectations are that the linings in WAC vessels should afford corrosion protection for at least 10 years.Note de contenu : - WAC AND SAC FLOW PROCESS
- RUBBER LINING FAILURES AND LABORATORY TEST PROGRAM
- SOLVENT-FREE EPOXY (SFE 1) : BEST IN TEST
- APPLICATION OF SFE 1 IN WAC VESSELS : Surface preparation - Application - Dry-film thikcness (DFT)
- THE MYSTERIOUS LINING FAILURE OF SFE 1
- FAILURE ANALYSIS : Observationin the WAC vessels
- DETERMINATION OF BASE-TO-CONVERVER MIX RATIO OF SFE 1 : ATR-FTIR of SPE 1 coating chip and control
- DISCUSSION : Epoxy chemistry of SFE 1 - Application considerations and field observations
- FIGURES : 1. A WAC vessel in service in the Canadian oil patch - 2. Prequalification testing of SFE 1 - 3. Surface blisters on SFE 1 in prequalification testing - SFE 1 in WAC vessels after two years of service
- TABLES : 1. Prequalification immersion testing at 90C of solvent free epoxy, SFE 1 in 10% HCL 10% nadh and process fluids - 2. Prequalification adhesion testing of solvent free-epoxy, SFE 1 - 3. WAC vessel A - Application of SFE 1 - 4. WAC vessel a lined with SFE 1 after 2 years service
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