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Ensure accurate "dry film thickness" readings : 10 important things to know in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 12-16 Titre : Ensure accurate "dry film thickness" readings : 10 important things to know Type de document : texte imprimé Année de publication : 2016 Article en page(s) : p. 12-16 Langues : Américain (ame) Catégories : Contrôle technique Couches minces Epaisseur -- Mesure Etalonnage Normalisation Index. décimale : 667.9 Revêtements et enduits Résumé : Hand held dry film thickness (DFT) gages are common inspection tools used by applicators and inspectors. With a little care and maintenance, mechanical and electronic instruments can be relied upon to give many years of accurate and dependable service. Good operation begins with reading the manual. All instruments have subtle operational differences. Record the make, model, serial number and date of purchase inside the manual and highlight maintenance and calibration tips. Note de contenu : - Can I calibrate ? - It's vital to verify - Influential effects - Edge cases - Roughly adjusting for profile - Accumulations errors - Inspect your probe - Holding the probe - One is seldom enough - FIGURES : 1. A certificate of calibration - 2. A sample calculation - 3. Surface profile usually results in higher readings - 4. The accuracy of an adjusted gage changes from +1% to +5% as calculated using a root sum of the squares formula - 5. For best results and longest life, the sliding probe should not be gripped high, but instead with your fingers low to the surface En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5874 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28415 [article]

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Protecting offshore platforms in the Gulf of Mexico : shortcuts = potential havoc / Peter Bock in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 18-20 Titre : Protecting offshore platforms in the Gulf of Mexico : shortcuts = potential havoc Type de document : texte imprimé Auteurs : Peter Bock, Auteur Année de publication : 2016 Article en page(s) : p. 18-20 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité) Métaux -- Revêtements protecteurs Qualité -- Contrôle Revêtements -- Détérioration:Peinture -- Détérioration Revêtements protecteurs -- Détérioration Structures offshore -- Entretien et réparations Structures offshore -- Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Maintenance painting on offshore oil production structures in the Gulf of Mexico presents extremely severe environmental challenges, both for the contractor’s surface preparation and coating application, and for the service life of the applied coating system. Very high costs, limited space, poor working conditions and the constant threat of delays from bad weather all conspire against getting a project done exactly according to specification, SSPC-PA 2 and best painting practice. But because of the severity of the environment, minor shortcuts that might not even be noticed long-term in an onshore mild environment project can wreak havoc on an offshore structure. Note de contenu : - Fig. 1. Bare, rusty steel in failed areas showed different levels of inorganic zinc residue - Fig. 2. This nonferrous machinery cover showed the same type of coating failure due to poor surface preparation and excessive coating system thickness - Fig. 3. Many areas had lost the coating system to bare steel; in others, the coating was still in place but disbonded, with rust beneath En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5875 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28416 [article]

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Practical in-plant evaluation of two FBE abrasion-resistant overcoat systems / Emre Aksu in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 22-29 Titre : Practical in-plant evaluation of two FBE abrasion-resistant overcoat systems Type de document : texte imprimé Auteurs : Emre Aksu, Auteur ; Alan Kehr, Auteur ; Matt Dabiri, Auteur Année de publication : 2016 Article en page(s) : p. 22-29 Langues : Américain (ame) Catégories : Adhésion Anticorrosion Eau chaude Epoxydes Essais de résilience Essais dynamiques Porosité Qualité -- Contrôle Résistance à l'abrasion Résistance à la fusion Revêtement époxy lié par fusion Revêtements -- Propriétés mécaniques Revêtements multicouches Revêtements protecteurs Souplesse (mécanique) Test d'immersion Tuyauterie Tuyauterie -- Protection Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, the authors illustrate a comparison between a new flexible version of an abrasion-resistant overcoat (ARO) coating system and two ARO coatings at a total thickness of 20 mils, two single-layer fusion-bonded epoxy (FBE) coatings, and two dual-layer FBE (2LFBE) systems at a thickness of 60 mils. Note de contenu : - Coating process - Thickness of evaluated systems - The cathodic disbondment test (CDT) : Short-term cathodic disbondment testing - Long-term cathodic disbondment testing - Flexibility - Hot-water soak adhesion (HWS) - Porosity - FIGURES : 1. For this set of tests, a profilometer measured a peak to valley height of 70-to-100 µm (~3 – 4 mil) and an average peak count of 41/cm (104/in) - 2. Both the short- and long-term CD tests were conducted at 65 C (150 F), -3.5 V (calomel reference electrode) and a 3-percent NaCl electrolyte - 3. Short-term cathodic disbondment results - 4. Long-term cathodic disbondment results - 5. A crack on a bended sample under 40 times magnification. Any coating crack seen at 40 times magnification constituted a failure - 6. While the flexible ARO layer showed a low level of porosity, almost none was seen in the remaining samples for either layer - 7. Average passing impact resistance results - TABLES : 1. Different coating thickness systems for the tests - 2. Average flexibility results for different mandrels - 3. Average hot water soak adhesion results - 4. Average porosity ratings of coating layers - 5. Test averages according to coating type En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5867 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28418 [article]

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New advances in epoxy coatings for marine markets / James McCarthy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 32-43 Titre : New advances in epoxy coatings for marine markets Type de document : texte imprimé Auteurs : James McCarthy, Auteur Année de publication : 2016 Article en page(s) : p. 32-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Anticorrosion Epoxydes Essai de dureté Essais de brouillard salin Essais dynamiques Marines (peinture) Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Because of its high-performance capabilities, epoxy technology has been a mainstay of the marine coatings market for many years, but this technology also presents problems resulting from its two-component composition. The author describes testing of single-component coatings for marine applications that offer advantages over multi-component coatings such as eliminating pot-life and mix-ratio concerns while satisfying performance requirements. Note de contenu : - THE TECHNOLOGY - TESTING AND RESULTS : Materials - Methods - ASTM B117 SALT FOG TEST - ASTM D5894 CYCLIC PROHESION TEST - ASTM D2247 TESTING WATER RESISTANCE OF COATINGS 100=PERCENT RELATIVE HUMIDITY - PHYSICAL PROPERTIES : Abrasion resistance - Film hardness development - Impact resistance - Adhesion - Stability - Other properties - FIGURES : 1. 1,000 hour salt fog panels before stripping and after stripping - 2. 2,000 hour salt fog panels before stripping and after stripping - 3. 3,000 hour salt fog panels before stripping and after stripping - 4. 1,500 hour cyclic prohesion before stripping and after stripping - 5. 3,000 hour cyclic prohesion before stripping and after stripping - 6. Pendulum hardness test results - TABLES : 1. Rating guide - 2. Salt fog results - 3. Prohesion test results - 4. Condensing humidity test results - 5. Abrasion resistance test results - 6. Impact test results - 7. Adhesion test results - 8. Viscosity increase with aging at 120 F - 9. A comparison of typical properties En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5868 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28419 [article]

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The effect of surface preparation on coating performance / Patrick Cassidy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 50-60 Titre : The effect of surface preparation on coating performance Type de document : texte imprimé Auteurs : Patrick Cassidy, Auteur ; Paul Slebodnick, Auteur ; James Tagert, Auteur ; James Martin, Auteur Année de publication : 2016 Article en page(s) : p. 50-60 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité) Chlorures Contamination chimique Qualité -- Contrôle Revêtements -- Détérioration:Peinture -- Détérioration Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : This article describes a study of the effect of profile type, profile height, the extent of cleanliness and the amount of chloride contamination on coating performance in an effort to determine the correlation between these factors and to ideally identify whether or not there is a primary surface preparation factor that leads to coating failure. Note de contenu : - TEST APPROACH : The effect of profile type - The effect of profile height - The effect of contamination - RESULTS : The effects of profile type - The effect of profile height - The effect of contamination - FIGURES : 1. This images shows the final surface profile types - 2. The final panel for exposure with scribes. Note the touched-up areas - 3. This image shows the excessive profile height panel - 4. The final excessive profile height panel ready for exposure - 5. Hand tool prepared panel ready for exposure in Ft. Lauderdale, Fla - 6. Pre-exposure adhesion test results - 7. Post-exposure adhesion results after 1,000 hours as per ASTM B 117 - 8. Post-exposure adhesion results after one year in Key West, Fla - 9. Cutback data by coating system after 1,000 hours as per ASTM B117 - 10. Cutback data by surface preparation, all coating systems after 1,000 hours as per ASTM B117 - 11. Cutback data by coating system after one year of natural exposure - 12. Cutback data by surface preparation method, all coating systems after one year of natural atmospheric exposure - 13. Three sample panels after removal from one year of natural atmospheric exposure. Surface preparation methods were (left to right) power wire brush, needle gun and abrasive blast. Some coating systems performed better than others over an SSPC-SP 11 surface. Note the massive delamination of the coating over the left two-thirds of the center panel. No trend was recognized as to why this occurred - 14. Excessive profile panels after 1,000 hours as per ASTM B117. Film thickness increases (left to right) at 10 mils WFT, then 11 mils, then 12 mils and on the far right, 14 mils WFT - 15. Average rust-through rating by primer thickness - 16. Average blister rating by primer thickness - 17. Final results of coating performance for all exposures (100 cycles GMW14872/six months natural atmospheric exposure, Ft. Lauderdale, Fla.) - TABLE : Surface profile type En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5870 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28421 [article]

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Journal of Protective Coatings and Linings - Vol. 33, N° 7 URL