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Considerations for reconstruction of a bridge exhibiting staining / Cynthia O'Malley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 4 (04/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 4 (04/2018) . - p. 13-17 Titre : Considerations for reconstruction of a bridge exhibiting staining Type de document : texte imprimé Auteurs : Cynthia O'Malley, Auteur Année de publication : 2018 Article en page(s) : p. 13-17 Langues : Américain (ame) 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 Copolymère silicone acrylique Epoxydes Expertises Métaux -- Revêtements protecteurs Ponts -- entretien et réparations Ponts métalliques -- Revêtements protecteurs Revêtements -- Défauts:Peinture -- Défauts Revêtements multicouches Index. décimale : 667.9 Revêtements et enduits Résumé : When a large-scale bridge is in need of significant reconstruction, many factors should be considered prior to initiation of the project. Part of this particular reconstruction involved repainting of the structural steel on a 40-foot-wide lift bridge that had a total length (including approaches) of 2,877 feet, with a main span of 418 feet. The coating system selected consisted of four coats: a zinc primer coat, a tie-coat, one coat of epoxy and an acrylic polysiloxane topcoat with high gloss. The coating system was applied during the winter, spring and summer of 2008. Sometime after the topcoat was applied to the bridge, staining was noticed in numerous areas. These stains appeared as spots and streaks and were observed on various locations of the bridge, but the most concentrated areas were on the north side. The owner, through a recommendation of the prime engineer, contracted an independent, third-party consultant to investigate the staining problem and determine the cause in order to prepare for further rehabilitation. Note de contenu : - Field investigation- - Laboratory analysis and discussion - Fig. 1 : Close-up of stain around particle embedded in the topcoat - Fig. 2 : Streaks of staining on one of the bridge lift towers - Fig. 3 : Staining on north box chord - Fig. 4 : Severe staining on north fascia - Fig. 5 : Close-up of stain streak in sample area - Fig. 6 : Close-up of stain underneath rivet En ligne : https://www.paintsquare.com/archive/?fuseaction=view&articleid=6288 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30684 [article]

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Root cause analysis and corrective action : turning problems into solutions / Alison B. Kaelin in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 4 (04/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 4 (04/2018) . - p. 19-23 Titre : Root cause analysis and corrective action : turning problems into solutions Type de document : texte imprimé Auteurs : Alison B. Kaelin, Auteur Année de publication : 2018 Article en page(s) : p. 19-23 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité) Vérification interne Index. décimale : 657.45 Audit Résumé : The coatings industry at all levels is becoming increasingly subject tu auditing by a variety of entities. The American Society for Quality (ASQ) defines an audit as a “systematic, independent and documented process for obtaining audit evidence (records, statements of fact or other information which are relevant and verifiable) and evaluating it objectively to determine the extent to which the audit criteria (set of policies, procedures or requirements) are fulfilled." Audits are performed by certification organizations such as SSPC Qualification Procedures(QP),the NACE International Institute Contractor Accreditation Program (NIICAP), ASIC Sophisticated Endorsement for Fabrication or Painting (AISC SPE 420) or against various International Standards Organization (ISO) programs for laboratory analysis, calibration and quality. Work related to nuclear work generally involves auditing against 40 CFR 50, Appendix B or ASME NQA-I standard, "Quality Assurance Requirements for Nuclear Facility Applications." Many large manufacturing or construction projects also perform supplier audits on current and potential vendors or contractors. Audits should also be internal and ongoing. These internal audits are generally performed on processes, employees, procedures and other functions used to control quality. SSPC's QP programs require an annual internal audit. So, you got audited, or performed an internal audit of your own company. Obviously, there were some findings. Now what ? Requests for correcting nonconformities or findings commonly result from any type of audit. Corrective action is action taken to eliminate the causes of the nonconformity, defect or other situation in order to prevent recurrence. Corrective action is reactive and is about eliminating the cause of a current problem. Preventive action is action taken to eliminate the causes of future issues— a proactive approach. Most corrective actions fait because they treat the symptoms or perceived symptoms, but never address the cause. Addressing the symptoms instead of the cause leads to a temporaty or partial fix. For example, if you have high dry-film thickness (DFT) readings and only correct if by reducing the applied DFT to resolve that single problem, you may not learn why the DFT readings were high in the first place. Maybe the Bauges weren't calibrated properly, leading to inaccurate readings, or perhaps the applicators did not receive adequate training in the equipment and methods they were using. This is where root cause analysis comes in handy. Note de contenu : - ROOT CAUSE ANALYSIS : Five "Why"s - Fishbone diagram - IMPLEMENTING CORRECTIVE ACTIONS - Fig. 1 : A sample root cause analysis (RCA diagram - Fig. 2 : A fishbone diagram displays the possible causes of a problem - Fig. 3 : This completed fishbone diagram show some of the root causes for high DFT readings En ligne : https://www.paintsquare.com/archive/?fuseaction=view&articleid=6289 Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30685 [article]

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Evaluating material loss of steel under protective coatings in marine environments / Patrick Cassidy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 4 (04/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 4 (04/2018) . - p. 24-34 Titre : Evaluating material loss of steel under protective coatings in marine environments Type de document : texte imprimé Auteurs : Patrick Cassidy, Auteur ; James A. Ellor, Auteur ; John Wegand, Auteur ; James Martin, Auteur ; Paul Slebodnick, Auteur ; James Tagert, Auteur Année de publication : 2018 Article en page(s) : p. 24-34 Note générale : Bibliogr. Langues : Américain (ame) 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 Bateaux -- Entretien et réparations Corrosion par piqure Epoxydes Mesure Métaux -- Revêtements protecteurs Perte de masse (matériaux) Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : Over the past 20 years, the U.S. Navy has implemented the use of advanced ultra-high-solids (UHS) coatings for the protection of ship tanks and voids to extend the life of tank coatings. In areas of breakdown, the maintenance community needs a suitable touch-up and repair coating and as part of this ongoing effort, the Navy sought methods to improve basic coating test methods to better assess repair coating performance. This article describes this testing, the goal of which is to project greater than 10 years of service life. Note de contenu : - Fig. 1 : Initial coating deterioration at weld beads and edges - Fig. 2 : System 1 at three, 6, 12 and 40 months of exposure - Fig. 3 : Summary of blistering and rust-through data via visual inspection : System 1, 2 and 3 - Fig. 4 : Summary of cutback measurements via destructive inspection. System, 1, 2 and 3 - Fig. 5 : System 3 polyamide epoxy 15-mil-thick coating at the end of exposure and after coating removal at 40 months alternate seawater immersion - Fig. 6 : System 1 edge-retentive epoxy 15-mil-thick coating removal after 40 months of alternate seawater immersion - Fig. 7 : Pitting corrosion depth adjacent to the scribe over time at 12 and 40 months of exposure - Fig. 8 : Pitting corrosion depth adjacent to the scribe by coating type at 40 months of exposure, system 1, 2 and 3 - Fig. 9 : Pitting corrosion depth adjacent to the scribe as a function of blister density, 40 months of exposure - Fig. 10 : Pitting corrosion depth on the panel face over time, at 12 and 40 months of exposure - Fig. 11 : Pitting corrosion depth on the panel face by coating type at 40 months of exposure, system 1, 2 and 3 - Fig. 12 : Pitting corrosion depth on the panel face as a function of blister density at 40 months of exposure - Fig. 13 : Maximum pit depth adjacent to the scribe vs. measured coating cutback at the scribe - Fig. 14 : Pit depth on panel face vs. pit depth adjacent to the scribe - Table 1 : Coating test matrix for test panels - Table 2 : Summary of depth of attack data (in inches) En ligne : https://www.paintsquare.com/archive/index.cfm?fuseaction=view&articleid=6290 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30712 [article]

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Fundamentals of fusion-bonded epoxy application / David A. Hunter in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 4 (04/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 4 (04/2018) . - p. 36-39 Titre : Fundamentals of fusion-bonded epoxy application Type de document : texte imprimé Auteurs : David A. Hunter, Auteur ; Sean M. Browning, Auteur Année de publication : 2018 Article en page(s) : p. 36-39 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Métaux -- Revêtements protecteurs Pipelines -- Revêtements protecteurs Revêtement époxy lié par fusion Tuyauterie -- Protection Index. décimale : 667.9 Revêtements et enduits Résumé : Protective coatings for carbon steel are well known as an economical method of controlling corrosion versus the use of alternative materials such as stainless steel. At first glance, buried piping seems to have a stable environment. One might assume that coatings would not necessarily be required, as they might be for atmospheric environments, which are bombarded with rain, snow (depending on location), fog, ultraviolet light and significant temperature differentials. Buried environments, however, even in semi-arid climates, contain enough moisture in the soil to conduct ionic current, which completes the circuit for corrosion of most metals. One way to control buried corrosion is to employ cathodic protection (CP), and indeed, buried pipe corrosion can be controlled with CP alone. The limitation of using solely CP, however, is the amount of CP required to protect the exposed surface area. The greater the current requirements, the larger and more expansive the CP required, meaning greater installation, maintenance and monitoring costs which drives up the cost of operating a pipeline. And for pipelines carrying hazardous materials, the requirements for maintaining the lines are prescribed by federal law. Therefore, a cost-effective design approach is to use coatings in conjunction with cathodic protection to protect the line. Note de contenu : - Coating system selection - The 1-2-3 of FBE - Fig. 1 : FBE powder application - Fig. 2 : Outline of the fBE process - Fig. 3 : View of pipes in the laydown yard - Fig. 4 : View of air-heating units to warm pipes - Fig. 5 : Pipe entering shot-blasting machine - Fig. 6 : Wheel-blasting machines lined up in series - Fig. 7 : Pipes after surface preparation with pipe connectors attached - Fig. 8 : Pipes entering the fumace - Fig. 9 : Quenching area - Fig. 10 : Holiday testing - Fig. 11 : Taking dry-film-thickness measurements - Fig. 12 : Loading pipes -Table 1 : Characteristics and limitations of fusion- bonded epoxy En ligne : https://www.paintsquare.com/archive/?fuseaction=view&articleid=6291 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30713 [article]

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Journal of protective coatings and linings Vol. 35, N° 4 URL