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Partager le résultat de cette rechercheCleanliness in submicrometer and atomic percent range in ADHESION - ADHESIVES + SEALANTS, Vol. 19, N° 2/2022 (2022)
Titre : Cleanliness in submicrometer and atomic percent range Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 10-12 Langues : Multilingue (mul) Catégories : Nettoyage industriel
Nettoyage industriel -- Appareils et matérielsTags : 'Nettoyage ultra-fin' 'Salle blanche' chimique' Plasma 'Rinçage par immersion/aspersion' Pulvérisation Revêtement Collage Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Particulate and filmic component cleanliness must be achieved reliably and efficiently in series production, especially when manufacturing, joining and coating technologies change. In parallel, requirements are growing due to ever stricter regulatory specifications. In addition to cleaning and drying processes designed to meet specific requirements and suitable technology, the software and the cleaning environment must also be adapted accordingly. Note de contenu : - Plant concepts for cleaning
- Cleaning processes and systems for ultra-high cleanliness
- Requirements for the process development
- Fig. 1 : The various treatment stations of this individually designed ultrasonic ultrafine cleaning system can be flexibly accessed
- Fig. 2 : By combining wet chemical and low-pressure plasma cleaning methods for ultrafine degreasing in a single machine, the surface characteristics required for downstream coating or bonding are efficiently achieved
- Fig. 3 : For integration into clean rooms the ultrasonic ultrafine cleaning systems are fitted out in compliance with the applicable clean room class
- Fig. 4 : In the immersion/spray rinse tanks specifically developed for ultrafine cleaning processes, the parts are sprayed off as they exit the bath which enhances the rinsing resultEn ligne : https://drive.google.com/file/d/1vEq8rAf_kDO2Uugjhv6nx5i0FtEUlDYb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37973
in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 2/2022 (2022) . - p. 10-12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23556 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Parts cleaning in pre-treatment processes Type de document : texte imprimé Auteurs : Sascha Glück, Auteur Année de publication : 2016 Article en page(s) : p. 52-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Pièces usinées -- Nettoyage Tags : Prétraitement 'Pièces usinées' Nettoyage Tensioactifs Analyse Désémulsifiants Emulsifiants 'Nettoyage aqueux' Bain Index. décimale : 667.1 Nettoyage Résumé : The replacement of traditional pre-treatment processes, such as zinc phosphating and chromating, with conversion coatings based on zirconium, titanium or trivalent chrome presents new-challenges for the entire process chain, inclucing the cleaning systems. Note de contenu : - The importance of the entire process chain
- Coordinating the cleaning process
- The right builder for the base material
- Machines and surfactants
- Analysis - more than just titration
- A replacement for mineral acid pickling
- A lower risk
- FIGURES : 1. Comparison of the typical thicknesses of conversion coatings - 2. Structure of the component surface before cleaning - 3. Comparison of demulsifying and emulsifying surfactants after the input of oil - 4. Synergies between builders and surfactants in aqueous cleaning systems - 5. Bath after a large input of emulsifying cutting fluid (right) and after treatment with the demulsifier SurTec 932Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27760
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 9, N° 3 (2016) . - p. 52-53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18490 - Périodique Bibliothèque principale Documentaires Disponible 18745 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Performance of paint systems after UHP (part 3) Type de document : texte imprimé Auteurs : Philippe Le Calvé, Auteur ; Jean-Pierre Pautasso, Auteur Année de publication : 2012 Article en page(s) : p. 38-47 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.
Anticorrosion
Atmosphère marine
Corrosion
Essais (technologie)
Métaux -- Nettoyage
Traîtements de surfaceTags : 'Surface métallique' Acier 'Nettoyage eau ultra-haute pression' 'Préparation surface avant peinture' Index. décimale : 667.9 Revêtements et enduits Résumé : Surface preparation processes influence the performance and lifetime of coating systems applied to steel substrates. The state of the steel surface immediately prior to painting is crucial and the main factors influencing the performance are the presence of rust and mill scale, surface contaminants including dust, salts and grease, surface profile. For aggressive environments such as marine atmospheres of C5M corrosivity category and high-performance coatings that require cleaner and/or rougher surfaces, blast cleaning is often the preferred method of surface preparation. However, it is well known that abrasive cleaning can produce a considerable amount of waste mainly containing blasting media, old removed paint and rust products. As an alternative to abrasive cleaning for maintenance work or complete renovation, ultra high pressure (UHP) waterjetting is becoming common as long as the performances of the coatings on steel structures are not affected. UHP waterjetting technology has been described intensively in previous papers. There are however questions about its suitability for new (naval) constructions.
Due to this, a project was started with the purpose of reinforcing the knowledge on the behaviour of different paint systems for highly corrosive marine environments (C5M) and more particularly assessing UHP waterjetting performance in relation to abrasive blasting on steel coated with a zinc-rich shop primer (ZRP).
In the first stage of the study, the characterisation of surfaces after UHP waterjetting of shop primet steel surfaces was reported in the april/june 2011 issue of PCE, and in the second part (reported in july/sep 2011 issue of PCE), the performance of 7 paint systems applied on UHP (DHP 4) treated ZRP coated steel flat panels and welded panels was studied in laboratory and field tests. The results were compared with conventional abrasive blasted (Sa 2.5 MG) surfaces. It was concluded that UHP waterjetting was a promising technique for steel surface preparation within the scope of new constructions (on ZRP coated steel).
The results showed a comparable behaviour of UHP waterjetting with standard surfaces after abrasive blasting. Despite a slight difference in the roughness compared to abrasive blasting, coating performance did not seem to be affected. However, some results remained inconclusive regarding welded panels as a consequence of inhomogeneous weld area.
In this article, the authors describe the third and final part of the study which involved testing three paint systems over UHP waterjetted ZRP panels, including more representative welded panels, compared to conventional grit blast treated panels.Note de contenu : - Experimental conditions
- Test panels, surface preparation and coating
- Artificial ageing test and field test
- Assessments : visual assessment - Pull-off adhesion test - Assessment requirements
- Results : Cyclic corrosion test C5M
- Natural ageingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13626
in PROTECTIVE COATINGS EUROPE (PCE) > Vol. 4, N° 1 (01-02-03/2012) . - p. 38-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13694 - Périodique Bibliothèque principale Documentaires Disponible
Titre : The application of mixed micelle theory to personal care ingredients Type de document : texte imprimé Auteurs : John Gormley, Auteur ; Chris Cook, Auteur Année de publication : 2003 Article en page(s) : p. 133-138 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Concentration micellaire critique
Micelles
Parabènes
Produits de toilette
SurfactantsTags : 'Synergie d'agent tensio-actif' 'Théorie régulière de solution' 'Compteur-irritation' 'Nettoyage doux' 'Efficacité des parabens' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Specific surfactant blends may contribute to reduce irritation by synergistically lowering the critical micelle concentration (CMC)and the monomer level of the more irritating surfactant in bulk solution. A computer program was made and used to calculate molecular interaction parameters (beta) using the widely accepted regular solution theory. This information allowed for the prediction of monomer levels at and above the CMC in mixed surfactant solutions having known CMC values. Such information is included for a series of amphoteric surfactants interacting with SLES-2 at pH 7 and ranked according to their efficiency in lowering the free anionic monomer content in the bulk phase. There is strong debate over whether a correlation truly exists between skin irritancy and CMC techniques. This technique and software provide part of the data set that can help support of refuse such a correlation.
This technique was also used to prescreen a developmental non-ionic surfactant for counter-irritancy with C14-16 alpha olefin sulfonates. The test surfactant was found to lack synergy with the anionic mixture, thus predicting that it would not be a milder system. This prescreening prevented testing this system on humans or animals.
The model was extended to calculate the interaction of Polysorbate-20 with propylparaben. The free active level(ex-micelle) of preservative was calculated as a function of total amount of preservative added. A strong interaction reduced the unbound propylparaben concentration such that anti-microbial activity was lost.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10604
in IFSCC MAGAZINE > Vol. 6, N° 2 (04-05-06/2003) . - p. 133-138[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003879 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres Cote Support Localisation Section Disponibilité 15088 - Périodique Bibliothèque principale Documentaires Disponible
