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Testing adhesion of multi-coat systems / Karen Fischer in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 10 (10/2013)
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inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 10 (10/2013) . - p. 10-12
Titre : Testing adhesion of multi-coat systems : When should the adhesion of an applied coating or lining multi-coat system be tested ? Type de document : texte imprimé Auteurs : Karen Fischer, Auteur ; Daniel Liu, Auteur ; Tom Swan, Auteur ; Manpreet Singh, Auteur ; Atanas Cholakov, Auteur ; Trevor Neale, Auteur ; Bryant Chandler, Auteur Année de publication : 2013 Article en page(s) : p. 10-12 Langues : Américain (ame) Catégories : Couches minces multicouches
Essais d'adhésion
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : Adhesion testing should be performed for one of two basic reasons :
- If the specification calls for it as a qualifying test for acceptance of the coating system, or
- If there is failure or suspected failure in the coating system (material and/or methods) that cannot be evaluated (or fully evaluated) by non-destructive methods.
One must always keep in mind that an adhesion test is a destructive test, so the resulting test area now becomes a repair that could, in itself, fail. This is especially important to keep in mind in the case of linings or any system that will be in immersion service, mechanical service, or a chemical/harsh environmental service.
Because it may be necessary to perform adhesion testing in multiple areas (depending on the size of the suspected areas), there will be multiple repairs. Destructive testing should always be the last method employed, not the first method, when evaluating a coating for suspected or obvious failure.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20908 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15733 - Périodique Bibliothèque principale Documentaires Disponible Titanium dioxide pigment post-treatment : influence on electrostatic stability of technical dispersions / Daniel Liu in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 27, N° 7 (07/2020)
[article]
inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 27, N° 7 (07/2020) . - p. 35-37
Titre : Titanium dioxide pigment post-treatment : influence on electrostatic stability of technical dispersions Type de document : texte imprimé Auteurs : Daniel Liu, Auteur ; Daniel Moog, Auteur Année de publication : 2020 Article en page(s) : p. 35-37 Langues : Américain (ame) Catégories : Colorants
Dioxyde de titane
Dispersions et suspensions
PigmentsIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The surface chemistry of titanium dioxide dispersions can be controlled via specialized measurements to reduce agglomeration.
Titanium dioxide (TiO2) can be used as a pigment base in applications such as coatings, plastics, and laminates. No matter the application, it is important to avoid the coagulation and agglomeration of the TiO2 dispersion during both the pigment production process and the end-use manufacturing process.
The surface chemistry of TiO2 dispersions can be controlled through the measurement of electrokinetic-sonic-amplitude (ESA) by regulating the pH value (e.g., for avoiding flocculation of the dispersion). This means that the zeta potential of the dispersion should not be or close to zero. Zeta potential is a dimension of the effective surface charge of particles and the interaction between the particles with ions in solution and particles among each other.
Characterizing the absolute surface charge (in an aqueous dispersion) of the TiO2 pigment, negative or positive in the unit (mV), gives a decisive parameter for the ultimate application of the product. The zeta potential depends on the kind of solvent, the nature and amount of the ions in solution (specific conductivity), and the pH value. It is also the main factor that determines the stability of the whole dispersion.Note de contenu : - Testing materials and procedure
- Results and discussion
- Specialized measurement
- Fig. 1 : ESA results : TiO2-pigment surface charge properties control, measure and understandingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34652 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21866 - Périodique Bibliothèque principale Documentaires Disponible