15 résultat(s) recherche sur le tag 'exposition'

Acid etch of automotive clearcoats. II. Comparison of degradation chemistry in laboratory and field testing / P. J. Schmitz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 902 (03/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 902 (03/2000) . - p. 53-61 Titre : Acid etch of automotive clearcoats. II. Comparison of degradation chemistry in laboratory and field testing Type de document : texte imprimé Auteurs : P. J. Schmitz, Auteur ; Joseph W. Holubka, Auteur ; Li - Feng Xu, Auteur Année de publication : 2000 Article en page(s) : p. 53-61 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau  revêtement  Vernis  Automobile  Dégradation  chimique  Exposition  intempérie  Retombée  atmosphérique  Pluie  acide  Essai  laboratoire  en  champ  Etude  comparative  expérimentale  Spectrométrie  photoélectron  Rayon  X Index. décimale : 667.9 Revêtements et enduits Résumé : A laboratory test procedure was developed to quantitatively evaluate the acid etch resistance of automotive clearcoats, Here we attempt to verify that the conditions used in the laboratory test reproduce the field degradation chemistry to assure that the test is evaluating realistic performance characteristics. In this study we applied X-ray photoelectron spectroscopy (XPS) as a tool to determine if degradation products are observable which can be used to verify the consistency of the field and laboratory degradation processes for acrylic melamine-based clearcoats. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5822 [article]

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001207	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Anticipating paint cracking / Mark E. Nichols in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 924 (01/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 924 (01/2002) . - p. 39-46 Titre : Anticipating paint cracking : The application of fracture mechanics to the study of paint weathering Type de document : texte imprimé Auteurs : Mark E. Nichols, Auteur Année de publication : 2002 Article en page(s) : p. 39-46 Note générale : bibliogr. Langues : Américain (ame) Tags : Essai  vieillissement  Mécanique  rupture  Fissuration  Feuil  Exposition  intempérie  Dégradation  Industrie  automobile  Vernis  Peinture  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : The relationships between the fracture energy (Gc), film thickness, stress level, and weathering time were investigated for a number of automotive clearcoats. As weathering progressed, most clearcoats embrittled due to the combined effects of photooxidation, hydrolysis, and other degradation mechanisms. This embrittlement was measured and related to the chemical composition changes that take place in the clearcoat during weathering. When the fracture energy dropped below the driving energy for cracking, G, brittle cracking occurred. The driving force for cracking was shown to depend on stress level and film thickness. The importance of fatigue loading was also qualitatively investigated. These techniques were successfully used to anticipate the long-term weathering behavior of automative clearcoats. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5679 [article]

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Atmospheric corrosion behavior of paint systems applied on weathered hot-dip galvanized steel / D. de La Fuente in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 935 (12/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 935 (12/2002) . - p. 59-68 Titre : Atmospheric corrosion behavior of paint systems applied on weathered hot-dip galvanized steel Type de document : texte imprimé Auteurs : D. de La Fuente, Auteur ; M. Morcillo, Auteur ; J. Simancas, Auteur ; L. S. Hernandez, Auteur ; J. L. Ruiz, Auteur Année de publication : 2002 Article en page(s) : p. 59-68 Note générale : Bibliogr. Langues : Américain (ame) Tags : Etude  expérimentale  Essai  longue  durée  Corrosion  atmosphérique  Peinture  anticorrosion  Matériau  revêtement  Protection  corrosion  Exposition  intempérie  Acier  galvanisé Index. décimale : 667.9 Revêtements et enduits Résumé : The durability of a paint coating applied on a galvanized steel surface which has been exposed for a certain time to the atmosphere depends on the aggressiveness of the atmosphere, the preparation of the weathered surface prior to painting, and the type of coating applied. This work presents the results of an atmospheric corrosion study carried out over 11 years in three Spanish atmospheres of highly different degrees of aggressiveness (Madrid, Bilbao, and Tenerife), applying eight paint coatings on galvanized steel weathered in different conditions and using different methods to prepare the aged metallic surface prior to painting. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5616 [article]

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Colorant-induced exterior discoloration of latex paints / Lakshmi Sadasivan in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 920 (09/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 920 (09/2001) . - p. 81-86 Titre : Colorant-induced exterior discoloration of latex paints Type de document : texte imprimé Auteurs : Lakshmi Sadasivan, Auteur ; Usha R. Gandhi, Auteur Année de publication : 2001 Article en page(s) : p. 81-86 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau  revêtement  Peinture  eau  émulsion  Feuil  Exposition  intempérie  Dégradation  chimique  Décoloration  Colorant  Pigment  minéral  Titane  Oxyde  Etude  expérimentale Index. décimale : 667.9 Revêtements et enduits Résumé : Exterior discoloration of latex paint films has been attributed to known causes such as tannin and stain bleeding, mildew and sap staining, color fading and chalking due to certain pigments, and yellowing due to mildewcides and alkyd modification. This paper refers to exterior discoloration of latex paint films containing specific colorant(s). A simple and quick method was adopted to screen paint formulations that may discolor upon exposure to sunlight and water. The exterior discoloration of latex paint films tinted with raw umber colorant is primarily dependent on the manganese oxide(s) present as impurity in the colorant. The role of titanium dioxide in discoloration of raw umber containing latex paint films is also demonstrated. Using this method, the grades of titanium dioxide could be differentiated that facilitate exterior discoloration. A clear correlation was established between the types of surface treatment on titanium dioxide pigment (alumina, zirconia, or silica) versus colorant-dependent discoloration. The investigation demonstrates that the colorant-dependent discoloration is independent of binders, pigment volume concentrations, and mildewcide used in a formulation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5764 [article]

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Computer analysis of a polymer coating exposed to field weather conditions / Doug Burch in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 924 (01/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 924 (01/2002) . - p. 75-86 Titre : Computer analysis of a polymer coating exposed to field weather conditions Type de document : texte imprimé Auteurs : Doug Burch, Auteur ; Jonathan W. Martin, Auteur ; Mark R. VanLandingham, Auteur Année de publication : 2002 Article en page(s) : p. 75-86 Note générale : Bibliogr. Langues : Américain (ame) Tags : Simulation  numérique  Modélisation  Transfert  masse  chaleur  Feuil  Dégradation  photochimique  Exposition  intempérie  Peinture  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : A heat and moisture transfer model was used to study weathering of polymeric materials, such as paint, asphalt, sealants, plastics, textiles, and poly meric composites. Three damage indices, related to temperature changes, humidity changes, and time of wetness, respectively, were introduced to quantify adverse effects of climate. The variation of these indices was investigated for a hot and humia climate (Miami, FL) and a hot and dry climate (Phoenix, AZ). In addition, the relative effects of solar radiation, surface wetting by rain and dew condensation, and variations in outdoor tempera ture and relative humidity on the three damage indices were investigated. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5684 [article]

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001232	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Mechanical property changes and degradation during accelerated weathering of polyester-urethane coatings / allen Skaja in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

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Microstructure and morphology of amine-cured epoxy coatings before and after outdoor exposures - an AFM study / Xiaohong Gu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)  

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Perspectives on weatherability testing of automotive coatings / David R. Bauer in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 924 (01/2002)

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Relating laboratory and outdoor exposure of coatings : II. Effects of relative humidity on photodegradation and the apparent quantum yield of acrylic - melamine coatings / Tinh Nguyen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 932 (09/2002)

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Restoration of severely weathered wood / R. Sam Williams in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 902 (03/2000)

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Revêtements à usages extérieur - Essai de vieillissement artificiel - Norme NF T 30-049 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1985)

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Testing accelerated weathering tests for appropriate weathering chemistry : Ozone filtered xenon arc / J. L. Gerlock in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 936 (01/2003)

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Use of laser scanning confocal microscopy for characterizing changes in film thickness and local surface morphology of UV-exposed polymer coatings / Li-Piin Sung in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)  

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Validation of the reciprocity law for coating photodegradation / Joannie W. Chin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)  

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Wood properties affecting finish service life / R. Sam Williams in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 902 (03/2000)

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