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Effective protection for vineyard machines in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 4 (2019)
[article]
Titre : Effective protection for vineyard machines Type de document : texte imprimé Année de publication : 2019 Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Machines agricoles -- Peinture
Métaux -- Revêtements protecteurs
Primaire (revêtement)
Résistance chimique
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : The components of vineyard machines that are used to automate the grape harvest require the best possible corrosion protection, as they are exposed to weather conditions, tartaric acid from the grapes, and chemicals. To ensure this, one manufacturer of these machines relies on a proven system consisting of a primer and a low temperature powder coating as a corrosion protection coating. Note de contenu : - Coating shop integrated into the new factory
- Manual application in two coats
- Fig. 1 : The self-driving grape harvesters are exposed to tartaric acid from the grapes and to other chemicals and therefore require very good corrosion protection
- Fig. 2 : The primer and the top coat are applied manually in a walk-in booth
- Fig. 3 : The primer and powder coating are cured in two ovens at 190°C to 200° for a maximum of 30 minutes
- Fig. 4 : The colors required were accurately reproduced in the laboratoryPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33862
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Code-barres Cote Support Localisation Section Disponibilité 21377 - Périodique Bibliothèque principale Documentaires Disponible Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes / M. Kohl in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
[article]
Titre : Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes Type de document : texte imprimé Auteurs : M. Kohl, Auteur ; A. Kalendova, Auteur ; Pravin P. Deshpande, Auteur ; E. Schmidova, Auteur Année de publication : 2019 Article en page(s) : p. 949-962 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
BenzoatesUn benzoate est un sel de l'acide benzoïque (C6H5COOH ou C7H6O2) qui est un acide carboxylique aromatique dérivé du benzène.
Les benzoates sont notamment utilisés dans l'industrie alimentaire comme additifs :
- Le benzoate de sodium (Na+ + C6H5COO-), référencé en Europe sous le code « E211 »
- Le benzoate de potassium (K+ + C6H5COO-), référencé en Europe sous le code « E212 »
- Le benzoate de calcium (Ca2+ + (C6H5COO-)2), référencé en Europe sous le code « E213 »
Composés lamellaires
Conducteurs organiques
Essais accélérés (technologie)
Formulation (Génie chimique)
Particules (matières)
Polyaniline
Poudres métalliques
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements organiques
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : The objective of this work was to compare the anticorrosion effects of organic coatings containing zinc metal consisting of either lamellar particles or isometric particles and to reduce the zinc metal content of the coatings while preserving their high anticorrosion efficiency. The optimization and Zn metal content reduction can be achieved using zinc with a lamellar particle shape and application of conductive polymers. Conductive polymers are expected to enhance the electrochemical effect of zinc metal in paints. Organic coatings with lamellar zinc particles also exhibit better mechanical properties. Optimization of the amount of zinc lamellar particles could promote a wider use of this material in anticorrosion paints. The conductive polymers used in this work included polyaniline phosphate, polyaniline benzoate, and carbonized polyaniline. A solvent-based epoxy–ester resin served as the binder. Model paints consisting of this resin and containing different concentrations of polyaniline phosphate, polyaniline benzoate, and carbonized polyaniline were prepared. The paints were tested at the critical pigment volume concentration (CPVC) of Zn dust and at lower Zn dust concentrations, specifically 2% below the CPVC. The paints containing combinations of zinc and a conductive polymer contained the sum of the pigments just below the CPVC of the zinc dust species used. This implies a level of 39% of (PVCZn-lam) for the systems with lamellar zinc and a level of 61% of (PVCZn–sf) for the systems with spherical zinc. The pigment volume concentration (PVC) of the conductive polymers in the zinc-containing paints was (based on results obtained previously) 1%, 5%, and 10% in the systems with lamellar zinc and 1%, 5%, 10%, and 15% in the systems with spherical zinc. The organic coatings were subjected to accelerated cyclic corrosion tests and electrochemical measurements. The sample containing polyaniline carbonate (PVC = 1%) and spherical zinc exhibited a significantly lower corrosion rate as compared to that of uncoated steel. Note de contenu : - EXPERIMENTAL PART : Synthesis of conductive polymers - Pigment parameter determination - Specification of the binder for coatings - Formulation and preparation of the organic coatings - Mechanical properties of the paints - Corrosion test procedures - Potentiodynamic polarization studies
- RESULTS AND DISCUSSION : Pigment specification - Evaluation of accelerated corrosion tests - Potentiodynamic polarization studies - Results of adhesion properties of the protective organic coatings - Characterizing the organic coating composition - Summary of the results of the adhesion properties and accelerated corrosion testsDOI : 10.1007/s11998-018-00169-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00169-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32852
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Code-barres Cote Support Localisation Section Disponibilité 21127 - Périodique Bibliothèque principale Documentaires Disponible Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate / Kim Teck Teo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
[article]
Titre : Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate Type de document : texte imprimé Auteurs : Kim Teck Teo, Auteur ; Aziz Hassan, Auteur ; Seng Neon Gan, Auteur Année de publication : 2020 Article en page(s) : p. 1571-1585 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique)
Caractérisation
Copolymère uréthane acrylique
Essai de dureté
Essais accélérés (technologie)
Essais de brouillard salin
Essais dynamiques
Métaux -- Revêtements protecteurs
Poids moléculaires
Résistance à la fissuration
Résistance au chocs
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Transition vitreuse
Vernis -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of four polyol macromers with similar hydroxyl number was prepared by reacting palm fatty acid distillate with neopentaglycol, pentaerythritol, and separate equimolar amounts of isophthalic acid (IPA), terephthalic acid (TPA), phthalic anhydride (PA), and adipic acid (AA). Each macromer was then copolymerized with 2-hydroxylethyl acrylate (2-HEA) and toluene diisocyanate to produce the UV curable resins labeled as UA-IPA, UA-TPA, UA-PA, and UA-AA, respectively. The glass transition temperature (Tg), pendulum hardness, and adhesion properties of the cured films were studied. In general, all the resins produced coatings with high gloss and good adhesion. When accelerated weathering tests were carried out, films of UA-TPA could withstand UVA exposure up to 1500 h. When subjected to methyl ethyl ketone double rub test, cured films of UA-IPA and UA-TPA could withstand the highest double rubs at 90 times, followed by UA-PA and UA-AA at 45 and 15 times, respectively. Under salt spray corrosion test for 720 h, cured films showed good corrosion resistance with no observable blistering, except for UA-AA that showed slight blistering. Excellent water resistance was achieved by all cured films with good adhesion and minimal gloss reduction. Note de contenu : - EXPERIMENTS : Materials - Synthesis of hydroxyl terminated macromer - Urethane acrylate resins (UA) - Clearcoat formulation - Application of UA clearcoat on metal panel - FTIR analysis - Molecular weight measurement - Glass transition measurement - Pendulum hardness - Acid value and isocyanate value - Hydroxyl number - Adhesion performance - Pencil hardness - Gloss measurement - Flexibility of coating by T-bend test - Resistance of cracking by impact deformation - Cured film durability by QUV-A accelerated weathering test - Resistance of coating to MEK - Water resistance test - Monitoring of UV curing - UV-curable UA resin in metal coating application
- RESULTS AND DISCUSSION : Synthesis of macromer - Synthesis of UA-IPA, UA-TPA, UA-PA and UA-AA - UV Curing of resins - Change in Tg during UV curing - Pendulum hardness analysis of cured film - Physical and mechanical performance of UV cured film in metal coating - Film flexibility by T-bend test - Cracking resistance of the UV cured film by impact deformation - Solvent resistance of the UV cured film - Durability of UV cured film - Performance of water resistance of the UV cured filmDOI : https://doi.org/10.1007/s11998-020-00379-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00379-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34961
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Code-barres Cote Support Localisation Section Disponibilité 22458 - Périodique Bibliothèque principale Documentaires Disponible Effects of hydrotalcite intercalated with corrosion inhibitor on cathodic disbonding of epoxy coatings / Thi Xuan Hang To in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 2 (03/2015)
[article]
Titre : Effects of hydrotalcite intercalated with corrosion inhibitor on cathodic disbonding of epoxy coatings Type de document : texte imprimé Auteurs : Thi Xuan Hang To, Auteur ; Nguyen Thuy Duong, Auteur ; Anh Truc Trinh, Auteur ; Hoang Thai, Auteur ; Dinh Thi Mai Thanh, Auteur ; Siriporn Daopiset, Auteur ; Anothai Boonplean, Auteur Année de publication : 2015 Article en page(s) : p. 375-383 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Décollement cathodique (revêtement)
Epoxydes
Essais d'adhésion
Essais de brouillard salin
Hydrotalcites
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, zinc aluminum hydrotalcite intercalated with 2-benzothiazolylthio-succinic acid (BTSA) as a container of corrosion inhibitor was prepared and incorporated in an epoxy coating. The HT-BTSA obtained was characterized using infrared spectroscopy and X-ray diffraction. BTSA release from HT-BTSA in 0.5 M NaCl solution was investigated using UV–Vis spectroscopy. The corrosion protection performance of the epoxy coating containing HT-BTSA was evaluated and compared to the pure epoxy coating and the epoxy coating containing HT by cathodic disbonding test, electrochemical impedance spectroscopy, salt spray test, and adhesion measurement. It was shown that the BTSA was intercalated in hydrotalcite and its loading was about 33.5%. The BTSA release from HT-BTSA increased with the pH of the NaCl solution. It was also shown that the presence of HT or HT-BTSA in epoxy coating improved the resistance to cathodic disbonding and the adhesion of the epoxy coating. Corrosion protection performance of epoxy coating containing HT-BTSA was higher than that of epoxy coating containing HT. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of hydrotalcite - Preparation of hydrotalcite intercalated with BTSA - Preparation of epoxy coatings - Analytical characterizations - BTSA release from HT-BTSA - Electrochemical characterization - Salt spray test - Adhesion measurement
- RESULTS AND DISCUSSION : Characterization of HT-BTSA - Release of BTSA from HT-BTSA - Cathodic disbonding test - Salt spray test - Adhesion measurementsDOI : 10.1007/s11998-014-9642-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9642-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23661
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Code-barres Cote Support Localisation Section Disponibilité 17119 - Périodique Bibliothèque principale Documentaires Disponible Effects of hydroxyapatite coatings on enhanced corrosion protection and cytocompatibility of high-purity magnesium / Qingyun Fu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 6 (11/2022)
[article]
Titre : Effects of hydroxyapatite coatings on enhanced corrosion protection and cytocompatibility of high-purity magnesium Type de document : texte imprimé Auteurs : Qingyun Fu, Auteur ; Mingcheng Feng, Auteur ; Jian Li, Auteur ; Nian He, Auteur ; Wenjing Li, Auteur ; Jingyao Li, Auteur ; Junjie Yang, Auteur ; Weihong Jin, Auteur ; Wei Li, Auteur ; Zhentao Yu, Auteur Année de publication : 2022 Article en page(s) : p. 1757-1771 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Biocompatibilité
HydroxyapatiteL'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate.
L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte.
Implants médicaux
Implants orthopédiques
MagnésiumLe magnésium est l'élément chimique de numéro atomique 12, de symbole Mg.
Le magnésium est un métal alcalino-terreux. Il s’agit du neuvième élément le plus abondant de l'univers
. Il est le produit, dans de grandes étoiles vieillissantes, de l'addition séquentielle de trois noyaux d'hélium à un noyau carbo. Lorsque de telles étoiles explosent en tant que supernovas, une grande partie du magnésium est expulsé dans le milieu interstellaire où il peut se recycler dans de nouveaux systèmes stellaires. Le magnésium est le huitième élément le plus abondant de la croûte terrestreet le quatrième élément le plus commun de la Terre (après le fer, l'oxygène et le silicium), constituant 13 % de la masse de la planète et une grande partie du manteau de la planète. C'est le troisième élément le plus abondant dissous dans l'eau de mer, après le sodium et le chlore.
Les atomes de magnésium existent dans la nature uniquement sous forme de combinaisons avec d'autres éléments, où il présente invariablement l'état d'oxydation +2. L'élément pur est produit artificiellement par réduction ou électrolyse. Il est hautement réactif en poudre et en copeaux mais, laissé à l'air libre, il se revêt rapidement d'une mince couche d'oxyde étanche réduisant sa réactivité (passivation par oxydation). Le métal pur brûle aisément sous certaines conditions (en produisant une lumière brillante, blanche, éblouissante caractéristique). En mécanique il est utilisé principalement comme composant dans les alliages d'aluminium-magnésium (parfois appelés magnalium). Le magnésium est moins dense que l'aluminium et l'alliage est apprécié pour sa légèreté et sa résistance plus grande (mécanique et chimique). (Wikipedia)
Métaux -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Magnesium (Mg) and its alloys are promising materials for temporary biomedical implants such as bone fracture fixation devices. Unfortunately, rapid degradation in the physiological environment and cytotoxicity have impeded their clinical use. Hydroxyapatite (HA) coatings synthesized via ethylenediaminetetraacetic acid calcium disodium salt hydrate (EDTA-Ca) and potassium dihydrogen phosphate (KH2PO4) have emerged as one effective strategy to enhance the corrosion resistance and biocompatibility of Mg and its alloys. However, effects of the concentrations of EDTA-Ca and KH2PO4 on the morphology, corrosion protection, and biocompatibility of HA coatings remain unclear. In this study, the morphology, thickness, corrosion protection, and cytocompatibility of the HA coatings fabricated on high-purity Mg with different concentrations of the synthetic solution are investigated. Our results show that the fabricated coatings are composed of a dome-shaped outer HA layer and an inner Mg(OH)2 layer. With decreasing the concentrations of the synthetic solution, the HA and Mg(OH)2 layers become thinner and thicker, respectively, and the corrosion resistance and cytocompatibility of the coated Mg become better. The formation mechanism of the prepared coatings and relationships between the concentrations of the synthetic solution and the corrosion and biological characteristics are also discussed. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Coating preparation - Surface and cross-sectional characterization - Corrosion characterization - In vitro biological experiments - Statistical analysis
- RESULTS : Surface and cross-sectional characterization - Corrosion behavior - In vitro cytocompatibility
- DISCUSSION : Discussion - Formation mechanism of the HA coatings - Effects of the HA coatings on corrosion resistance of high-purity Mg - Cytocompatibility
- Table 1 : Concentrations of the solutions for the preparation of coatings and corresponding names of the obtained specimens
- Table 2 : Ecorr, icorr, and βc of Mg, Mg-0.05HA, Mg-0.15HA, and Mg-0.25HA in SBF
- Table 3 : Fitted electrochemical parameters of the EIS plotsDOI : https://doi.org/10.1007/s11998-022-00646-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00646-6.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38495
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 6 (11/2022) . - p. 1757-1771[article]Réservation
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