Corrosion inhibitors for maintenance and light duty applications : waterborne alkyds / Tony Gichuhi in PAINTINDIA, Vol. LXI, N° 6 (06/2011)

[article]  inPAINTINDIA > Vol. LXI, N° 6 (06/2011) . - p. 69-75 Titre : Corrosion inhibitors for maintenance and light duty applications : waterborne alkyds Type de document : texte imprimé Auteurs : Tony Gichuhi, Auteur Année de publication : 2011 Article en page(s) : p. 69-75 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Dilution Dispersions et suspensions Epoxydes Esters Polyalkydes Revêtements en phase aqueuse:Peinture en phase aqueuse Triéthylamine Index. décimale : 667.9 Revêtements et enduits Résumé : For several years now wateborne coatings have gained acceptance as alternatives to solventborne coatings. For light duty and industrial maintenance coatings for metal, water reducible alkyds and water dispersible alkyds are acceptable alternatives to solvent-based alkyds. Water-dispersible alkyds are made dispersible by neutralizing the acid moieties of the alkyd with ammonia or water soluble amines such as triehylamine. Water reducible and dispersible alkyds (to a lesser extent) are susceptible to hydrolysis and furthermore destabilization by basic multivalent cations such as those found in corrosion inhibiting pigments. The hydrolytic instability translates to limited storage time. This paper highlights research to develop corrosion inhibitors for both types of waterborne alkyds and adresses strategies to overcome stability problems inherent in these systems. Note de contenu : - General comparison of water reducible & water dispersible alkyds - Corrosion comparison of waterborne alkyds - Corrosion inhibitors in water reducible epoxy ester (WREE) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11850 [article]

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Ecofriendly corrosion inhibiting additives for tomorrow's coatings / Tony Gichuhi in PAINTINDIA, Vol. LXIII, N° 7 (07/2013)

[article]  inPAINTINDIA > Vol. LXIII, N° 7 (07/2013) . - p. 100-107 Titre : Ecofriendly corrosion inhibiting additives for tomorrow's coatings Type de document : texte imprimé Auteurs : Tony Gichuhi, Auteur Année de publication : 2013 Article en page(s) : p. 100-107 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Composés organiques Polymères Revêtements -- Additifs:Peinture -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Until recently heavy metal based corrosion inhibitors were widely accepted as the only materials that could provide the corrosion protection needed. Corrosion inhibitors provide an indispensable function to protective coatings. The performance of a coating under corrosive conditions requires that corrosion inhibitors provide sustainable protection during the coatings warranty. The coating industry however is challenged to be more cognizant of the impact toxic metals have on human health and the environment. In response to the European Directive 1999/45/EC Advancement of Technical Progress (ATP) amendment 29 effective October 2005, products containing zinc oxide and zinc phosphate required hazardous label ing due to their marine toxicity. The growing pressure to replace zinc, barium, strontium and other heavy metals has shifted the coatings pendulum to more ecofriendly alternatives. This paper captures specific products reflecting the new paradigm of technologies based on heavy-metal free inorganic pigments as well as non-toxic organic corrosion inhibitors. Note de contenu : - NON-TOXIC INORGANIC CORROSION INHIBITORS - INORGANIC CORROSION INHIBITORS : HOW DO THEY WORK ? A. Anodic and cathodic passivation - B. Improved barrier properties - NEW GENERATION OF ZINC-FREE INORGANIC CORROSION INHIBITORS : Unique characteristics of hybrid A - ORGANIC INHIBITORS : ANOTHER ALTERNATIVE TO HEAVY METAL CORROSION INHIBITORS - ORGANIC INHIBITORS : HOW DO THEY WORK : A. Improved barrier properties - B. Anodic passivation - C. Improved adhesion - D. Wetting - E. Decreased coating imperfections - ORGANIC CORROSION INHIBITORS - SOME FORMULATING TIPS - INORGANIC-ORGANIC CORROSION INHIBITOR SYNERGY - Schematic mechanism of a direct, non-toxic inorganic corrosion inhibitor - Table 1 : Attributes of hybrid A - Table 2 : Attributes of organic corrosion inhibitors Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19655 [article]

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Hybrid sol-gel corrosion inhibitors / Tony Gichuhi in COATINGS TECH, Vol. 6, N° 4 (04/2009)  

[article]  inCOATINGS TECH > Vol. 6, N° 4 (04/2009) . - p. 24-29 Titre : Hybrid sol-gel corrosion inhibitors : A novel approach to corrosion inhibitors for coatings Type de document : texte imprimé Auteurs : Tony Gichuhi, Auteur ; Andrew Balgeman, Auteur ; Amanda Adams, Auteur ; Shonda Prince, Auteur Année de publication : 2009 Article en page(s) : p. 24-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Matériaux hybrides Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion inhibitors provide an indispensable function to protective coatings. Heavy metal-based corrosion inhibitors were widely acclaimed as the best materials to provide corrosion protection to coatings. The performance of a coating under corrosive conditions requires that corrosion inhibitors provide reliable and sustainable protection during the coatings lifetime. Today, the industry is challenged to be more conscious of the impact that toxic metals have on human health and on other ecosystems. Sol-gel technology offers an eco-friendly alternative to the use of toxic metals (Cr VI, Cd, Pb, Cu, Ni, and Zn). This article highlights research in new sol-gel based corrosion inhibitors for use in paint as well as for use in the pretreatment of bare metals (e.g., steel, aluminum, silver). Sol-gel technology particularly affords superior corrosion protection in thin film coatings (< 25 µm dry), an area that up to now has been dominated by Cr-based anticorrosives. This technology is applicable to most waterborne and solventborne finishes, high gloss direct-to-metal coatings, conventional primers, acrylic clearcoats, fast drying lacquers, wash primers, anti-fingerprint, and conversion coatings. En ligne : https://drive.google.com/file/d/132tqfII8nWCFv3SBSWPp8jNEukme0Ec2/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5660 [article]

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Improved corrosion control through nontoxic corrosion inhibitor synergies / Andrew Thorn in COATINGS TECH, Vol. 3, N° 5 (05/2006)  

[article]  inCOATINGS TECH > Vol. 3, N° 5 (05/2006) . - p. 24-30 Titre : Improved corrosion control through nontoxic corrosion inhibitor synergies Type de document : texte imprimé Auteurs : Andrew Thorn, Auteur ; Amanda Adams, Auteur ; Tony Gichuhi, Auteur ; Wendy Novelli, Auteur ; Mary Ann Sapp, Auteur Année de publication : 2006 Article en page(s) : p. 24-30 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : The idea of anticorrosive synergies is not a new concept but one that still holds a lot of promise for advancing the performance of environmentally compliant protective coatings. The most environmentally sound method for surpassing the high anticorrosion standards set by toxic inhibitors such as lead- and chrome-base inhibitors is through the gains provided by nontoxic corrosion inhibitors synergies. In order to realize the benefits that exist from combining inhibitor chemistries, one must first understand the mechanisms surrounding corrosion, the inhibitors themselves, and the key formulating guidelines required for success. “Solubility optimization” of the inhibitors in the coating film is an important factor for improving anticorrosive performance. Resin type and formula parameters play a significant role in inhibitor selection and use level. This synergistic approach for improving performance also carries through to other components such as extender pigments and additives. Once the synergistic balance is achieved, the results are a clear indication of the power of this theory. En ligne : https://drive.google.com/file/d/15alwCgseMTGB1JGqpLHa31FpuVNxxiRU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5486 [article]

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Organic corrosion inhibitors in waterborne paint coatings / Brylee David B. Tiu in COATINGS TECH, Vol. 13, N° 8 (08/2016)  

[article]  inCOATINGS TECH > Vol. 13, N° 8 (08/2016) . - p. 36-45 Titre : Organic corrosion inhibitors in waterborne paint coatings Type de document : texte imprimé Auteurs : Brylee David B. Tiu, Auteur ; Silicy B. Tiu, Auteur ; Jennifer R. Wang, Auteur ; R. C. Advincula, Auteur ; Simonida Grubjesic, Auteur ; Anthony F. Toussaint, Auteur ; Nathan Kofira, Auteur ; Tony Gichuhi, Auteur Année de publication : 2016 Article en page(s) : p. 36-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse électrochimique Anticorrosifs Anticorrosion Essais (technologie) Polyacryliques Réflexion totale atténuée Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Spectroscopie Raman Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : The cost of corrosion in one of the biggest economic challenges in a number of industries worldwide. Although complete eradication of corrosion is impossible, significant reductionin the corrosion rate can be achieved using various corrosion mitigation techniques, most notably using protective polymeric coatings. In this regard, the eco-friendly properties of waterborne paints have been attracting widespread attention in recent years due to the promulgation of lower allowable volatile organic compound content. However, these coatings are prone to increased penetration of moisture and corrosive species. To improve the protective properties of the coating we incorporated two non-toxic organic corrosion additives into a waterborne acrylic paint formulation and evaluated their anticorrosion properties using a combination of electrochemical tests, microscopy, and spectroscopic techniques. Note de contenu : - EXPERIMENTAL : Corrosion-resistant paint formulation and sample preparation - Electrochemical corrosion testing - Surface morphology - Attenuated total reflectance-infrared (ATR-IR) and Raman spectroscopy - RESULTS AND DISCUSSION : Open-circuit potential measurements - Immersion test En ligne : https://drive.google.com/file/d/1TZmjy9pLtqCKApsSQ3EkdDfS_grDN4Nf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27046 [article]

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