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Corrosion and self-healing behaviour of AZ91D magnesium alloy in ethylene glycol/water solutions / L. Wang in Materials and corrosion, Vol. 63 N° 8 (Août 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 713–719 Titre : Corrosion and self-healing behaviour of AZ91D magnesium alloy in ethylene glycol/water solutions Type de document : texte imprimé Auteurs : L. Wang, Auteur ; T. Zhou, Auteur ; J. Liang, Auteur Année de publication : 2013 Article en page(s) : pp. 713–719 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : AZ91D  magnesium  alloys;  corrosion  behaviour;  ethylene  glycol;  self-healing  behaviour Résumé : Corrosion behaviour of magnesium alloy-based engine parts in cooling system is an urgent fundamental issue in automotive field where magnesium alloys are increasingly used. In the present work, the corrosion behaviour of AZ91D magnesium alloys in various ethylene glycol/water solutions was studied by electrochemical measurements and immersion tests at room temperature. The surfaces of the samples after immersion tests were examined using scanning electron microscope (SEM) and X-ray diffraction (XRD). The results showed that the corrosion rates of AZ91D magnesium alloys decreased with the increase of ethylene glycol concentration in ethylene glycol/water solutions and the corrosion process was dominated by pitting corrosion. A continuous protective film transferred from corrosion products was formed on the corroded surface after sufficient immersion duration in ethylene glycol/water solutions, which is able to heal the corrosion pits. The self-healing behaviour inhibited the further corrosion of AZ91D magnesium alloy. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106131/abstract [article] Corrosion and self-healing behaviour of AZ91D magnesium alloy in ethylene glycol/water solutions [texte imprimé] / L. Wang, Auteur ; T. Zhou, Auteur ; J. Liang, Auteur . - 2013 . - pp. 713–719. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 713–719 Mots-clés : AZ91D  magnesium  alloys;  corrosion  behaviour;  ethylene  glycol;  self-healing  behaviour Résumé : Corrosion behaviour of magnesium alloy-based engine parts in cooling system is an urgent fundamental issue in automotive field where magnesium alloys are increasingly used. In the present work, the corrosion behaviour of AZ91D magnesium alloys in various ethylene glycol/water solutions was studied by electrochemical measurements and immersion tests at room temperature. The surfaces of the samples after immersion tests were examined using scanning electron microscope (SEM) and X-ray diffraction (XRD). The results showed that the corrosion rates of AZ91D magnesium alloys decreased with the increase of ethylene glycol concentration in ethylene glycol/water solutions and the corrosion process was dominated by pitting corrosion. A continuous protective film transferred from corrosion products was formed on the corroded surface after sufficient immersion duration in ethylene glycol/water solutions, which is able to heal the corrosion pits. The self-healing behaviour inhibited the further corrosion of AZ91D magnesium alloy. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106131/abstract

Synthesis of a water-soluble siloxane copolymer and its application for antimicrobial coatings / L. Kou in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6521–6526 Titre : Synthesis of a water-soluble siloxane copolymer and its application for antimicrobial coatings Type de document : texte imprimé Auteurs : L. Kou, Auteur ; J. Liang, Auteur ; X. Ren, Auteur Année de publication : 2009 Article en page(s) : pp. 6521–6526 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : N-halamine  siloxane  Quaternary  ammonium  salt  siloxane  Copolymers  5,5-dimethylhydantoin  Trimethylamine Résumé : Copolymers of an N-halamine siloxane and a quaternary ammonium salt siloxane were prepared using 5,5-dimethylhydantoin and trimethylamine as functional groups. The solubility of this siloxane copolymer in water was dramatically improved over that of a hydantoinyl siloxane homopolymer developed earlier. The biocidal activity of cotton swatches coated with the copolymer was evaluated against S. aureus and E. coli O157:H7; the antimicrobial fabric with 0.23%−0.26% chlorine loading could inactivate 107 colony forming units (CFU) of bacteria within 1−5 min of contact. It was observed that a 1 wt % coating bath could provide a coating that could be chlorinated to greater than a 0.20% chlorine loading for a copolymer having a 9:1 ratio of hydantoin to quat moieties. The stability of the oxidative chlorine loading on the cotton swatches was not affected by the presence of the very hydrophilic quat functional group. Use of the copolymer in an antimicrobial coating application will be desirable because no organic solvent is needed for the preparation of a coating bath for textile materials. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8017302 [article] Synthesis of a water-soluble siloxane copolymer and its application for antimicrobial coatings [texte imprimé] / L. Kou, Auteur ; J. Liang, Auteur ; X. Ren, Auteur . - 2009 . - pp. 6521–6526. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6521–6526 Mots-clés : N-halamine  siloxane  Quaternary  ammonium  salt  siloxane  Copolymers  5,5-dimethylhydantoin  Trimethylamine Résumé : Copolymers of an N-halamine siloxane and a quaternary ammonium salt siloxane were prepared using 5,5-dimethylhydantoin and trimethylamine as functional groups. The solubility of this siloxane copolymer in water was dramatically improved over that of a hydantoinyl siloxane homopolymer developed earlier. The biocidal activity of cotton swatches coated with the copolymer was evaluated against S. aureus and E. coli O157:H7; the antimicrobial fabric with 0.23%−0.26% chlorine loading could inactivate 107 colony forming units (CFU) of bacteria within 1−5 min of contact. It was observed that a 1 wt % coating bath could provide a coating that could be chlorinated to greater than a 0.20% chlorine loading for a copolymer having a 9:1 ratio of hydantoin to quat moieties. The stability of the oxidative chlorine loading on the cotton swatches was not affected by the presence of the very hydrophilic quat functional group. Use of the copolymer in an antimicrobial coating application will be desirable because no organic solvent is needed for the preparation of a coating bath for textile materials. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8017302