title: Protective Coatings for Aluminum Alloy Based on Hyperbranched 1,4-Polytriazoles.
abstract: Organic polymers are widely used as coatings and adhesives to metal surfaces, but aluminum is among the most difficult substrates because of rapid oxidative passivation of its surface. Poly(1,4-disubstituted 1,2,3-triazoles) made by copper-catalyzed azide-alkyne cycloaddition form strongly bonded interfaces with several metal substrates. In this work, a variety of alkyne and azide monomers were explored as precursors to anticorrosion coatings for a standard high-strength aluminum-copper alloy. Monomers of comparatively low valency (diazide and trialkyne) were found to act as superior barriers for electrolyte transfer to the aluminum surface. These materials showed excellent resistance to corrosive pitting due to the combination of three complementary properties: good formation of highly cross-linked films, as observed by Fourier transform infrared spectroscopy and differential scanning calorimetry; good adhesion to the aluminum alloy substrate, as shown by pull-off testing; and excellent impermeability, as demonstrated by electrochemical impedance spectroscopy.
authors.affiliation: Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya , C/Eduard Maristany, 10-14, Ed. I2, 08019 Barcelona, Spain.|Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya , Campus Sud, Edifici C', C/Pasqual i Vila s/n, 08028 Barcelona, Spain.
authors.forename: Elaine
authors.identifier: http://orcid.org/0000-0002-0658-7696
authors.initials: E
authors.lastname: Armelin
authors.affiliation: Institut für Organische Chemie, Universität Regensburg , Universitätsstr. 31, 93040 Regensburg, Germany.
authors.forename: Rory
authors.initials: R
authors.lastname: Whelan
authors.affiliation: Institut für Organische Chemie, Universität Regensburg , Universitätsstr. 31, 93040 Regensburg, Germany.
authors.forename: Yeimy Mabel
authors.initials: YM
authors.lastname: Martínez-Triana
authors.affiliation: Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya , C/Eduard Maristany, 10-14, Ed. I2, 08019 Barcelona, Spain.|Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya , Campus Sud, Edifici C', C/Pasqual i Vila s/n, 08028 Barcelona, Spain.
authors.forename: Carlos
authors.identifier: http://orcid.org/0000-0003-4462-6075
authors.initials: C
authors.lastname: Alemán
authors.affiliation: School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: M G
authors.identifier: http://orcid.org/0000-0001-8247-3108
authors.initials: MG
authors.lastname: Finn
authors.affiliation: Institut für Organische Chemie, Universität Regensburg , Universitätsstr. 31, 93040 Regensburg, Germany.|IQAC-CSIC , Jordi Girona 18-26, 08034 Barcelona, Spain.
authors.forename: David Díaz
authors.initials: DD
authors.lastname: Díaz
keywords: adhesion property; aluminum alloy; click chemistry; copper-catalyzed azide−alkyne cycloaddition; corrosion protection