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.
ACS Appl Mater Interfaces. 2017 Feb 1;9(4):4231-4243. doi: 10.1021/acsami.6b14174. Epub 2017 Jan 20.
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.
有机聚合物被广泛用作金属表面的涂层和胶黏剂，但由于铝表面的快速氧化钝化，铝是最难处理的基底之一。通过铜催化的叠氮化物-炔烃环加成反应制成的聚（1,4-二取代 1,2,3-三唑）与几种金属基底形成了强结合界面。在这项工作中，研究了各种炔烃和叠氮单体作为标准高强度铝合金防腐涂层的前体。发现具有相对低原子价的单体（二叠氮化物和三炔烃）作为电解质向铝表面转移的优异阻挡层。这些材料由于三种互补特性的结合，表现出优异的抗腐蚀性点蚀能力：良好的高交联膜形成，如傅里叶变换红外光谱和差示扫描量热法所观察到的；如剥离测试所示的与铝合金基底的良好附着力；以及如电化学阻抗谱所示的优异的不渗透性。
