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作 者:Tullio Monetta Annalisa Acquesta Anna Carangelo Nicola Donato Francesco Bellucci
机构地区:[1]Department of Chemical Engineering,Materials and Industrial Production,University of Napoli Federico II,Piazzale Tecchio 80,80125 Napoli,Italy [2]FCA Italy–Avvocato Giovanni Agnelli Plant,Via San Paolo 67/71,10095 Grugliasco(TO),Italy
出 处:《Journal of Magnesium and Alloys》2017年第4期412-422,共11页镁合金学报(英文)
摘 要:The use of magnesium alloys,as a biodegradable medical device,is an interesting challenge for the biomaterials field.Its rapid degradation and the release of hydrogen,when exposed to biological fluids,are the main drawbacks for clinical applications.In this work,a coating made of polydopamine(PDOPA),is used as an intermediate layer to decrease the degradation rate of AZ31 magnesium alloy/polymeric coating system,when exposed to Hank’s solution.Experimental results highlighted:(i)the formation of a thin PDOPA layer,(ii)an increased adhesion in the organic coating/metallic substrate system,(iii)a decrease of two orders of magnitude of the corrosion rate when the PDOPA film is used together with an external organic coating,(iv)the efficacy in the use of PDODA due to the synergistic effect of both,physical and chemical,interactions between the PDOPA layer and the organic coating.
关 键 词:AZ31 POLYDOPAMINE Biodegradable alloy ROUGHNESS Electrochemical characterization Medical device
分 类 号:TG1[金属学及工艺—金属学]
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