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Title

Comparative study of the corrosion behavior of MA-956 and conventional metallic biomaterials

AuthorsEscudero Rincón, María Lorenza; López, María Francisca ; Ruiz, J.; García-Alonso, M. C.; Canahua, H.
Issue DateJul-1996
PublisherWiley-VCH
CitationJournal of Biomedical Materials Research - Part B Applied Biomaterials 31(31): 313-317 (1996)
AbstractIn this work the corrosion behavior of a new biomaterial, the MA-956 superalloy, immersed in Hank's solution is evaluated. A comparison with conventional metallic alloys used as articular implants is established. To determine the corrosion behavior we employed electrochemical methods: evaluation of corrosion potential E(corr), electrochemical impedance spectroscopy (EIS), and anodic polarization curves. The corrosion resistance of the MA-956 superalloy preoxidized at 1100°C during 100 h is at least two orders of magnitude higher than for the other alloys. This satisfactory behavior is stationary with time. Also the probability of the appearance of the pitting corrosion process is very low. When cracking is generated in the α-alumina layer the repassivation process is assured because of the high Cr content in the superalloy. This study is the first step in proposing this new alloy as a biomaterial. The low toxicity of these metallic alloys in the physiological environment suggests that in vivo their biocompatibility could be satisfactory. | In this work the corrosion behavior of a new biomaterial, the MA-956 superalloy, immersed in Hank's solution is evaluated. A comparison with conventional metallic alloys used as articular implants is established. To determine the corrosion behavior we employed electrochemical methods: evaluation of corrosion potential Ecorr, electrochemical impedance spectroscopy (EIS), and anodic polarization curves. The corrosion resistance of the MA-956 superalloy preoxidized at 1100°C during 100 h is at least two orders of magnitude higher than for the other alloys. This satisfactory behavior is stationary with time. Also the probability of the appearance of the pitting corrosion process is very low. When cracking is generated in the α-alumina layer the repassivation process is assured because of the high Cr content in the superalloy. This study is the first step in proposing this new alloy as a biomaterial. The low toxicity of these metallic alloys in the physiological environment suggests that in vivo their biocompatibility could be satisfactory.
Publisher version (URL)https://doi.org/10.1002/(SICI)1097-4636(199607)31:3<313::AID-JBM4>3.0.CO;2-P
URIhttp://hdl.handle.net/10261/85366
DOI10.1002/(SICI)1097-4636(199607)31:3<313::AID-JBM4>3.0.CO;2-P
Identifiersissn: 0021-9304
Appears in Collections:(CENIM) Artículos
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