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In vitro corrosion of pure Mg in phosphate buffer solution-Influences of isoelectric point and molecular structure of amino acids
Wang, Yu; Ding, Bao-Hua; Gao, Shi-Yu; Chen, Xiao-Bo; Zeng, Rong-Chang; Cui, Lan-Yue; Li, Shu-Juan; Li, Shuo-Qi; Zou, Yu-Hong; Han, En-Hou; Guan, Shao-Kang; Liu, Qing-Yun
2019-12-01
Source PublicationMATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
ISSN0928-4931
Volume105
AbstractInfluences of proteins on degradation of magnesium alloys are of great significance but not well understood. In particular the roles of amino acids, the basic unit of proteins in regulating the progress of biodegradation of magnesium based materials remain unclear. This study aims to investigate the impacts of alanine, glutamic acid and lysine on degradation of pure magnesium in phosphate buffer solution through SEM, XPS, FTIR, potentio-dynamic polarisation curves, electrochemical impedance spectroscopy and immersion tests. The changed contents of amino acids in solutions were detected by UV-vis spectrophotometer. Results demonstrate that the charges of the selected amino acids imposed significant contribution to suppressing the degradation of pure magnesium in phosphate buffer solution. The presence of amino acids led to the formation of phosphate-based corrosion products, increasing free corrosion potential, and reduction in corrosion current density and solution pH depending on their isoelectric points and molecular structures. A plausible corrosion mechanism organised by amino acids on pure magnesium was proposed.
KeywordBiomaterials Potentiodynamic polarisation curves Amino acids Magnesium Degradation
Indexed BySCI
Language英语
WOS IDWOS:000490044700056
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80600
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang, Yu,Ding, Bao-Hua,Gao, Shi-Yu,et al. In vitro corrosion of pure Mg in phosphate buffer solution-Influences of isoelectric point and molecular structure of amino acids[J]. MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS,2019,105.
APA Wang, Yu.,Ding, Bao-Hua.,Gao, Shi-Yu.,Chen, Xiao-Bo.,Zeng, Rong-Chang.,...&Liu, Qing-Yun.(2019).In vitro corrosion of pure Mg in phosphate buffer solution-Influences of isoelectric point and molecular structure of amino acids.MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS,105.
MLA Wang, Yu,et al."In vitro corrosion of pure Mg in phosphate buffer solution-Influences of isoelectric point and molecular structure of amino acids".MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS 105(2019).
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