Localized currents and pH distribution studied during corrosion of MA8 Mg alloy in the cell culture medium

被引：50
作者：
Gnedenkov, A. S. [1 ]
Mei, D. [2 ]
Lamaka, S., V [2 ]
Sinebryukhov, S. L. [1 ]
Mashtalyar, D., V [1 ,3 ]
Vyaliy, I. E. [1 ]
Zheludkevich, M. L. [2 ,4 ]
Gnedenkov, S., V [1 ]
机构：
[1] Inst Chem FEB RAS, 159 Pr 100 Letiya Vladivostoka, Vladivostok 690022, Russia
[2] Helmholtz Zentrum Geesthacht HZG, Inst Mat Res, Magnesium Innovat Ctr MagIC, D-21502 Geesthacht, Germany
[3] Far Eastern Fed Univ, 8 Sukhanova St, Vladivostok 690950, Russia
[4] Univ Kiel, Fac Engn, Inst Mat Sci, Kiel, Germany
来源：
CORROSION SCIENCE | 2020年 / 170卷
基金：
俄罗斯科学基金会;
关键词：
Magnesium; Alloy; SEM; XRD; Passive films; SCANNING ELECTROCHEMICAL MICROSCOPY; BIODEGRADABLE MAGNESIUM SCAFFOLDS; PLASMA ELECTROLYTIC OXIDATION; SIMULATED BODY-FLUID; COMPOSITE COATINGS; PROTECTIVE-COATINGS; VIBRATING ELECTRODE; PART I; BONE; DEGRADATION;
D O I：
10.1016/j.corsci.2020.108689
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electrochemical behaviour of MA8 magnesium alloy in minimum essential medium (MEM) and 0.83 wt. % NaCl solution is compared using SVET, local pH measurements and hydrogen evolution tests. Corrosion products formed on the alloy surfaces are characterized using XRD and SEM-EDX analysis. Potential by-products of cells and bacteria activities increase the sample activity in MEM at the initial stage of material immersion. Hydrogen evolution rate is higher for samples in NaCl solution in comparison with MEM. Formation of partially protective magnesium-substituted hydroxyapatite stabilizes the local pH of MEM below 9.0 and does not allow to increase the pH during corrosion.
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页数：17
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