Study on the corrosion and wear characteristics of magnesium alloy AZ91D in simulated body fluids

Bioimplants made of metallic materials induce a stress-shielding effect and delayed osteoblast activity during in-vivo experiments. Bioimplants also suffer corrosion, wear and combined effect of corrosion–wear during their service time. Bioimplants made of magnesium alloys result in a negligible str...

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Bibliographic Details
Published inBulletin of materials science Vol. 43; no. 1; p. 8
Main Authors Vaira Vignesh, R, Padmanaban, R, Govindaraju, M
Format Journal Article
LanguageEnglish
Published Bangalore Indian Academy of Sciences 01.12.2020
Springer Nature B.V
Subjects
Adhesive wear
Biocompatibility
Biomedical materials
Body fluids
Cell adhesion & migration
Chemistry and Materials Science
Chloride
Corrosion effects
Corrosion rate
Corrosion tests
Corrosive wear
Emission analysis
Engineering
Field emission microscopy
Immersion tests (corrosion)
Magnesium alloys
Magnesium base alloys
Materials Science
Modulus of elasticity
Phase composition
Physiology
Potassium
Proteins
Stress shielding
Temperature
Wear rate
Wear tests
adhesive wear
corrosion
radial-basis function
simulated-body fluid
Magnesium alloy
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Summary:Bioimplants made of metallic materials induce a stress-shielding effect and delayed osteoblast activity during in-vivo experiments. Bioimplants also suffer corrosion, wear and combined effect of corrosion–wear during their service time. Bioimplants made of magnesium alloys result in a negligible stress shielding effect, owing to their similarity with bone’s elastic modulus. However, the soft matrix of the magnesium alloy is susceptible to high-wear rates. In this study, magnesium alloy AZ91D is subjected to the corrosion test (immersion and electrochemical), adhesive wear and simultaneous corrosion–wear test to test the significance of the body fluid in the corrosion–wear rate of the bioimplants. The surface morphology, elemental composition and phase composition of the specimens are characterized using field emission scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction analytic techniques. The results indicate that the simulated-body fluid has a significant effect on the corrosion rate and corrosion–wear rate of the specimens.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-019-1973-3