Synthesis and evaluation of MgF2 coatings by chemical conversion on magnesium alloys for producing biodegradable orthopedic implants of temporary use

The aim of the present work was the synthesis of biodegradable MgF2 coatings by chemical conversion on the commercial Elektron 21 and AZ91D magnesium alloys, in aqueous HF solutions for different concentrations and temperatures. The chemical composition and morphology of the coatings were analyzed b...

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Bibliographic Details
Main Authors: Casanova, P Y, Jaimes, K J, Parada, N J, Hernández-Barrios, C A, Aparicio, M, Viejo, F, Coy, A E
Format: Conference Proceeding
Language:English
Subjects:
Biodegradability
Chemical composition
Chemical synthesis
Corrosion resistance
Evaluation
Magnesium alloys
Magnesium base alloys
Magnesium fluorides
Morphology
Orthopaedic implants
Orthopedics
Physics
Protective coatings
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Summary:The aim of the present work was the synthesis of biodegradable MgF2 coatings by chemical conversion on the commercial Elektron 21 and AZ91D magnesium alloys, in aqueous HF solutions for different concentrations and temperatures. The chemical composition and morphology of the coatings were analyzed by scanning electron microscopy (SEM-EDX) and X-ray diffraction (XRD). On the other hand, their corrosion behavior was evaluated by gravimetric and electrochemical measurements in Hank's solution at 37°C for different immersion times. The experimental results revealed that chemical conversion in HF produced MgF2 coatings which corrosion resistance was enhanced by increasing the HF concentration. Further, the microstructure and composition of the base alloy played a key role on the growth and degradation mechanisms of the MgF2 coatings.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/466/1/012003