Formulation of Magnesium Conversion Coating with Herbal Extracts for Biomedical Applications

Magnesium and its alloys are one of the most reliable biodegradable implant materials with good mechanical properties. The rapid corrosion behaviour of Mg in the physiological fluid prevents its usage. The corrosion resistance and biocompatibility of the AZ31 Magnesium alloy are enriched with conver...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2022-12, Vol.8 (4), Article 114
Main Authors: Kannan, Saranya, Madhu, Kalaiyarasan, Nallaiyan, Rajendran
Format: Article
Language:English
Subjects:
Apatite
Biocompatibility
Biodegradability
Biomaterials
Biomedical materials
Chelation
Chemistry and Materials Science
Coatings
Conversion coatings
Corrosion
Corrosion and Coatings
Corrosion rate
Corrosion resistance
Infrared spectra
Magnesium
Magnesium base alloys
Materials Science
Mechanical properties
Plant extracts
Sodium hydroxide
Solid Mechanics
Surgical implants
Terminalia chebula
Tribology
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Summary:Magnesium and its alloys are one of the most reliable biodegradable implant materials with good mechanical properties. The rapid corrosion behaviour of Mg in the physiological fluid prevents its usage. The corrosion resistance and biocompatibility of the AZ31 Magnesium alloy are enriched with conversion coatings formulated with the extract of Terminalia chebula . The surface of AZ31 Mg alloy was treated with sodium hydroxide followed by the treatment with ethanolic extract of T. chebula . The coating showed thallus-like morphology. The interaction of Mg with the tannins and phytates present in the extract was confirmed with Attenuated Total Reflectance Infrared spectra. In the coating, the corrosion rate was effectively declined due to the passive layer formed as a result of the chelation of Mg 2+ ions by the phytate and tannate. The coating exhibited apatite forming ability.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-022-00715-8