Super-Hydrophobic Stearic Acid Layer Formed on Anodized High Purified Magnesium for Improving Corrosion Resistance of Biodegradable Implants

Magnesium and its alloys are ideal candidates for biodegradable implants. However, they can dissolve too rapidly in the human body for most applications. In this research, high purified magnesium (HP-Mg) was coated with stearic acid in order to slow the corrosion rate of magnesium in simulated body...

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Bibliographic Details
Published inarXiv.org
Main Authors Khalifeh, Sohrab, Burleigh, T David
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 28.06.2017
Subjects
Biocompatibility
Biodegradability
Biomedical materials
Body fluids
Corrosion
Corrosion rate
Corrosion resistance
Electrochemical impedance spectroscopy
Hydrophobicity
In vitro methods and tests
Magnesium
Protective coatings
Stearic acid
Surgical implants
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Summary:Magnesium and its alloys are ideal candidates for biodegradable implants. However, they can dissolve too rapidly in the human body for most applications. In this research, high purified magnesium (HP-Mg) was coated with stearic acid in order to slow the corrosion rate of magnesium in simulated body fluid at 37{\deg}C. HP-Mg was anodized to form an oxide/hydroxide layer, then it was immersed in a stearic acid solution. Electrochemical impedance spectroscopy and potentiodynamic polarization were used to estimate the corrosion rate of HP-Mg specimens. The results confirm that the hydrophobic coating can temporarily decrease the corrosion rate of HP-Mg by 1000x.
ISSN:2331-8422