Combined effects of rapid dissolution and micro-acidification accelerated Fe biodegradation for orthopedic applications

Biomedical Fe, as novel load-bearing implants for clinical applications, is restricted by too slow degradation. Herein, Fe-CaSO4 biocomposite is prepared at low temperature of 700 ℃. Subsequently, more corrosion active sites and micro-acidic environment produced by rapid dissolution of CaSO4 acceler...

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Bibliographic Details
Published in:Corrosion science 2023-05, Vol.216, p.111067, Article 111067
Main Authors: Li, Sheng, Ren, Jianzeng, Li, Xiaoqing, Wang, Xiangding, Cai, Anhui, Ding, Yuejiao, Yang, Youwen
Format: Article
Language:English
Subjects:
Corrosion active sites
Fe-CaSO4 biocomposite
Micro-acidic environment
Spark plasma sintering
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Summary:Biomedical Fe, as novel load-bearing implants for clinical applications, is restricted by too slow degradation. Herein, Fe-CaSO4 biocomposite is prepared at low temperature of 700 ℃. Subsequently, more corrosion active sites and micro-acidic environment produced by rapid dissolution of CaSO4 accelerate Fe biodegradation. Consequently, corrosion current density and corrosion rate of Fe-CaSO4 biocomposite greatly increases to 15.23 ± 3.41 μA·cm−2 and 0.19 ± 0.05 mm·y−1, respectively. Meanwhile, charge transfer resistance of Fe-CaSO4 biocomposite was significantly reduced to 86.09% than that of Fe. Additionally, Fe-CaSO4 biocomposite exhibits enough strength up to 343 MPa and good cytocompatibility, indicating a great potential for clinical applications. •Fe-CaSO4 biocomposite was successfully prepared at low temperature of 700 ℃ via rapid spark plasma sintering.•Rapid dissolution of CaSO4 produced more corrosion active sites on Fe matrix.•Micro-acidic environment via hydrolysis eroded Fe matrix.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2023.111067