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镁钙锌合金上磷酸锰钙涂层的体外降解行为

In Vitro Degradation Behaviors of Manganese-Calcium Phosphate Coatings on an Mg-Ca-Zn Alloy.

作者信息

Su Yichang, Su Yingchao, Zai Wei, Li Guangyu, Wen Cuie

机构信息

Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China.

School of Engineering, RMIT University, Melbourne, VIC 3001, Australia.

出版信息

Scanning. 2018 Feb 13;2018:6268579. doi: 10.1155/2018/6268579. eCollection 2018.

DOI:10.1155/2018/6268579
PMID:29643970
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5831605/
Abstract

In order to decrease the degradation rate of magnesium (Mg) alloys for the potential orthopedic applications, manganese-calcium phosphate coatings were prepared on an Mg-Ca-Zn alloy in calcium phosphating solutions with different addition of Mn. Influence of Mn content on degradation behaviors of phosphate coatings in the simulated body fluid was investigated to obtain the optimum coating. With the increasing Mn addition, the corrosion resistance of the manganese-calcium phosphate coatings was gradually improved. The optimum coating prepared in solution containing 0.05 mol/L Mn had a uniform and compact microstructure and was composed of MnHPO·3HO, CaHPO·2HO, and Ca(PO). The electrochemical corrosion test in simulated body fluid revealed that polarization resistance of the optimum coating is 36273 Ωcm, which is about 11 times higher than that of phosphate coating without Mn addition. The optimum coating also showed the most stable surface structure and lowest hydrogen release in the immersion test in simulated body fluid.

摘要

为了降低镁（Mg）合金在潜在骨科应用中的降解速率，在不同Mn添加量的磷酸钙溶液中，于Mg-Ca-Zn合金上制备了锰-磷酸钙涂层。研究了Mn含量对模拟体液中磷酸盐涂层降解行为的影响，以获得最佳涂层。随着Mn添加量的增加，锰-磷酸钙涂层的耐蚀性逐渐提高。在含有0.05 mol/L Mn的溶液中制备的最佳涂层具有均匀致密的微观结构，由MnHPO·3H₂O、CaHPO·2H₂O和Ca₃(PO₄)₂组成。模拟体液中的电化学腐蚀试验表明，最佳涂层的极化电阻为36273 Ω·cm²，约为未添加Mn的磷酸盐涂层的11倍。在模拟体液浸泡试验中，最佳涂层还表现出最稳定的表面结构和最低的氢释放量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/fa13cf486462/SCANNING2018-6268579.008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/080aa57f1f46/SCANNING2018-6268579.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/fa13cf486462/SCANNING2018-6268579.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/d631d51b91df/SCANNING2018-6268579.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/c1b25fdf7084/SCANNING2018-6268579.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/aacddb6ee900/SCANNING2018-6268579.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/b347ca6e08e3/SCANNING2018-6268579.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/01280d55b003/SCANNING2018-6268579.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/4ac27ba8e4cf/SCANNING2018-6268579.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/080aa57f1f46/SCANNING2018-6268579.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cac0/5831605/fa13cf486462/SCANNING2018-6268579.008.jpg

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