Alternating Current Electrophoretic Deposition of Chitosan–Gelatin–Bioactive Glass on Mg–Si–Sr Alloy for Corrosion Protection,ACS Applied Bio Materials

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Alternating Current Electrophoretic Deposition of Chitosan–Gelatin–Bioactive Glass on Mg–Si–Sr Alloy for Corrosion Protection
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-09-09 , DOI: 10.1021/acsabm.0c00900
Muhammad Akram _{1,

2} , Nasima Arshad ₁ , Merve Kübra Aktan ₂ , Annabel Braem ₂

Affiliation

Magnesium alloys have gained significant attention as degradable implant materials, but the fast and localized corrosion behavior leading to hydrogen gas evolution and alkaline poisoning limits their clinical application. In this research, the possibility of controlling the fast degradation rate of an experimental Mg–Si–Sr alloy by applying hybrid biopolymer chitosan (CS)–gelatin (G)–bioactive glass (BG) coatings was investigated. Electrophoretic deposition using alternating current fields (AC-EPD) was employed for surface coating and the influence of suspension parameters (biopolymer type and concentration, BG particle size), and key AC-EPD parameters (voltage amplitude, frequency, and time) on the coating quality were investigated. Stable suspensions of positively charged biopolymer/BG particles deposited on the Mg alloy coupled as a cathode during the high-amplitude peak. Furthermore, coating homogeneity improved with increasing peak-to-peak-voltage and the hybrid nature of the coatings was confirmed by scanning electron microscopy and Fourier transform infrared spectroscopy. Corrosion studies revealed a significantly decreased corrosion rate down to 0.08 mm/year for the Mg–Si–Sr alloy incorporating CS–G–BG b AC-EPD coating.

中文翻译：

壳聚糖-明胶-生物活性玻璃在 Mg-Si-Sr 合金上的交流电泳沉积用于腐蚀防护

镁合金作为可降解植入材料受到了极大的关注，但导致氢气释放和碱中毒的快速和局部腐蚀行为限制了它们的临床应用。在这项研究中，研究了通过应用混合生物聚合物壳聚糖 (CS)-明胶 (G)-生物活性玻璃 (BG) 涂层来控制实验性 Mg-Si-Sr 合金的快速降解速率的可能性。使用交流电场的电泳沉积 (AC-EPD) 用于表面涂层以及悬浮参数（生物聚合物类型和浓度、BG 粒径）和关键 AC-EPD 参数（电压幅度、频率和时间）对表面涂层的影响。涂层质量进行了调查。在高振幅峰期间，沉积在作为阴极耦合的镁合金上的带正电的生物聚合物/BG 颗粒的稳定悬浮液。此外，涂层均匀性随着峰峰值电压的增加而提高，并且通过扫描电子显微镜和傅里叶变换红外光谱证实了涂层的混合性质。腐蚀研究表明，加入 CS-G-BG b AC-EPD 涂层的 Mg-Si-Sr 合金的腐蚀速率显着降低至 0.08 mm/年。

更新日期：2020-10-21

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