Department of Materials Science & Engineering, Institute of Space Technology Islamabad, Islamabad Highway, Islamabad, 44000, Pakistan.
Department of Materials Science & Engineering, Institute of Space Technology Islamabad, Islamabad Highway, Islamabad, 44000, Pakistan.
J Mech Behav Biomed Mater. 2023 Dec;148:106188. doi: 10.1016/j.jmbbm.2023.106188. Epub 2023 Oct 13.
Electrophoretic deposition (EPD) of polyether ether ketone (PEEK) coatings on metallic implants has recently attracted a great deal of interest; however, further investigation into their corrosion, surface, and tribological properties is required for their clinical application. Using Potentiodynamic polarization and Mott-Schottky analysis of PEEK coatings, we analyzed the electrochemical corrosion behavior of electrophoretically deposited PEEK coatings on 316L stainless steel (SS) substrates. In addition, the tribological behavior of the coatings was determined through pin-on-disc and scratch testing. Initially, the EPD parameters were optimized using a Taguchi Design of Experiment (DoE) approach. The coatings exhibited irregular shaped grains along with ∼66 μm of thickness. Fourier transform infrared spectroscopy confirmed the presence of functional groups ascribed with PEEK. The coatings were moderately hydrophobic and had an average roughness of ∼2 μm. The corrosion studies demonstrated promising features of current density and corrosion potential, indicating that corrosion resistance significantly improves with PEEK coating. Electrochemical impedance spectroscopy also confirmed the corrosion resistance of PEEK coating. The coatings exhibited a slightly lower wear resistance than SS samples, but still possessed adequate wear and scratch resistance for biomedical applications. The current study confirmed that the PEEK coatings on metallic implants is effective for orthopedic applications where corrosion and tribology are major concerns.
电泳沉积（EPD）聚醚醚酮（PEEK）涂层在金属植入物上的应用最近引起了广泛关注；然而，为了将其临床应用，还需要进一步研究其腐蚀、表面和摩擦学性能。本研究采用动电位极化和 Mott-Schottky 分析对 316L 不锈钢（SS）基底上电泳沉积的 PEEK 涂层的电化学腐蚀行为进行了分析。此外，还通过销盘和划痕试验对涂层的摩擦学性能进行了研究。首先，采用田口设计（DoE）方法优化了 EPD 参数。涂层呈现出不规则形状的晶粒，厚度约为 66μm。傅里叶变换红外光谱（FTIR）证实了与 PEEK 相关的官能团的存在。涂层具有中等疏水性，平均粗糙度约为 2μm。腐蚀研究表明，电流密度和腐蚀电位具有良好的特性，表明 PEEK 涂层显著提高了耐腐蚀性。电化学阻抗谱（EIS）也证实了 PEEK 涂层的耐腐蚀性。涂层的耐磨性略低于 SS 样品，但仍具有足够的耐磨和耐划伤性能，适用于生物医学应用。本研究证实，金属植入物上的 PEEK 涂层对于腐蚀和摩擦学问题是一种有效的解决方案，适用于矫形应用。
