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首页> 美国卫生研究院文献>Royal Society Open Science >Chromium oxide coatings with the potential for eliminating the risk of chromium ion release in orthopaedic implants
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Chromium oxide coatings with the potential for eliminating the risk of chromium ion release in orthopaedic implants

机译：具有消除骨科植入物中铬离子释放风险的潜力的氧化铬涂层

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Chromium oxide coatings prepared by radiofrequency reactive magnetron sputtering on stainless steel substrates were exposed to Ringer's physiological solution and tested for their electrochemical corrosion stability using an open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy and Mott–Schottky analysis. The coatings were found to be predominantly Cr2O3, based on the observation of the dominance of A1g and Eg symmetric modes in our Raman spectroscopic investigation and the Eu vibrational modes in our Fourier transform infrared spectroscopic measurements on the coatings. We investigated for the presence of chromium ions in Ringer's solution after all of the above electrochemical tests using atomic absorption spectroscopy, without finding a trace of chromium ions at the ppm level for coatings tested under open circuit and at the lower potentials implants are likely to experience in the human body. The coatings were further exposed to Ringer's solution for one month and tested for adhesion strength changes, and we found that they retained substantial adhesion to the substrates. We expect this finding to be significant for future orthopaedic implants where chromium ion release is still a major challenge.
机译：通过射频反应磁控溅射在不锈钢基板上制备的氧化铬涂层暴露于林格氏生理溶液中，并通过开路电势测量，电势极化，电化学阻抗谱和Mott–Schottky分析测试其电化学腐蚀稳定性。根据我们在拉曼光谱研究中观察到的A1g和Eg对称模式的优势以及我们对涂层进行的傅立叶变换红外光谱测量中的Eu振动模式，发现该涂层主要为Cr2O3。在使用原子吸收光谱法进行上述所有电化学测试之后，我们研究了林格氏溶液中铬离子的存在，但没有发现在开路测试且在较低电势下，植入物可能会经历的ppm级痕量铬离子。在人体中。将该涂料进一步暴露于林格氏液中一个月，并测试其粘合强度变化，我们发现它们与基材的粘合力基本保持不变。我们希望这一发现对将来的骨科植入物具有重要意义，因为铬离子的释放仍然是主要挑战。

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