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首页> 外文期刊>Corrosion science >Electrochemical polishing as a 316L stainless steel surface treatment method: Towards the improvement of biocompatibility
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Electrochemical polishing as a 316L stainless steel surface treatment method: Towards the improvement of biocompatibility

机译：电化学抛光作为316L不锈钢表面处理方法：改善生物相容性

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摘要

A 316L stainless steel (316L-SS) surface was electrochemically polished (EP) in an electrolyte of a new chemical composition at different cell voltages, with the aim of improving its corrosion resistance and biocompatibility. X-ray photoelectron spectroscopy results revealed that the EP-formed oxide films were characterized by a significantly higher atomic Cr/Fe ratio and film thickness, in comparison to the naturally-grown passive oxide film formed on the untreated (control) 316L-SS surface. As a result of the increase in the oxide film thickness and relative Cr enrichment, the EP-treated 316L-SS surfaces offered a notable improvement in general corrosion resistance and pitting potential. In addition, the attachment of endothelial cells (ECs) and smooth muscle cells (SMCs) to the 316L-SS surfaces revealed a positive effect of electropolishing on the preferential attachment of ECs, thus indicating that the EP surfaces could be endo-thelialized faster than the control (unmodified) 316L-SS surface. Furthermore, the EP surfaces showed a much lower degree of thrombogenicity in experiments with the platelet-rich plasma. Therefore, the use of the electrochemical polishing technique in treating a 316L-SS surface, under the conditions presented in this paper, indicates a significant improvement in the surface's performance as an implant material.
机译：316L不锈钢（316L-SS）表面在新化学成分的电解液中以不同的电池电压进行电化学抛光（EP），目的是提高其耐腐蚀性和生物相容性。 X射线光电子能谱结果表明，与在未经处理（对照）的316L-SS表面上形成的自然生长的被动氧化膜相比，EP形成的氧化膜的特征在于原子Cr / Fe比和膜厚明显更高。由于氧化物膜厚度的增加和相对Cr含量的增加，经过EP处理的316L-SS表面在总体耐蚀性和点蚀电位方面提供了显着改善。此外，内皮细胞（ECs）和平滑肌细胞（SMCs）与316L-SS表面的附着揭示了电抛光对ECs优先附着的积极影响，因此表明EP表面的内皮化速度要快于对照（未修改）316L-SS表面。此外，在富含血小板血浆的实验中，EP表面显示出较低的血栓形成性。因此，在本文提出的条件下，使用电化学抛光技术处理316L-SS表面可显着改善表面作为植入材料的性能。

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  • 来源
    《Corrosion science》 |2014年第10期|89-100|共12页
  • 作者

    Sajjad Habibzadeh; Ling Li; Dominique Shum-Tim; Elaine C. Davis; Sasha Omanovic;

  • 作者单位

    Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC H3A 0C5, Canada;

    Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada;

    Divisions of Cardiac Surgery and Surgical Research, Department of Surgery, McGill University, Montreal, QC, Canada;

    Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada;

    Department of Chemical Engineering, McGill University, Montreal QC, Canada;

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  • 正文语种 eng
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  • 关键词

    A. Stainless steel; B. EIS; B. XPS; C. Passive films; C. Pitting corrosion;

    机译：A.不锈钢;B.EIS;B. XPS;C.被动片;C.点蚀;

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