Scholarlink

<p>Optimizing electrochemical polishing (ECP) of CoCr L605 alloy tubes, specifically for stent applications, has significant potential to enhance the performance of medical devices. The present study presents a systematic approach to refine ECP parameters, focusing on achieving controlled material removal and optimal surface smoothness. CoCr L605 tubes, incorporating laser-cut struts of varying thicknesses, underwent ECP using a custom-built setup comprising of DC source, cylindrical cathode plate, magnetic stirrer, sample holder and a specially formulated electrolyte comprising of the H₂SO₄, HCl and Ethylene glycol in the ratio of 2:1:17. Key polishing parameters i.e., voltage, temperature, and dip time were systematically varied using a Taguchi L9 orthogonal array design to investigate their influence on the ECP of CoCr struts. Post-polishing evaluations included microscopic imaging and atomic force microscopy (AFM) to assess strut width reduction, polishing uniformity, and surface roughness. Results indicated that strut width reduction, representing material removal, increased with higher dip time, temperature, and voltage. Dip time emerged as the most significant factor influencing the removal rate, while temperature showed a comparatively moderate influence. Microscopic analysis consistently revealed uniform polishing across the struts with negligible defects. Furthermore, AFM results demonstrated that surface roughness was below ~ 63&#xa0;nm across all tested conditions and comparable to that of the commercial stents, confirming a high-quality finish suitable for biomedical applications. This optimization study provides essential insights into the precise control of ECP parameters for CoCr L605 material used in stent applications, enabling superior surface characteristics and dimensional accuracy, which are vital for future advances in stent fabrication.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A study on refining electrochemical polishing of laser-cut CoCr L605 struts for nano-scale surface finish and dimensional precision

  • 期刊论文

  • 发表日期：

    2026年3月29日

查看全文
  • Khanish Gupta,
  • Mohit Agarwal,
  • Kusum Meena,
  • Naresh Bhatnagar

摘要

Optimizing electrochemical polishing (ECP) of CoCr L605 alloy tubes, specifically for stent applications, has significant potential to enhance the performance of medical devices. The present study presents a systematic approach to refine ECP parameters, focusing on achieving controlled material removal and optimal surface smoothness. CoCr L605 tubes, incorporating laser-cut struts of varying thicknesses, underwent ECP using a custom-built setup comprising of DC source, cylindrical cathode plate, magnetic stirrer, sample holder and a specially formulated electrolyte comprising of the H₂SO₄, HCl and Ethylene glycol in the ratio of 2:1:17. Key polishing parameters i.e., voltage, temperature, and dip time were systematically varied using a Taguchi L9 orthogonal array design to investigate their influence on the ECP of CoCr struts. Post-polishing evaluations included microscopic imaging and atomic force microscopy (AFM) to assess strut width reduction, polishing uniformity, and surface roughness. Results indicated that strut width reduction, representing material removal, increased with higher dip time, temperature, and voltage. Dip time emerged as the most significant factor influencing the removal rate, while temperature showed a comparatively moderate influence. Microscopic analysis consistently revealed uniform polishing across the struts with negligible defects. Furthermore, AFM results demonstrated that surface roughness was below ~ 63 nm across all tested conditions and comparable to that of the commercial stents, confirming a high-quality finish suitable for biomedical applications. This optimization study provides essential insights into the precise control of ECP parameters for CoCr L605 material used in stent applications, enabling superior surface characteristics and dimensional accuracy, which are vital for future advances in stent fabrication.