对ASTM F2129和ASTM F746进行比较,用于评估裂腐蚀

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Updated: Jul 17, 2025

10:24

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

6.7K

Shiril Sivan¹, Elnaz Rahman¹, Jason D Weaver¹

¹Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S Food and Drug Administration, 10903 New Hampshire Ave., Silver Spring, MD 20993, USA.

Journal of testing and evaluation

|September 8, 2023

概括

ASTM F2129有效检测骨科植入物中的裂纹腐蚀,与ASTM F746不同,它可以产生假阳性. 这项研究强调F2129在评估模块化接口中材料对腐蚀的敏感性方面具有优越性.

科学领域:

生物材料科学生物材料科学
材料科学材料科学材料科学
电化学电化学电化学

背景情况:

裂隙腐蚀是骨科植入物失败的主要原因,特别是在模块化接口中.
了解不同材料组合对裂腐蚀的易受性对于植入物寿命至关重要.
目前用于评估腐蚀易受性的标准化方法可能存在局限性.

研究的目的:

为了比较ASTM F2129和修改后的ASTM F746在诱导和评估裂纹腐蚀方面的有效性.
为了评估常见的骨科植入物材料的裂纹腐蚀易感性: 316不钢,Ti等级2,Ti-6Al-4V和Co-Cr-Mo合金.
为了研究聚合物材料 (聚四乙烯) 对裂腐蚀的影响.

主要方法:

使用ASTM F2129 (循环潜在动力学极化) 和修改的ASTM F746 (孔/裂腐蚀试验).
采用杆子和洗衣机配置,用各种金属植入物材料创建人工裂.
包括仅使用金属棒和使用聚四乙烯清洗器的对照实验.

主要成果:

与ASTM F746.6相比,ASTM F2129显示出更明显的裂腐蚀.
根据ASTM F746,基于临界孔潜力,产生了裂腐蚀的虚假阳性结果,尽管有视觉证据相反.
在准确识别裂腐蚀方面,ASTM F2129证明更可靠.

结论:

根据ASTM F2129,在骨科植入物材料中评估裂腐蚀的方法比ASTM F746.6更有效.
这些发现为选择适当的电化学测试方法提供了宝贵的见解,以确保骨科设备的耐用性.
准确评估裂腐蚀易感性对于预防早期植入物失灵至关重要.

关键词:

裂隙腐蚀是一种裂隙腐蚀.测试设备测试设备的测试骨科骨科医生骨科医生

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