Mechanisms of laminar flow controlled in vitro corrosion of a biodegradable Fe-Mn-C steel

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-06-01 Epub Date: 2025-03-12 DOI:10.1016/j.corsci.2025.112860
Martin Otto , Thomas Hultsch , Viktoriia Shtefan , Volker Hoffmann , Sviatlana V. Lamaka , Thomas Gemming , Annett Gebert , Jochen Fröhlich , Mikhail L. Zheludkevich , Julia Hufenbach
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Abstract

The in vitro corrosion of Fe-30Mn-1C in a Ca-modified Hanks’ balanced salt solution was investigated for biodegradable cardiovascular stents with a rotating disc electrode. A blood flow-related approach was developed to adjust laminar flow conditions. Electrochemical monitoring revealed that intermediate flow caused maximum corrosion, while static and high flow conditions led to minimal corrosion. Surface analysis indicated the formation of a non-crystalline, nanoscopic degradation layer, whereby thickness, porosity and layer-disrupting defects are strongly affected by flow conditions. The interplay between laminar flow and the degradation layer was crucial for the steel degradation and discussed by employing a hydrodynamics-based corrosion scheme.
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可生物降解Fe-Mn-C钢层流控制体外腐蚀机理研究
研究了Fe-30Mn-1C在ca修饰的Hanks平衡盐溶液中的体外腐蚀,并将其用于旋转圆盘电极的可生物降解心血管支架。一种血流相关的方法被开发来调整层流条件。电化学监测表明,中间流动条件下腐蚀最大,静态和大流量条件下腐蚀最小。表面分析表明形成了一个非晶的纳米级降解层,其中厚度、孔隙率和层破坏缺陷受到流动条件的强烈影响。层流与降解层之间的相互作用对钢的降解至关重要,并采用基于水动力学的腐蚀方案进行了讨论。
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来源期刊
Corrosion Science
Corrosion Science 工程技术-材料科学:综合
CiteScore
13.60
自引率
18.10%
发文量
763
审稿时长
46 days
期刊介绍: Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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