Effects of compressive stress on the corrosion behavior of biodegradable zinc with tension-compression asymmetry under simulated physiological environment

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-11-14 DOI:10.1016/j.corsci.2024.112566

Lu Zhang , Xin Zhang , Jianwei Dai , Juyi Yang , Zijian Huang , Zhihai Huang , Chao Guo , Jing Bai , Feng Xue , Linyuan Han , Chenglin Chu

引用次数: 0

Abstract

Biodegradable Zn vascular stents are compressed by the vessel wall while maintaining blood flow, which may lead to unpredictable deterioration of the stent due to stress corrosion. This work investigated the mechanical and corrosion behavior of Zn in a coupled environment of compressive stress and artificial plasma. The corrosion rate of Zn increases as compressive stress rises. However, the acceleration effect gradually decreased in contrast to our previous work on tensile stresses, which can be attributed to the tension-compression asymmetry of Zn-metal. Meanwhile, the corrosion mechanism of Zn was compared, and numerical models for stresses and corrosion rates were established.

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压缩应力对模拟生理环境下拉伸-压缩不对称生物降解锌腐蚀行为的影响

可生物降解锌血管支架在维持血流的同时会受到血管壁的挤压，这可能会导致支架因应力腐蚀而发生不可预知的老化。这项研究调查了 Zn 在压应力和人工等离子体耦合环境下的机械和腐蚀行为。随着压应力的增加，Zn 的腐蚀速率也随之增加。然而，与我们之前在拉伸应力下的研究相比，加速效应逐渐减弱，这可能是由于 Zn 金属的拉伸-压缩不对称造成的。同时，比较了锌的腐蚀机理，并建立了应力和腐蚀速率的数值模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.