Insight into the passivity of selective laser-melted biomedical CoCrMo alloys via post-heat treatment

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

Corrosion Science Pub Date : 2025-06-11 DOI:10.1016/j.corsci.2025.113113

Yang Liu , Wei Wu , Yuqin Feng , Decheng Kong , Reynier I. Revilla , Junxi Zhang

引用次数: 0

Abstract

This study investigated the effect of heat treatment on the microstructural evolution and passive film properties of selective laser melted (SLMed) CoCrMo alloy in physiological saline. The results demonstrate that heat treatment at 1000°C improves the corrosion resistance of SLMed CoCrMo alloy, attributed to the formation of an electrochemically stable passive film with a uniform and low defect density structure. In contrast, after heat treatment at 750°C, the passive film on the SLMed CoCrMo alloy exhibits poor stability with a high defect density therein, therefore, an inferior corrosion resistance is deserved due to a rapid dissolution rate. Moreover, the relationship between microstructural evolution and corrosion resistance under different heat treatment conditions is discussed in detail.

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选择性激光熔化生物医用CoCrMo合金的后热处理钝化性能研究

研究了在生理盐水中热处理对选择性激光熔化（SLMed） CoCrMo合金显微组织演变和被动膜性能的影响。结果表明，在1000℃热处理后，形成了一层具有均匀、低缺陷密度结构的电化学稳定的钝化膜，提高了CoCrMo合金的耐蚀性。而在750℃热处理后，SLMed CoCrMo合金表面的钝化膜稳定性差，缺陷密度高，溶解速度快，耐腐蚀性较差。此外，还详细讨论了不同热处理条件下微观组织演变与耐蚀性的关系。

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.