In vitro corrosion mechanism of biodegradable Mg-Zn-Gd alloy

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

Corrosion Science Pub Date : 2024-10-02 DOI:10.1016/j.corsci.2024.112495

Baoxue Zhou , Hua Huang , Hongwei Miao , Jun Wang , Zhongchang Wang , Deli Wang , Hui Zeng , Guangyin Yuan

引用次数: 0

Abstract

The corrosion mechanisms of a high-anticorrosive Mg-Zn-Gd alloy have been unveiled. Numerous particles were observed and identified as anodic W phase. Nevertheless, due to a small potential difference between the secondary phase and Mg matrix, and the nanoscale size and dispersed distribution of the particles, no serious pitting would occur. The segregation of Zn in the MgO layer was found to be favorable for the compactness of the whole corrosion layer. The preferential corrosion of W phase should be partly responsible for this segregation. A new method has been presented to develop Mg alloys with high corrosion resistance by alloying.

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可生物降解镁锌钆合金的体外腐蚀机理

揭示了高抗蚀性 Mg-Zn-Gd 合金的腐蚀机理。研究人员观察到了大量颗粒，并将其确定为阳极 W 相。尽管如此，由于次生相与镁基体之间的电位差很小，加上颗粒的纳米级尺寸和分散分布，不会出现严重的点蚀。研究发现，氧化镁层中的锌偏析有利于整个腐蚀层的致密性。W 相的优先腐蚀应该是造成这种偏析的部分原因。研究提出了一种通过合金化开发具有高耐腐蚀性的镁合金的新方法。

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.