Attain insensitivity to chlorine ions in magnesium alloys by impeding the diffusion process

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2024-01-13 DOI:10.1038/s41529-023-00423-9

Yuyang Chen, Guodong Fan, Xinchen Xu, Yiwen Chen, Tao Ying, Yangxin Li, Hong Zhu, Wanting Sun, Yang Gao, Zongyang Yang, Weiwei Song, Xiaoqin Zeng

引用次数: 0

Abstract

To serve in a more aggressive chlorine (Cl−) ions-containing environment, a chlorine ions insensitivity Mg-Nd-Zr alloys is fabricated, exhibiting a stable corrosion resistance in either 3.5wt.% or 10 wt.% NaCl solution. Unlike pure Mg who exhibit a negligible protection of the matrix, a distinct “hindering effect” of Cl− diffusion caused by doping elements within the corrosion film was observed. Its underlying mechanism is demonstrated by X-ray photoelectron spectroscopy (XPS) and Density functional theory (DFT) analysis. The introducing with Nd and Zr elements can effectively passivate vacancies and alter diffusion energy of chlorine ions.

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通过阻碍扩散过程实现对镁合金中氯离子的不敏感性

为了在含氯（Cl-）离子的侵蚀性更强的环境中使用，我们制造了一种对氯离子不敏感的镁-钕-锆合金，它在 3.5 重量百分比或 10 重量百分比的氯化钠溶液中均表现出稳定的耐腐蚀性。与纯镁对基体的保护作用微乎其微不同，在腐蚀膜中观察到掺杂元素对 Cl- 扩散的明显 "阻碍作用"。X 射线光电子能谱（XPS）和密度泛函理论（DFT）分析证明了其基本机制。引入钕和锆元素可有效钝化空位并改变氯离子的扩散能。

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

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies