了解波特兰水泥浆中镁合金表面被动膜的形成和脆弱性

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2024-09-04 DOI:10.1016/j.vacuum.2024.113618

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引用次数: 0

摘要

通过电化学方法和表面特性分析，研究了硅酸盐水泥浆中嵌入的 AZ41 Mg 合金上钝化膜的形成和破坏情况。结果表明，在镁合金表面可以形成一层薄而致密的钝化膜，而在铝锰相上可以观察到明显的钝化膜三明治结构。然而，Cl- 离子会破坏钝化膜，导致即使在碱性环境中也会形成腐蚀产物层。此外，硅酸盐水泥浆中嵌入的 AZ41 Mg 合金的耐腐蚀性能随着时间的推移而提高，而氯离子的引入会导致耐腐蚀性能下降。

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Understanding the formation and vulnerability of passive films on magnesium alloy surface in Portland cement paste

The formation and destruction of the passivation film on AZ41 Mg alloy embedded in Portland cement paste were investigated via electrochemical methods and surface characterizations. Results indicate a thin but dense passivation film can be formed on the Mg alloy surface, while a distinctive sandwich-like structure of passivation film is observed on the Al-Mn phase. However, Cl⁻ ions could lead to the destruction of the passivation film, resulting in the formation of a corrosion product layer even in the alkaline environment. Moreover, corrosion resistance of AZ41 Mg alloy embedded in Portland cement paste improves over time, while the introduction of chloride ions triggers a decline in corrosion resistance.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.