Quantifying of the effects of secondary phases on corrosion in Mg-RE alloys by X-CT

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2024-01-04 DOI:10.5006/4446

Chengming Yan, Guangyuan Tian, C. Xue, Zhihao Yang, Chi Zhang, Shuo Wang, Hui Su, Zhifei Yan, Yingchun Tian, Junsheng Wang

引用次数: 0

Abstract

The secondary phases of Mg alloys are closely related to corrosion. In this work, the correlation between secondary phases and corrosion in a Mg-6Gd-Y-Al alloy was identified by X-ray computed tomography technology. The influence of aging treatment on secondary phases of Mg alloys during corrosion was studied. The corrosion morphology of Mg alloy was examined in situ using 3D reconstruction techniques. To quantify the effects of secondary phases on the corrosion of Mg alloys, the variation of average number density, average equivalent diameter and average distance were investigated. The corrosion rate of Mg alloys was measured by electrochemical tests. It was found that after low temperature aging at 95 °C, the corrosion rate of Mg alloys decreased by ~50%. This is due to the uniform distribution of secondary phases which increases the local overall potential and improves the protection of surface films.

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利用 X-CT 量化次生相对 Mg-RE 合金腐蚀的影响

镁合金的次生相与腐蚀密切相关。在这项工作中，利用 X 射线计算机断层扫描技术确定了 Mg-6Gd-Y-Al 合金中二次相与腐蚀之间的相关性。研究了腐蚀过程中时效处理对镁合金次生相的影响。使用三维重建技术对镁合金的腐蚀形态进行了现场检测。为了量化次生相对镁合金腐蚀的影响，研究了平均数量密度、平均当量直径和平均距离的变化。通过电化学测试测量了镁合金的腐蚀速率。结果发现，在 95 °C 低温老化后，镁合金的腐蚀速率降低了约 50%。这是由于次生相的均匀分布增加了局部整体电位，提高了表面膜的保护能力。

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 MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.