AA5083-H111在模拟海水中局部腐蚀的TEM高分辨率表征

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-12-31 DOI:10.1080/1478422X.2022.2162662

Yu Ji, Yingchang Mao, Lihua Dang, Da-Hai Xia, Wenbin Hu

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引用次数: 3

摘要

摘要结合扫描电子显微镜（SEM）、聚焦离子束（FIB）和透射电子显微镜（TEM）技术，研究了铝合金（AA）5083-H111在3.5wt-%NaCl溶液中的局部腐蚀。研究发现，富Ti金属间颗粒（IMPs）作为阴极并引发其相邻Al基体的溶解；结果在IMP与其周围的Al基体之间形成了沟槽。IMP外围的合金表面上发现了凸起的“圆圈”，这被认为是腐蚀产物沉积的阴极区域。在凸起的“圆圈”区域下观察到由细小的Al晶粒和腐蚀的Al–Mg相组成的亚表面。

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A high-resolution characterisation of localised corrosion of AA5083-H111 in simulated seawater by TEM

ABSTRACT The localised corrosion of aluminium alloy (AA) 5083-H111 in 3.5 wt-% NaCl solution was studied by combing scanning electron microscope (SEM), focused ion beam (FIB) and transmission electron microscopy (TEM) techniques. It was found that the Ti-rich intermetallic particles (IMPs) served as the cathodes and triggered the dissolution of its adjacent Al matrix; as a result, a trench was formed between the IMP and its surrounding Al matrix. Raised ‘circles’ were identified on the alloy surface at the periphery of the IMPs, which was considered to be the cathodic region on which corrosion products deposited. A sub-surface that consisted of fine Al grains and corroded Al–Mg phases were observed under the raised ‘circle’ region.

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.