非均匀锑铜层在氯化物介质中的腐蚀行为

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Engineering, Science and Technology Pub Date : 2023-08-17 DOI:10.1080/1478422X.2023.2247661

B. Tzaneva, V. Kostov

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引用次数: 0

摘要

电沉积的锑铜涂层表现出不同程度的化学和结构不均匀性，这决定了它们在0.5M氯化钠中的腐蚀行为。利用电化学阻抗谱和光学表面观察技术研究了各层在开路电位下的电化学和腐蚀性能。腐蚀极化试验表明，所有测试样品的锑铜合金的阳极行为是相似的，并取决于锑的耐化学性。在高达- 0.03 VAg/AgCl的阳极极化下，记录了多步骤的阳极氧化膜转变过程。扫描电镜观察发现，在较高的阳极极化下，形成了许多亚微米大小的凹坑。微电偶腐蚀电池的形成导致在OCP和阳极极化处锑相优先溶解。

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Corrosion behaviour of heterogeneous antimony-copper layers in chloride media

ABSTRACT The electrodeposited antimony-copper coatings demonstrate a varying degree of chemical and structural heterogeneity that determines their corrosion behaviour in 0.5M sodium chloride. The electrochemical and corrosion properties of layers at open circuit potential were investigated by electrochemical impedance spectroscopy and optical surface observation. Corrosion polarisation tests revealed that anodic behaviour of Sb–Cu alloys is similar for the all tested samples and depends on the antimony chemical resistance. Under anodic polarisation up to about −0.03 VAg/AgCl a multistep process of anodic oxide film transformation was registered. The observations by SEM revealed that at a higher anodic polarisation many submicron-sized pits are formed. The formation of microgalvanic corrosion cells results in preferential dissolution of the antimony phase at both OCP and anodic polarisation.

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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.