钴-氧化石墨烯复合涂层中的晶界和应变工程增强了抗电化学降解和氢渗透能力

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2024-09-13 DOI:10.1016/j.matchar.2024.114377

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引用次数: 0

摘要

在低碳钢上电沉积了钴（Co）和钴-氧化石墨烯（Co-GO）涂层。在 3.5 wt% 的氯化钠溶液中，与原始钴涂层（21.4 μA/cm2）相比，具有最佳 GO 体积分数的 Co-GO 涂层（Co-GO-3）的腐蚀电流密度（5.3 μA/cm2）明显降低。稳定的 CoO 被动氧化层的形成和更高比例的低能晶界（低角度晶界和 CSL 界）有助于增强抗腐蚀性能。Co-GO-3 涂层还显示出最低的氢渗透电流，这归因于其相对封闭的晶界比例较高以及涂层内存在压缩应变。

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Enhanced resistance to electrochemical degradation and hydrogen permeation by grain boundary and strain engineering in cobalt-graphene oxide composite coatings

Cobalt (Co) and cobalt-graphene oxide (Co-GO) coatings were electrodeposited on mild steel. The Co-GO coating with an optimum volume fraction of GO (Co-GO-3) displayed significantly reduced corrosion current density (5.3 μA/cm²) compared to pristine cobalt coating (21.4 μA/cm²) in 3.5 wt% NaCl solution. Formation of a stable CoO passive oxide layer and a higher proportion of low energy grain boundaries (low-angle grain boundaries and CSL boundaries) contributed to the enhanced anti-corrosion properties. The Co-GO-3 coating also exhibited the lowest hydrogen permeation current, attributed to its higher fraction of relatively closed grain boundaries and presence of compressive strain within the coating.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.