揭示NiSe金属间化合物在水基溶液中的腐蚀机制
Jui-Teng Liang1, Hwai-En Lin1,2,3
1Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
ACS applied materials & interfaces
|November 29, 2024
概括
电子沉积温度控制器Ni-Se涂层晶体阶段. 由于阻碍了Se溶解,NiSe2涂层在水性电解质中的耐腐蚀性比Ni0.85Se涂层更好.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 腐蚀科学 腐蚀科学
背景情况:
- - (Ni-Se) 金属间化合物正在被用于各种应用.
- 了解它们在水性环境中的腐蚀行为对于材料耐用性至关重要.
- 电沉积为制造具有可调节性质的Ni-Se涂层提供了一种多功能方法.
研究的目的:
- 研究电沉积温度对Ni-Se涂层相位形成的影响.
- 分析基于水的电解质中不同Ni-Se相的腐蚀行为.
- 阐明了电场下的Ni-Se涂层腐蚀的机制.
主要方法:
- 通过在40-70°C的温度下通过电沉积制造Ni-Se涂层.
- 使用结晶学技术对涂层进行相位分析.
- 在纯水和在电场下测量腐蚀速率.
- 电化学分析用于研究反应机制.
主要成果:
- 电沉积温度的提高促进了 (Se) 沉积,将晶体相从Ni0.85Se转变为NiSe2.
- 与NiSe2涂层相比,Ni0.85Se涂层在水中具有更高的自然溶解率.
- 在电场下,Ni0.85Se涂层表现出更严重的腐蚀,而NiSe2涂层表现出由于延迟SeO2溶解而增强的耐腐蚀性.
结论:
- 电子沉积温度是控制Ni-Se涂层的相位组成和随后的耐腐蚀性的一个关键参数.
- 与Ni0.85Se相相比,NiSe2相在水性电解质中提供了优越的耐腐蚀性.
- 这些发现为Ni-Se合金的电化学腐蚀机制提供了洞察力,并指导开发更耐用的涂料.
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