Development of a New Microelectrochemical Measurement System for In-situ Optical Microscopic Observation of Pit Initiation Processes
Development of a New Microelectrochemical Measurement System for In-situ Optical Microscopic Observation of Pit Initiation Processes
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开发用于凹坑引发过程原位光学显微观察的新型微电化学测量系统
DOI：
10.1149/1.3697593
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and Nobuyoshi Hara
中科院分区：
文献类型：
--
作者：
Aya Chiba;Izumi Muto;Yu Sugawara;and Nobuyoshi Hara
在过去的十年里，基于玻璃毛细管微电极技术的微电化学测量系统极大地推进了我们对点蚀的理解。然而，通过使用该系统，不可能对溶解表面进行原位和实时观察。在这里，我们开发了一个测量系统，用于现场和实时观测（横向分辨率：约。350 nm，时间分辨率：30图像/s），采用光学显微镜和微电化学池相结合的方法，研究了不锈钢点蚀的起始过程。观察硫化锰（MnS）夹杂物处的点蚀萌生的结果清楚地表明，亚稳点蚀和稳定点蚀的萌生过程存在显著差异。该实验技术适用于广泛的电极表面局部电化学分析。
The previous microelectrochemical measurement system based on the micro-electrode technique with a glass capillary dramatically advanced our understanding of pitting corrosion over the past ten years. However, by using this system, it was impossible to take insitu and real-time observations of dissolving surfaces. Here we developed a measurement system for in-situ and real-time observations (lateral resolution: ca. 350 nm, time resolution: 30 images/s) of the initiation processes of pitting corrosion on stainless steel by combining an optical microscope with a microelectrochemical cell. The results of the observations on pit initiation at the manganese sulfide (MnS) inclusions clearly indicated marked differences in the initiation processes of metastable and stable pits. The experimental technique developed here is applicable to a wide range of the local electrochemical analysis of electrode surfaces.