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1. 发明授权

US6132593A Method and apparatus for measuring localized corrosion and other heterogeneous electrochemical processes 失效
标题翻译：用于测量局部腐蚀和其他非均质电化学过程的方法和设备
公开(公告)号：US6132593A
公开(公告)日：2000-10-17
申请号：US093576
申请日：1998-06-08
申请人： Yong-Jun Tan
发明人： Yong-Jun Tan
IPC分类号： G01N17/02 , G01N17/04
CPC分类号： G01N17/04 , G01N17/02
摘要： An electrochemical method for measuring localized corrosion and other heterogeneous electrochemical processes is described. A multi-sensor electrode namely the wire beam electrode, integrated by coupling all its wire terminals together, is used to simulate a conventional one-piece metal electrode surface in electrochemical behavior. The working surface of the wire beam electrode is exposed to an electrolyte as a conventional one-piece electrode to allow heterogeneous electrochemical processes such as localized corrosion to occur. Electrochemical parameters at local areas of the wire beam electrode surface are detected by means of wires located at those areas. A zero resistance ammeter is inserted between each selected wire terminal and all other coupled wire terminals to measure the coupling current flowing into or out the selected wire, and thus a coupling current distribution map is produced. A high impedance voltmeter is used to measure the electrochemical potential of each temporarily uncoupled wire versus a reference electrode, and thus an electrochemical potential distribution map is produced. A polarization resistance measuring apparatus is used to measure the polarization resistance of each temporarily uncoupled wire, and thus a polarization resistance distribution map is produced. These electrochemical parameters and maps are used to determine the kinetics of heterogeneous electrochemical processes using equations described in this disclosure. This method and apparatus can be used to measure various forms of heterogeneous electrochemical processes such as localized corrosion, cathodic and anodic protection, electroplating, electro-machining, electrotyping and electrowinning.
摘要翻译：描述了用于测量局部腐蚀和其他非均相电化学过程的电化学方法。多传感器电极，即通过将其所有导线端子连接在一起而集成的线束电极，用于模拟电化学行为中常规的一体式金属电极表面。线束电极的工作表面作为常规的单件电极暴露于电解质，以允许发生诸如局部腐蚀的异质电化学过程。通过位于这些区域的电线来检测线束电极表面的局部区域的电化学参数。在每个选定的导线端子和所有其他耦合的线端子之间插入零电阻电流表，以测量流入或流出所选导线的耦合电流，从而产生耦合电流分布图。使用高阻抗电压表来测量每个临时分离的线相对于参比电极的电化学电位，因此产生电化学电位分布图。使用极化电阻测量装置测量每个临时非耦合线的极化电阻，从而产生极化电阻分布图。这些电化学参数和图用于使用本公开中描述的方程来确定异质电化学过程的动力学。该方法和装置可用于测量各种形式的异质电化学过程，例如局部腐蚀，阴极和阳极保护，电镀，电加工，电镀和电解冶金。

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