Measurement of Passive Film Effects on Scratched Electrode Behavior
| Autor: | P. D. Bastek, Robert G. Kelly, Roger C. Newman |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Drop (liquid) Metallurgy food and beverages Peak current Conductivity Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electrode Materials Chemistry Electrochemistry Composite material Ohmic contact |
| Zdroj: | Journal of The Electrochemical Society. 140:1884-1889 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.2220733 |
| Popis: | There has been controversy recently regarding the interpretation of measurements from scratched electrodes. In this work, a discussion of the various effects of ohmic drop on bared surface measurements is presented. Experiments were conducted in which the interaction between the surrounding filmed surface and the bared surface was studied. The experimental variables investigated were the ratio of the filmed to bare areas and the solution conductivity. The results indicate that a large ohmic drop in the solution can cause the surrounding filmed surface to affect the measurement. In all cases, the effect is a decrease in the peak current measured. In some cases, the ohmic drop can also cause a spreading of the current transient. These results show that the use of as small a bared area as possible is the most effective means to reduce the errors associated with ohmic drop. The implications of these effects on bared surface measurements are discussed, as are techniques to minimize them. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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