Electrochemical noise analysis methods for the investigation of corrosion processes

Janusz M. Smulko

doi:10.1117/12.515263

8 May 2003 Electrochemical noise analysis methods for the investigation of corrosion processes

Janusz M. Smulko

Proceedings Volume 5115, Noise and Information in Nanoelectronics, Sensors, and Standards; (2003) https://doi.org/10.1117/12.515263
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

Abstract

Electrochemical corrosion processes can be investigated by observation of the charge flow between electrolyte and the corroding metal. Usually, the charge flow is observed as spontaneous current and voltage fluctuations (electrochemical noise) in a three-electrode setup. Different types of corrosion processes can be recognized by electrochemical noise analysis. Uniform corrosion rate can be evaluated by estimation of polarization resistance between metal and electrolyte. Local corrosion events (breakdowns of the passive layer) that produce characteristic transients observed in noise can be detected. The different methods of electrochemical noise analysis are presented. The limitations and advantages of the method for corrosion monitoring and research are underlined. The experimental results are also discussed.

Citation Download Citation

Janusz M. Smulko "Electrochemical noise analysis methods for the investigation of corrosion processes", Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); https://doi.org/10.1117/12.515263

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