Detection of Pitting on Cast Iron with AC Impedance Spectroscopy

Autor:	Yiqi Feng, B. H. Loo, Akira Fujishima, Guo-ding Zhou
Rok vydání:	1992
Předmět:	Chemistry Open-circuit voltage Metallurgy General Chemistry engineering.material Investigation methods Ac impedance spectroscopy engineering Pitting corrosion Cast iron Composite material Polarization (electrochemistry) Electrical impedance Electrode potential
Zdroj:	Bulletin of the Chemical Society of Japan. 65:2315-2318
ISSN:	1348-0634 0009-2673
DOI:	10.1246/bcsj.65.2315
Popis:	The pitting behavior of high-chromium cast iron has been studied with AC impedance spectroscopy. When impedance measurements are carried out at open circuit potentials, it is observed at the initial stage of pitting that with increasing time, the polarization resistance R decreases for the better pitting resistant specimen, and increases for the poorer one. However, when the electrode potential is suitably fixed during the measurements, the R value shows an abrupt decrease at the initial stage for the sample with a poorer pitting resistance. This large change in the R value indicates the initiation of the pitting process and thus can be used for detecting such onset.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d84d70e59b867cc462491730815a4dd https://doi.org/10.1246/bcsj.65.2315 Zobrazit plný text záznamu