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Factors affecting the determination of electrochemical noise resistance
journal contribution
posted on 1999-01-01, 00:00 authored by Mike Yongjun TanMike Yongjun Tan, S Bailey, B KinsellaThe similarity between electrochemical noise resistance (Rn) and polarization resistance (Rp) has been confirmed in many laboratories, and a new method for corrosion rate determination has been developed based upon this similarity. However, this method remains controversial. Some researchers have reported experimental results that did not support a similarity between Rp and Rn. Other researchers have found that this similarity does not hold true for every system. To address this controversy, factors affecting the measurement and calculation of Rn were investigated. Several factors - including instrument noise, direct current (DC) trend, noise sampling rates, and noise sampling duration - can affect the accuracy of Rn determination signiftcantly and, in some cases, can cause disagreement between Rn and Rp. It was recommended that a system check be carried out to avoid the influence of these factors.
History
Journal
CorrosionVolume
55Issue
5Pagination
469 - 475Publisher
NACE InternationalLocation
Houston, Tex.Publisher DOI
ISSN
0010-9312eISSN
1938-159XLanguage
engNotes
This paper was presented at CORROSION 1998 : The Annual NACE Corrosion ConferencePublication classification
C1.1 Refereed article in a scholarly journalUsage metrics
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