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Online monitoring of crevice corrosion with electrochemical noise
Author(s) -
Schmitt G.,
Moeller K.,
Plagemann P.
Publication year - 2004
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200403812
Subject(s) - crevice corrosion , electrochemical noise , noise (video) , corrosion , electrode , dissolution , materials science , metallurgy , electrochemistry , computer science , engineering , chemistry , chemical engineering , image (mathematics) , artificial intelligence
The time‐related cumulated noise charges extracted from the noise signals between two “identical” crevice electrodes yield a direct quantitative easy‐to‐interpret information on time‐related corrosion intensities in the crevice. A new software‐assisted method of noise data evaluation allows a “counting of coulombs” exchanged between the system electrodes, the results of which directly correlate with the metal dissolution intensity in the crevice. The versatility of this “CoulCount” method is demonstrated in a failure analysis on the cause of crevice corrosion at spigots of automotive cooling water pumps.