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Online monitoring of crevice corrosion with electrochemical noise

✍ Scribed by G. Schmitt; K. Moeller; P. Plagemann

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
321 KB
Volume
55
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

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.

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