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08389 Microelectrochemical Techniques for Characterization of the Behavior of Corrosion Resistant Alloys (CRA)

Picture for 08389 Microelectrochemical Techniques for Characterization of the Behavior of Corrosion Resistant Al
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Product Number: 51300-08389-SG
ISBN: 08389 2008 CP
Author: Thomas Ladwein, Matthias Sorg, and Jens Maier
Publication Date: 2008
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An microcell that permits electrochemical investigations on small areas on top of a metallic surface has been developed and its use is demonstrated by characterizing the corrosion behaviour of stainless steels. The area covered is as small as 0.2 mm². Techniques that are applied include standard direct current (DC) techniques like anodic polarization scans as well as impedance and electrochemical noise analyses. These techniques permit to differentiate between different states of passivation. By the use of the Electrochemical Reactivation (EPR) tests the detection of sensitization and chromium depleted zones could be shown. In this type of measurement the sensitivity of the test is improved due to a higher ratio of depleted to non depleted areas when the total area of the measuring spot is reduced to such small size.
An microcell that permits electrochemical investigations on small areas on top of a metallic surface has been developed and its use is demonstrated by characterizing the corrosion behaviour of stainless steels. The area covered is as small as 0.2 mm². Techniques that are applied include standard direct current (DC) techniques like anodic polarization scans as well as impedance and electrochemical noise analyses. These techniques permit to differentiate between different states of passivation. By the use of the Electrochemical Reactivation (EPR) tests the detection of sensitization and chromium depleted zones could be shown. In this type of measurement the sensitivity of the test is improved due to a higher ratio of depleted to non depleted areas when the total area of the measuring spot is reduced to such small size.
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