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Crevice Corrosion Behavior by Measuring the Potential Inside the Crevice and Repassivation Characteristics of Alloy 600 and Alloy 690
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 Title & Authors
Crevice Corrosion Behavior by Measuring the Potential Inside the Crevice and Repassivation Characteristics of Alloy 600 and Alloy 690
Oh, Se-Jung; Lee, Jae-Bong;
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 Abstract
Crevice corrosion is the accelerated attack occurred in the occluded cell under a crevice on the metal surface. Crevice corrosion behaviors of nickel-based alloys such as Alloy 600 and Alloy 690 were investigated in acidic solution with different chloride ion concentrations. Tests were carried out using the specially designed crevice cell with a very narrow Luggin capillary assembly to measure the potential inside the crevice. It is believed that crevice corrosion in active/passive system like nickel-based alloys has much to do with the properties of passive film and its repassivation characteristics, investigated by the capacitance measurement and by the abrading electrode technique, respectively. An attempt was made to elucidate the relationship between crevice corrosion behaviors, properties of passive film and its repassivation kinetics. Results showed that repassivation rate parameter and/or indicated the possible occurrence of crevice corrosion.
 Keywords
Crevice corrosion;Passive film;Abrading electrode;Repassivation kinetics;Repassivation rate parameter;
 Language
Korean
 Cited by
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