Abstract
Repassivation kinetics of wear scars on AISI 304 stainless steel immersed in sodium chloride and sodium phosphate solutions are studied by electrochemical noise and potentiostatic techniques. The classical high-field ion conduction model is used to quantify the repassivation kinetics of tribo-activated stainless steel surfaces under potentiostatic conditions. A modified ion conduction model is proposed to quantify the repassivation kinetics at open-circuit potential. This model provides a unique approach to investigate potential and current transients with charge density in freshly generated wear scars, and to derive the parameters of the repassivation kinetics of wear scars. © 2004 The Electrochemical Society. All rights reserved.
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