Author:

Keywords:

0303 Macromolecular and Materials Chemistry, 0306 Physical Chemistry (incl. Structural), 0912 Materials Engineering, Energy

Abstract:

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