Tribo-Ellipsometry: A New Technique to Study the Relationship of Repassivation Kinetics to Stress Corrosion

Optical and Electrocatalytic Properties of Oxide Layers

“…-Thin oxide films grown on fresh Ti surfaces which have been mechanically abraded in-situ, can be optically monitored according to a procedure similar to that suggested by Ambrose and Kruger [14]. Such films can be then electroreduced at potentials inside the H, evolution region and are then found to have a much higher absorption coefficient.…”

Current understanding of pitting and crevice corrosion and its application to test methods for determining the susceptibility to such corrosion of nuclear waste metallic containers

“…The results obtained by Pessall and Liu are dependent on the alloy and the environment and can be characterized by a critical potential, Tri bo-el 1 ipsometry Tri bo-el 1 ipsometry is a technique developed to bypass the initiation phase by abrading off the surface oxide and to measure the repassivation of the exposed surface by ellipsometry to determine the film growth kinetics [97,98]. The electrochemical cell with the retracting abrasion wheel is shown in fig.…”

“…Scratch test current-time curves for specimen held potentiostatically above Ep (pitting or breakdown) and below Ep (repassivation). From J. Kruger [98].…”

Repassivation of 304 Stainless Steel Investigated with a Single Scratch Test

“…The combined effects of corrosion and wear involved the removal of the passive film during the wear process and the regrowth of the passive film. The process of removal (or disruption) and regrowth has been studied using several methods in the past, including scratch, 1-7 scraping, [8][9][10] straining, [11][12][13] erosion, [14][15][16] abrasion, [17][18][19] and fracture. 20,21 Reformation of the passive film was measured by recording the current that resulted when a bare surface was formed.…”