Techniques for Studying Initial Film Formation on Newly Generated Surfaces of Passive Metals.

摘要

Development of an understanding of stress corrosion cracking and corrosion fatigue requires a knowledge of the electrochemical behavior of the new metal surface generated at the crack tip. Newly generated metal surfaces have very different electrochemical properties from the steady state exterior surfaces of the metals which are covered by oxide films. The purpose of this paper is to review new surface experiments reported in the literature and examine advantages and limitations of the various techniques. Techniques to obtain new metal surfaces may be divided into five categories: (1) Form droplets of liquid metal, (2) scrape or abrade a surface, (3) strain a wire, (4) rapidly shear a wire, and (5) rapidly fracture a notched specimen. (Author)