Abstract
Galvanostatic anodic polarization is sometimes used to study pitting of stainless steel, but has never been very popular despite the clear and interpretable results that can be obtained. In this paper it is shown that the galvanostatic technique provides a rapid way of assessing the relative performance of different heats of a particular stainless steel, or the stabilizing effects of inclusions and sulphur anions on pit growth. It is suggested that the importance of slow scan rate in potentiodynamic tests has been exaggerated, and that the most appropriate combination of test methods is a relatively rapid potentiodynamic scan and a galvanostatic test (or series of tests) at very low anodic current, to test the stability of localized corrosion over a relevant time scale. Remarkable evolutionary phenomena occur when a population of active pits is grown by a low applied current, and these dynamics must be relevant to the long-term performance of passive alloys in practice.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
