| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7893151 | Corrosion Science | 2018 | 57 Pages |
Abstract
In this study, we demonstrate the strategic replacement of Mo with excess Cr in Fe-Cr alloys and report their corrosion resistances. To better understand pitting corrosion, the electrochemical properties of the passive films observed on different alloys (Fe-20Cr-2Mo and Fe-25Cr) were compared. Mo-free Fe-25Cr offered comparable or better pitting corrosion resistance than Fe-20Cr-2Mo during film breakdown, repassivation, and pit propagation stages. We investigated the reason for enhanced stability against pitting corrosion as a result of Mo exclusion in such alloys. Mo accelerated co-dissolution of Fe and Mo itself, consequently enriching Cr on the surface and ultimately promoting onset of passivity.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
KiMin Jung, SooHoon Ahn, YoungJun Kim, SeKwon Oh, Won-Hee Ryu, HyukSang Kwon,