Abstract
The electrochemical properties of the passive film formed on surface-modified 301 stainless steel (SS) were examined in the present study. After surface treatment, the passive film analysis was carried out via X-ray photoelectron spectroscopy (XPS) technique, while the surface microstructure of the samples was examined by scanning electron microscope analysis. With Cr 2p, Fe 2p, O 1s, Ni 2p, and C 1s as the principal spectra in the passive film, the Cr 2p spectrum shows two major peaks at 574.3 eV and 583.8 eV corresponding to Cr 2p3/2 (Cr in the metallic state) and Cr 2p1/2, respectively. The Fe 2p spectrum has two major peaks of 707.1 and 720.1 eV corresponding to Fe 2p3/2 (Fe in metallic state) and Fe 2p1/2 peaks, respectively, while the binding energies of 853.3 and 875.1 eV for the Ni 2p spectrum correspond to nickel in the metallic state. The XPS spectra revealed a higher percentage of Cr in the passive film of the treated 301 SS when compared with other elements. From the polarization results, the treated 301 SS possessed a lower corrosion current density of 1.401 mA/cm2 and higher corrosion potential of − 0.085 V.
Original language | English |
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Pages (from-to) | 886–891 |
Number of pages | 6 |
Journal | MRS Advances |
Volume | 7 |
Issue number | 31 |
Early online date | 4 Aug 2022 |
DOIs | |
Publication status | Published - 2022 |