CHEM02200704003 Nilamadhab Pandhy - Homi Bhabha National ...

Chapter 4
normal Cr 2 O 3 , and Fe 2 O 3 peak around 530.8 eV, and 530.1 eV, respectively (Fig. 4.11b). The
chromium, and oxygen profile for 304L SS passivated in 0.5 M nitric acid were similar to that of
0. 1 M nitric acid.
Intensity (Arbitrary Units)
Cr2p 3/2
(0.1 M HNO 3
)
Cr 0
Cr 2
O 3
Cr(OH) 3
580 578 576 574 572
Binding energy (eV)
Fig. 4.11a: XPS profile of Cr2p 3/2 of 304L SS passivated in 0.1 M HNO 3 .
Intensity (Arbitrary units)
O1s (0.1 M HNO 3
)
Fe 2
O 3
Cr 2
O 3
Cr(OH) 3
535 534 533 532 531 530 529 528 527
Binding energy (eV)
Fig.4.11b: XPS profile of O1s of 304L SS passivated in 0.1 M HNO 3 .