Research Article
Effects of Alloying Elements (Cr, Mn) on Corrosion Properties of the High-Strength Steel in 3.5% NaCl Solution
Table 3
Summary on the peaks observed from the Raman spectra of standard samples of iron rust.
| | Standard sample | Peak positions/cm−1 (relative intensity) | Remarks | | 1st | 2nd | 3rd | 4th | 5th |
| | Magnetite | 286 (100) | 396 (54) | 222 (50) | 640 (41) | 475 (22) | Wide | | Maghemite (γ-Fe2O3) | 286 (100) | 396 (54) | 222 (50) | 640 (41) | 475 (22) | Wide; peak at 710 | | Hematite (α-Fe2O3) | 292 (100) | 224 (54) | 410 (44) | 612 (24) | 494 (11) | — | | Goethite (α-FeOOH) | 386 (100) | 301 (29) | 548 (17) | 482 (16) | 245 (13) | — | | Akaganeite (β-FeOOH) | 390 (100) | 310 (87) | 495 (26) | 540 (22) | — | Wide | | Lepidocrocite (γ-FeOOH) | 250 (100) | 378 (57) | 530 (55) | 347 (43) | 308 (23) | — |
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