Research Article
Characterization of Corrosion Products on Carbon Steel Exposed to Natural Weathering and to Accelerated Corrosion Tests
Table 2
Mössbauer parameters of the specimens exposed for nine months at Cubatão and Paula Souza and to four cycles of the accelerated tests, A and B.
| | ISa·(mm.s−1) | QS· (mm.s−1) | Hf (kOe) | Area occupied by phase (%) | Phases |
| Cubatão | 0.39 0.22 | 0.62 −0.18 | — 324 | 86.4 13.6 | -FeOOH -FeOOH |
| Paula Souza | 0.38 | 0.60 | — | 100 | -FeOOH |
| Test A | 0.36 0.37 0.28 0.46 | 0.59 −0.24 0.08 −0.48 | — 451 493 355 | 12.0 72.6 15.4 | -FeOOH Fe3O4 -FeOOH |
| Test B | 0.39 0.58 0.29 0.36 | 0.62 −0.26 0.06 −0.35 | — 456 493 356 | 22.3 55.4 22.3 | -FeOOH/-FeOOH Fe3O4 -FeOOH |
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The isomer shift values are given related to the Fe-.
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