In order to simulate the atmospheric corrosion of steel, artificial steel rust particles were synthesized by aerial oxidation of aqueous solutions containing FeC
l2, FeSO
4 and NaNO
3 and the structure and morphology of the obtained particles were characterized by XRD and TEM. Needle-like SO
42- containing Schwertmannite (Fe
8O
8(OH)
6(SO
4)) particles were formed in FeCl
2-FeSO
4, FeSO
4-NaNO
3, FeCl
2-FeSO
4-NaNO
3 solutions and the crystallization and particle growth of this material were not altered by added Cl
- and NO
3-. While, the spindle-shaped
β-FeOOH particles were formed from in only FeCl
3-NaNO
3 solution, though no marked change in crystallite and particle sizes of
β-FeOOH was recognized by adding NO
3-. Accordingly, it can be suggested that the corrosive SO
X gas strongly affects on the rust formation in atmospheric corrosion of the steels.
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