Inhibition effects of inorganic multivalent cations on iron corrosion in aerated sodium sulfate solution
- Keio Univ., Hiyoshi, Yokomama (Japan). Faculty of Science and Technology
Inhibition effects of inorganic multivalent cations on corrosion of Fe in an aerated 0.5 M sodium sulfate (Na{sub 2}So{sub 4}) solution were investigated using polarization measurements. The cations formed deposit layers of their hydroxides on the Fe surface by reactions with hydroxide ions (OH{sup {minus}}) afforded through the cathodic process of Fe corrosion. Some layers on the surface were analyzed by x-ray photoelectron spectroscopy (XPS) and electron probe microanalysis (EPMA). Since the cations suppressed the cathodic process but stimulated the anodic one, their inhibition efficiencies were not markedly high. Inhibition effects of the cations on the cathodic process were related closely to the hard and soft acids and bases (HSAB) principle because the effect increased with the hardness of a cation as an acid.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 315925
- Journal Information:
- Corrosion, Vol. 55, Issue 2; Other Information: PBD: Feb 1999
- Country of Publication:
- United States
- Language:
- English
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