CEMS study of corrosion products formed by NaCl aqueous solution
Conversion electron Mössbauer spectroscopy was used to study corrosion products by NaCl aqueous solution. A drop of the solution is put on an iron foil and the foil is left at RT. During the evaporation of the solution, corrosion products are formed. Conversion electron Mössbauer spectra were taken at temperatures between 15 K and room temperature (RT). In the Mössbauer spectra a ferric doublet is observed at RT, but sextets are found at 15 K. These results show that the corrosion product mainly consists of γ - FeOOH and a small amount of β - FeOOH is noticed. As NaCl concentration increases, the corrosion layer becomes thick and β- FeOOH / γ - FeOOH ratio increases slightly. Consequently, it has been concluded that the produced amount of β- FeOOH increases more rapidly than that of γ - FeOOH with increasing NaCl concentration.
KeywordsCorrosion Product Corrosion Layer Iron Foil Room Temperature Spectrum Sulfuric Acid Water
Unable to display preview. Download preview PDF.
- 1.Nakanishi, A., et al.: In: Ortalli, I. (ed.) Conf. Proc. SIF, Bologna 50, 669 (1996)Google Scholar
- 3.Murad, E., Johnston, J.H.: In: Long G.J. (ed.) Mössbauer spectroscopy applied to inorganic chemistry, vol. 2, p. 507. Plenum Press, New York (1987)Google Scholar
- 8.Fukumura, K., et al.: Nucl. Instr. Meth. A301, 871 (1991)Google Scholar
- 10.Kobayashi, T., et al.: Conf. Proc. In: Ortalli, I. (ed.) SIF, Bologna 50, 899 (1996)Google Scholar