An electrochemical study of phase-transitions in rust layers |
| |
Authors: | M Stratmann K Bohnenkamp H-J Engell |
| |
Affiliation: | Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, FRG |
| |
Abstract: | Isolated rust layers have been investigated by electrochemical methods to find out whether their reduction and re-oxidation can affect the atmospheric corrosion of iron. At potentials below 0 mV, first a thin Fe2+-containing surface layer is formed on top of the γ-FeOOH. This reduced surface layer can dissolve into the cell electrolyte at acid pH, or at lower potentials the Fe2+-ions can react with γ-FeOOH to Fe3O4. The formation of magnetite could be followed by in-situ magnetic measurements. The reduced surface layer can easily be oxidized back to γ-FeOOH, magnetite can partly be oxidized to γ-Fe2O3. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|