Abstract
The electrochemical behaviour of pure iron in methanol solutions has been investigated. The build-up and stability of a passive state has been evaluated by varying the water content and the concentration of Cl − ions. The water content turns out to be the determining factor for passivity; the presence of Cl − does not allow the build-up and maintenance of the passive state. Iron is always found in solution as Fe 2+. Further experiments have been carried out in dimethylformamide, in order to determine the influence of variations in dielectric constant and in dipole moment of the medium.
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