In this study, nickel electrodes were sputtered with a smooth iron layer to determine the effect of metallic iron on the electrode surface without significantly changing the electrode surface area.
Furthermore, the effects of iron layer thickness on the growth rate and the diameter of the vertically aligned CNTs were also investigated.
However, further increase of the iron layer thicker than 100 nm did not show significant improvement of degradation rate.
We also demonstrated that the developed lumped parameter approach can represent situations where the system is initially contaminated, and can be used to optimize the thickness of the iron layer.
This pitting corrosion of the iron layer is expected to play an important role in achieving an accelerated in situ generation of ferrous ions.
Iron plaque is layer of iron (hydr)/oxide precipitate around the plant parts caused by oxidation of iron by molecular O2 or by iron oxidizing bacteria (e.g., Ferroplasma sp. and Leptospirillum ferroxidans) (King and Garey 1999).
To prove that the voltage change wasn't caused by something else, the researchers conducted a control experiment in which they separated the aluminum oxide and the nickel iron with a layer of the metal ytterbium, which destroyed the spin polarization.
Olivines richer in iron than Fa50 are less common; they do occur in the iron-enriched layers of some intrusive rocks, however.
A codeposited coating layer, which shows high oxidation resistance, is mainly characterized by three zones: an outer layer of iron aluminide, a nickel-rich iron aluminide, and an interdiffusion zone consisting of alpha ferrite and nickel aluminide precipitates.
This observation suggests that the initial layer of iron electroplated onto the NCWF has a different structure from the iron of the upper layer.
