ABSTRACT
The electrochemical behaviour in various electrolytes of nanocrystalline Ni coatings obtained by ball milling was investigated by potentiodynamic test methods and compared with that of polycrystalline Ni. The results are discussed and the passivation mechanism is proposed.
Nanocrystalline materials are polycrystalline materials with grain sizes of up to about 100 nm. Because of the extremely small dimensions, a large fraction of the atoms in these materials is located at the grain boundaries, and this confers special attributes.
