Nanocrystalline electrodeposits show tremendous improvements in many physical andmechanical properties compared to their conventional polycrystalline counterparts. Of particularconcern for their applications as corrosion and wear resistant coatings is their intrinsic resistanceto corrosive environments. This paper reviews recent advances in the understanding of thecorrosion properties for several nanostructured pure metals (e.g., Ni and Co), alloys (e.g., Ni-P,Co-Ni-Fe) and composites (e.g., Ni-SiC). It will be shown that in many of these materials, grainsize reduction to the nanometer range results in considerable improvements in their resistance tolocalized corrosion such as pitting, intergranular attack and intergranular stress corrosioncracking.
展开▼
