Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5464794 | Surface and Coatings Technology | 2017 | 6 Pages |
Abstract
The present study demonstrates the formation of an almost Ni-free oxide layer ~Â 180Â nm in thickness on a NiTi surface through anodization in 0.1Â M HNO3 electrolyte. The anodic oxidation of Ti and release of Ni occurred simultaneously during anodization, resulting in the homogeneous growth of the Ti oxide layer on the alloy surface. However, the release of Ni induced the generation of small pits ~Â 10Â nm in size on the surface, which enlarged over time due to a process similar to pitting corrosion. Since the layer growth and pit development were competing reactions that occurred simultaneously, an oxide layer without pits could not be formed through anodization in the HNO3 electrolyte.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Naofumi Ohtsu, Yuma Hirano,