| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5368605 | Applied Surface Science | 2010 | 6 Pages |
Abstract
A passive film was formed on electroless Ni-P coating (ENPC) in a bath of K2Cr2O7 30Â g/l. XPS and electrochemical methods were employed to analyze its chemical compositions and corrosion behaviors. The potentiodynamic polarization tests indicated the corrosion current of the passivated sample was 1/30 that of as-plated ENPC. The XPS analysis illustrated the film comprised Cr, Ni and O. The film thickness was evaluated to be a few nanometers according to the sputtering rate of Ar+ ion. High-resolution XPS spectra suggested that the detected Cr in film was in the form of trivalent compounds, Cr2O3 and Cr(OH)3.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Songlin Mu, Ning Li, Deyu Li, Liying Xu,