| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8026657 | Surface and Coatings Technology | 2015 | 6 Pages |
Abstract
Exploiting different pulsed current procedures (slow square pulse mode), combining different duty cycles and current levels it was possible to obtain thick and hard anodic oxides with a good interfacial adhesion. The optical microscopy characterization shows that the use of pulsed current minimizes the growth of defects at the oxide/alloy interface caused by the presence of intermetallic precipitates characteristic of AA 7075-T6. Moreover nano-indentation profiles, evaluated along the coatings cross section, highlight the oxide hardness increase of the samples obtained employing pulsed current cycles (PC) compared to those obtained with standard direct current process (DC) or multistep direct current procedures (MSDC).
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Andrea Bozza, Roberto Giovanardi, Tiziano Manfredini, Paolo Mattioli,