Loading...
Please wait, while we are loading the content...
Similar Documents
Corrosion and wear properties of Zn–Ni and $Zn–Ni–Al_{2}O_{3}$multilayer electrodeposited coatings
| Content Provider | Scilit |
|---|---|
| Author | Shourgeshty, M. Aliofkhazraei, M. Karimzadeh, A. Poursalehi, R. |
| Copyright Year | 2017 |
| Description | Journal: Materials Research Express Zn–Ni and $Zn–Ni–Al_{2}O_{3}$ multilayer coatings with 32, 128, and 512 layers were electroplated on a low carbon steel substrate by pulse electrodeposition under alternative changes in the duty cycle between 20% and 90% and a constant frequency of 250 Hz. Corrosion behavior was investigated by potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) and wear behavior of the coatings was evaluated by a pin on disk test. The results showed that the corrosion resistance of coatings was improved by increasing the number of layers (the decrease in layer thickness) as well as the presence of alumina nanoparticles. The lowest corrosion current density corresponds to $Zn–Ni–Al_{2}O_{3}$ with 512 layers equal to 3.74 µA $cm^{−2}$. Increasing the number of layers in the same total thickness and the presence of alumina nanoparticles within the coating also leads to the improvement in wear resistance of the samples. The coefficient of friction decreased with increasing number of layers and the lowest coefficient of friction (0.517) corresponds to $Zn–Ni–Al_{2}O_{3}$ coating with 512 layers. Wear mechanism of Zn–Ni coatings with a different number of layers is adhesive while in the $Zn–Ni–Al_{2}O_{3}$ coatings wear mechanism is a combination of adhesive and abrasive wear, where by increasing the number of the layers to 512 abrasive wear mechanism becomes dominant. |
| Related Links | http://iopscience.iop.org/article/10.1088/2053-1591/aa87d5/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/aa87d5 |
| Journal | Materials Research Express |
| Issue Number | 9 |
| Volume Number | 4 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2017-09-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Coatings and Films |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
