Table 3 Coefficient of friction and average roughness Ra measured in several Ni and Ni/PTFE coatings.
From: PTFE layer formation during brush electroplating of nickel
Coating | Suspension agent | Deposition parameters | Characteristics | Roughness Ra (μm) | ||
|---|---|---|---|---|---|---|
Brush material | Current density (A/dm2) | Deposition time (A·min) | Coefficient of friction | |||
Pure Ni | – | Red | 37 | – | 0.156 ± 0.006 | – |
– | Red | 75 | – | 0.191 ± 0.003 | 5.0 ± 0.8 | |
– | White | 75 | – | 0.269 ± 0.006 | 11.6 ± 1.6 | |
– | White | 124 | – | 0.247 ± 0.012 | 13.7 ± 2.0 | |
Ni/PTFE | IPA | White | 37 | 38 | 0.108 ± 0.001 | 1.8 ± 0.4 |
IPA | White | 37 | 3 | 0.096 ± 0.001 | 1.2 ± 0.3 | |
Ethanol | White | 37 | 38 | 0.117 ± 0.003 | 2.5 ± 0.5 | |
Ethanol | White | 37 | 5 | 0.107 ± 0.004 | 1.1 ± 0.2 | |
