Table 6 The physical and mechanical properties of the coatings.
Samples tests | Commercial one | Group I | Group II | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Nano-ZnO | ZnO/Si | Nano-CuO | CuO/Si | Nano-ZnO | ZnO/Si | Nano-CuO | CuO/Si | ||||
Gloss | 47 | 54 | 51 | 49 | 47 | 57 | 54 | 52 | 49 | ||
Viscosity | 120 | 120 | 121 | 120 | 120 | 125 | 126 | 126 | 128 | ||
Mechanical properties | |||||||||||
Hardness | 160 | 159 | 166 | 158 | 169 | 198 | 208 | 198 | 212 | ||
Ductility | 3.2 | 3.2 | 2.8 | 3.2 | 2.5 | 2.6 | 2.4 | 2.5 | 2.4 | ||
Impact resistance | 1.45 | 1.39 | 1.16 | 1.4 | 1.18 | 1.02 | 1 | 1.02 | 0.98 | ||
Adhesion | |||||||||||
Dry adhesion | 7 | 9.1 | 9 | 8.5 | 8.8 | 10.5 | 12.4 | 9.9 | 11.7 | ||
Wet adhesion | 4.5 | 7.2 | 7.8 | 7.1 | 7.6 | 9.4 | 11.6 | 9 | 10.8 | ||
Adhesion loss | 35.75 | 20.8 | 13.3 | 16.4 | 13.6 | 10.4 | 6.4 | 9 | 7.6 | ||
