Research Article
Potentiodynamic Polarization Behaviour of Electroless Ni-P-W Coatings
Table 2
Design factors and their levels.
| Design factors | Unit | Levels | 1 | 2 | 3 |
| Concentration of source of nickel (nickel sulphate solution) (A) | g/L | 20 | 25a | 30 | Concentration of reducing agent (sodium hypophosphite solution) (B) | g/L | 14 | 17a | 20 | Concentration of source of tungsten (sodium tungstate) (C) | g/L | 15 | 20a | 25 | Annealing temperature (D) |
°C | 400 | 500 | 600 |
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nitial coating condition.
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