Parametric optimization of corrosion and wear of electroless Ni-P-Cu coating using grey relational coefficient coupled with weighted principal component analysis

Journal of Materials Science: Materials in Engineering

Table 1 Main coating parameters with their levels

Design factors	Levels
Design factors	1	2	3
Concentration of source of nickel (nickel sulphate solution) (g/l)	25	30	35
Concentration of reducing agent (sodium hypophosphite solution) (g/l)	10	15	20
Concentration of source of copper (copper sulphate) (g/l)	0.3	0.5	0.7
Heat treatment temperature (°C)	300	400	500