Potentiodynamic Polarization Behaviour of Electroless Ni-P-W Coatings

Table 1

Electroless bath composition and operating condition.

Bath constituents	Values	Operating condition	Values
Nickel sulphate (g/L)	20–30	pH	7-8
Sodium hypophosphite (g/L)	14–20
		Temperature	90 ± 2^°C
Sodium citrate (g/L)	35
Ammonium sulphate (g/L)	30	Duration of coating	3 hrs
Lactic acid (g/L)	5
		Bath volume (mL)	200
Sodium tungstate (g/L)	15–25