Effect of Deposition Time on the Morphological Features and Corrosion Resistance of Electroless Ni-High P Coatings on Aluminium

Table 3

Measured hardness values of the coating deposited for different durations.

Coating time	Hardness (Hv)
	Mean	Range
Base material	43	42–44
15 minutes	72.5	66–77
30 minutes	78.2	74–86
1 hour	94.7	87–102
2 hours	125	116–145