Research Article

Microstructural Characterization and Corrosion Behavior of Electroless Ni-Zn-P Thin Films

Table 4

Kinetic corrosion parameters for the steel substrate and studied samples.

Sample (μA/cm2) (V versus SCE) (mV) (mV) (Ωcm2)RC (mm/an)E (%)

Steel15.260−0.554368.4844.93 3.7680.3580
ZNP 14.100−0.53211.6021.4274.6460.096+73.13
ZNP 25.630−0.53432.1626.9527.8920.132+63.10
ZNP 3 8.094−0.38748.3239.8413.0350.192+46.95
ZNP 48.201−0.49047.5538.6413.1730.192+46.26
ZNP 510.480−0.41175.9441.27 12.3520.245+31.32
ZNP 612.130−0.41484.0042.10 14.2920.279+25.36

: corrosion current.
: corrosion potential.
and : Tafel slopes (cathodic and anodic).
: polarization resistance.
RC: corrosion rate.
: corrosion protection efficiency.