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 (%) |
| Steel | 15.260 | −0.554 | 368.48 | 44.93 | 3.768 | 0.358 | 0 | ZNP 1 | 4.100 | −0.532 | 11.60 | 21.42 | 74.646 | 0.096 | +73.13 | ZNP 2 | 5.630 | −0.534 | 32.16 | 26.95 | 27.892 | 0.132 | +63.10 | ZNP 3 | 8.094 | −0.387 | 48.32 | 39.84 | 13.035 | 0.192 | +46.95 | ZNP 4 | 8.201 | −0.490 | 47.55 | 38.64 | 13.173 | 0.192 | +46.26 | ZNP 5 | 10.480 | −0.411 | 75.94 | 41.27 | 12.352 | 0.245 | +31.32 | ZNP 6 | 12.130 | −0.414 | 84.00 | 42.10 | 14.292 | 0.279 | +25.36 |
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: corrosion current. : corrosion potential. and : Tafel slopes (cathodic and anodic). : polarization resistance. RC: corrosion rate. : corrosion protection efficiency.
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