Electroless Deposition of Ni-Cu-P Coatings Containing Nano-Al₂O₃ Particles and Study of Its Corrosion Protective Behaviour in 0.5 M H₂SO₄

Table 3

Corrosion parameters of coatings in 0.5 M H₂SO₄ derived from polarization measurements.

Concentration of nanoparticles; in the bath (ppm)	(mV versus SCE)	(Ω cm^2)	(mV/dec)	(mV/dec)	C. R.; (mm/year)
0	−430	178.8	61	117	1.14
5	−428	194	86	97	1.20
10	−460	362.3	175	123	1.02
20	−484	790.9	112	114	0.36
50	−473	546.1	90	101	0.44
100	−467	352.3	85	127	0.74
1000	−464	315.3	90	106	0.79