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

Figure 6

SEM images of Ni-Cu-P-Al₂O₃ electroless composite coatings obtained from plating bath containing different concentration of nano-Al₂O₃ particles: (a) 5 ppm, (b) 20 ppm, and (c) 1000 ppm.

(a)

(b)

(c)