Fig. 4
From: PTFE layer formation during brush electroplating of nickel

SEM surface images with high magnification detail of Ni coatings produced with red brush and different current densities and CTAB concentrations: (a) 37 A/dm2 and 3 g/l; (b) 75 A/dm2 and 0.1 g/l; (c) 75 A/dm2 and 0.5 g/l; (a) 75 A/dm2 and 4 g/l.