*3.1.2. pH*

Electrolytes are prepared either acidic (nickel, copper, zinc and tin coating baths) or basic (zinc, cadmium, brass, gold and silver baths). It is important to know the pH in order to control and maintain the electrolyte composition stable for long term use. The electrolytes above or below specified pH values which show the acidic-basic characteristics affect and, generally decrease the coating quality [10].

In their research, Jia Man et al. [11] studied the zeta potential to describe the surface electrical behavior of nano-particles. Changes in the pH value of electrolyte can influence zeta potential. That means, zeta potential and pH are closely related to each other to determine the dispersive condition of particles in electrolytes.
