Physical characteristics of metal deposits:

It is significant in which the deposits produced through electrolysis is pure, tightly adherent, dense and smooth so which it could be washed, dried and weighed without any mechanical loss.  The Spongy, powdery or flaky deposits are probable to be less pure and less adherent.

As described previously the principal factors which influence the physical features of deposits are current density, the presence of complexing agents and temperature. Normally the best deposits are created at current densities which are less than 0.lA /cm².

Stirring commonly improves the quality of a deposit.  A time of deposition is decreased while the solution is stirred vigorously or if the electrode is rotated at a uniform speed. This kind of stirring lowers the attention overpotential and enables a higher current density without any adverse effect.

Simultaneous evolution of gas at an electrode, in during deposition is not a desirable factor, because continuous evolution of bubbles on the electrode surface disturbs the orderly growth of the crystal structure of a metal deposit.  Spongy and Porous deposits are acquired if there is continuous evolution of gases.