Agitation, current density distribution

In brief, deposited metal distribution depends on the shape and dimensions of the object, the geometry of the plating cell, the conductivity of the bath, the shapes of the polarization curves, CE-current density (or similar) curves, and the effect of agitation. 

Macrothrowing power predicts the ability of an electrolyte to lay down as nearly as possible a uniformly thick deposit across the surface of a workpiece. A good covering power is a prerequisite for good macrothrowing power. Other factors that affect macrothrowing power include the current distribution and current density, electrolyte composition, electrolytic conductance, and electrolyte agitation. 

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