Constant current vs constant voltage

[balasparks]

Which mode is best for Electro cleaning (cathodic cleaning ) in reel to reel plating .

Constant current or constant voltage ?

Kindly give me a solution and reason behind the fact too .

 

[Ultrax]

The solution is to study Ohm's law. The current depends on the area of the electrodes (specifically, their resulting resistance in your electrolyte). The current strength I(t) is a derivative of the plate charge Q'(t).

 

[balasparks]

The solution is to study Ohm's law. The current depends on the area of the electrodes (specifically, their resulting resistance in your electrolyte). The current strength I(t) is a derivative of the plate charge Q'(t).

Thanks for the reply . In constant voltage mode I observed peel off . In constant current mode there is no such issue .

And our line is a reel to reel plating line

 

[Ultrax]

Reel-to-reel plating of what metal? Substrate metal type? Type of electrolyte? Temperature? Speed of deposition? Size of electrodes that are in the electrolyte at the same time interval. If you have to manage current constancy instead of voltage and the square area of electrodes is the same in each measured time interval during your process, that means too fast changes in the chemical structure of your electrolyte. Is it desirable?

 

[Ultrax]

P. S. Please also clarify if we are talking about iron electro-cleaning or deposition of other metals.