Potentiostat itself is a rectifier under a branch, with constant potential, constant current function.
Constant potential refers to the reference electrode feedback as a constant standard to control the output of the finishing device.
Very simple, for example, for a newly built pipe, the cathodic protection potential is required to be -1.2V, so the potentiostat is set at -1.2V. In order to meet the -1.2V requirement, the potentiostat will increase its output until the potential is -1.2V. At this time, the output voltage is said to be 10V, and the current is said to be 5A. Then we can say that the required voltage and current of this pipeline to meet the protection requirements are 10V and 5A.
If there is a potential problem, such as interference, reference electrode damage, then how does the potentiostat work?
This requires constant current function, constant current output, that is, the current output does not change, the voltage changes. So again, if the constant potential is broken, what should I do with the constant current?We through a period of a little awareness of the pipe needs to be current is 5 a, so we should be constant current given in 5 a, best can to test pile, measured with portable reference pipe under the real potential is 1.2 v, if it is, then given in 5 a is appropriate, if is a little small for current, big will reduce some current, This is what people often call a manual run.
