Relationship between d.c. volts and electrolysis in steel

  • #1

Main Question or Discussion Point

We use a 10v a.c. signal through to a small steel sensor (SMO 254) in wastewater - and the control device looks for a conductive path to ground to determine that the level of liquid is over the sensor.

We don't use d.c. because of the electrolysis effect - but the circuit we use could have a d.c. component - which might mean that over a period of time the sensor gets eaten away.

Is there a graph or formula for increases in d.c. voltage vs electrolysis effect (e.g. mm/yr)?

Thanks
Steve
Brisbane
 

Answers and Replies

  • #2
Astronuc
Staff Emeritus
Science Advisor
18,706
1,720
One probably wants to find the polarization curve, i.e. applied potential vs log I (current), for SMO 254.
 

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