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Cathodic protection coupons are a simple, size-specific piece of metal with one or more wires attached and are used for evaluating corrosion control or cathodic protection systems protecting a structure, typically a steel pipeline. These measurements include:
Native or unprotected structure-to-soil potentials
Structure-to-soil potentials with the CP system energized
Structure-to-soil potentials with the CP system interrupted
To emulate an “OFF” structure-to-soil potential without interrupting CP current, typically referred to as a “Coupon Interrupt” reading
For magnitude measurements of AC current density on a structure with known inducedAC issues
Cyclone-10 Coupon Details
The "Cyclone-10" steel C.P. coupon is a 10 cm2 "barrel" or cylindrical coupon common in C.P. testing.
The coupon is mounted inside a durable PVC housing and the Cyclone-10 is provided with a dual length of #12 AWG stranded copper cable with RHH/RHW direct burial insulation, typically green in color.