Flathead 1, 1 cm2 Steel Coupon for Cathodic Protection by Farwest Corrosion

An Industry Standard. Available with Single or Dual Test Lead Cables

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 measurments includes:

  • 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 induced AC issues.
  • Use as an isolated coupon to evaluate native or unprotected potentials.

Flathead-1 Coupon

The "Flathead-1" steel coupon is a 1 cm2 coupon made from 1018 alloy steel.  The steel coupon is flush mounted inside a durable PVC housing.  This coupon includes a specified length of #12 AWG stranded copper cable with RHH/RHW direct burial insulation, typically green in color.

Coupon Ordering Information

  • Specify the Flathead-1 steel coupon
  • Select the number of cable lead wires, 1 or 2, for the coupon
  • Choose a cable length of 25, 50, 75 or 100 feet.
  • Select a cable insulation color (green is the Farwest standard) such as white, blue, orange, etc.

Cyclone 10 Single Cable Lead

Cyclone 10 Dual Cable Lead

Flathead 10 Single Cable Lead

Flathead 10 Dual Cable Lead


Hemi 10 Single Cable Lead

Hemi 10 Dual Cable Lead

Hemi 10 Three Cable Lead