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

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.

Created by: Pipeline Corrosion Control

Last updated 11/2025

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Description

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
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