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Corrosion Service developed the ACC3 based on the latest research to allow pipeline operators to more accurately monitor the risk of AC corrosion. This will help operators avoid unnecessary AC mitigation due to false positives but remain sensitive to the worst case for AC corrosion. The ACC3 is suitable for use with new and existing pipelines.

Installation is quick and efficient since this coupon can be positioned next to the monitored structure in holes excavated by hand or by hydrovac. The AC coupon is typically connected to a pipeline at test posts through a shunt resistor (e.g., 10 Ω). After a short stabilization period, the AC voltage (shock hazards), and AC and DC current densities (AC corrosion) can be recorded.



Features & Benefits

  • Improved ability to simulate coating holidays due to the customizable coating thickness 20 mils, 40 mils, 80 mils or custom to meet customer's project demands.
  • Coating holiday size 1 cm2 or 1 in2.
  • Non-conductive surface surrounding the bare area optimized to limit electrical field distortion while maintaining a compact installation size.
  • Designed to allow for coupon pointing up placement to match the orientation of coating holidays with the highest AC current densities. + Weighted steel core with removable coating for corrosion rate measurements as per ASTM G1-03.
  • Stamped with a serial number protected from corrosion for improved traceability
  • Accurate AC corrosion risk assessment to avoid unnecessary mitigation costs.
  • Regular monitoring provides the pipeline operator with historical and current operating conditions, identifies areas requiring AC mitigation, and validates the effectiveness of AC mitigation systems.
  • Improved ability to simulate corrosion rates by allowing for the lateral extension of the corrosion pit under the coating.
  • Compatible with remote monitoring and conventional survey equipment.
  • Compatible with new and existing test stations
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