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Detect Corrosion
Evaluate the Corrosivity
of each Defect

EMPIT’s patented CMI technology distinguishes between passivated and active corrosion in buried pipelines without interruption, delivering the resolution for confident decisions.

Corrosion or Not?
We Qualify the Difference

A yellow wireframed pipeline with a coating defect as deformation of the grid in red. A circle shows a schematic image of the pipeline wall loss due to corrosion.

Active Defect

Pinpoint active corrosion with one single aboveground survey— CMI reveals which coating flaws are causing metal loss.

Key Characteristics

  • A non‑capacitive, ohmic current attenuation at a coating defect reveals bare steel in soil contact, confirming the corrosion cell is active and driving metal loss.
  • CMI geo‑tags each corrosion hotspot on the pipeline so crews can excavate, re‑coat, or adjust CP only where intervention is truly needed.
  • Eliminates unnecessary digs, concentrates costs on real threats, and extends asset life without disrupting product flow.

Read more

A yellow wireframed pipeline with a coating defect as deformation of the grid in yellow. A circle shows a schematic image of a passivating layer on top of the pipeline wall protecting from corrosion.

Passivated Defect

Skip the dig—CMI detects the capacitive fingerprint of calcareous deposits, proving the defect is sealed and no longer a threat.

Key Characteristics

  • A capacititve current leakage at a defect signals a calcareous film on the steel surface, proving the corrosion cell is electrically blocked and passive.
  • Log GPS referenced locations in your ECDA programme; routine potential checks or periodic CMI sweeps are sufficient—no urgent digs or CP adjustments required.
  • Avoids unnecessary excavation costs and keeps product flowing while maintenance crews focus on real threats elsewhere.

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Key Features

Precision Insights

Seamless Compatibility

Non-
Intrusive

Pinpoint and rank active corrosion hotspots down to <1 cm³, enabling targeted maintenance, repair and replacement planning.

Integrates seamlessly with your External Corrosion Direct Assessment (ECDA), Pipeline Integrity Management Systems (PIMS) and other workflows.

Aboveground CMI inspects buried pipelines without pigging or Inline Inspection (ILI), excavation, or shutdown, drastically slashing risk and cost.


How does EMPIT separate active from passive defects?
With patented spectrum analysis that unfolds in custom-built hardware.

See the Tech behind it

Corrosion Integrity
Applications

Coating Defects


Stray Current Corrosion


AC Interference


Defect Evolution Tracking

Coating Defects


EMPIT pinpoints up to 10 × more coating holidays than conventional over‑the‑line surveys by analysing current attenuation across a continuous multi‑frequency spectrum.

A PE coated pipeline with an emerging wirefram grid pipeline with a coating defect detected from aboveground.

Stray Current Corrosion


Detect corrosion caused by unintended electrical currents near DC-powered systems or rail infrastructure.

A yellow wireframed grid below crossing train tracks below ground, shwoing the problematic of DC impressed current on the pipeline.

AC Interference


Identify corrosion risks from alternating current coupling, especially near high-voltage power lines or substations.

A yellow wireframed pipeline below a topographic ground with overland electricity lines, showing the detection of AC interference on pipelines

Defect Evolution Tracking

Monitor the progression of defects over time through repeated signal analysis — for smarter intervention planning.

Segmented frames showing one coating defect evolutioning over time for defect evolution tracking.

Want to learn more about CMI Technology?
From assumptions to actions.

Talk to an Expert

Logo EMPIT GmbH

Inspect The Unpiggable

+49 (0) 30 51656040
info@empit.com

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