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Alternating Current Coating Attenuation (ACCA) Surveys

Alternating Current Coating Attenuation (ACCA) Surveys

An ACCA survey evaluates buried pipeline coating condition by measuring how an applied AC signal attenuates along the line. Sound coating holds the signal; damaged coating bleeds it into the soil. The rate of attenuation qualitatively ranks coating quality by segment and flags the areas with the most significant holidays.
Alternating Current Coating Attenuation (ACCA) Surveys
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ACCA is a screening technique: it covers long distances quickly and requires no soil contact, making it an efficient first pass for prioritizing where DCVG, ACVG, or close interval surveys should focus. Within an ECDA program, ACCA results guide indirect inspection planning and direct examination site selection.

ACCA survey services include:

  • Coating condition ranking by pipeline segment
  • Attenuation anomaly identification and prioritization
  • Survey planning input for DCVG, ACVG, and CIS
  • ECDA indirect inspection support
  • Data analysis by certified corrosion professionals

Alternating Current Coating Attenuation (ACCA) Surveys Key Benefits

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Why MATCOR Services?

MATCOR combines engineering expertise, proprietary products, and specialized installation capabilities to deliver corrosion protection solutions from design through commissioning and beyond.

One Partner, The Right Solution

Engineering, materials, installation, and more from the most techically capable team in the industry.

Leading Installation Capacity

Specialized equipment and dedicated construction crews ready to mobilize.

Engineering-Driven Approach

We don’t simply execute specs—we solve complex corrosion problems. 

50+ YEAR Quality & Safety RECORD

ISO 9001:2015 certified and backed by BrandSafway’s global resources.

Your AC mitigation and CP systems are only as good as the teams that design, install, and manage them. From engineering review through commissioning and annual surveys, here’s how MATCOR gets it right in the field.

Working with MATCOR Services

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