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 Voltage Gradient (ACVG) surveys pinpoint buried pipeline coating defects and holidays, helping operator teams evaluate pipeline integrity and protect critical underground infrastructure.

Cathodic protection testing must be performed on a regular basis to maintain regulatory compliance and ensure continued corrosion protection of your assets. MATCOR conducts annual CP surveys that go beyond checking a box—our technicians collect the data, and our corrosion engineers interpret it and act on it.