PDT Services
PULSED EDDY CURRENT
ADDITIONAL ADVANCED NON-DESTRUCTIVE TESTING METHODS THAT WE USE:
Electromagnetic inspection technology used to detect defects and corrosion in ferromagnetic materials
Provides a relative wall thickness measurement through liftoff:
- Non-metallic pipe protection (concrete, composite wraps, coatings)
- External corrosion product (scabs, blisters)
- Insulation
- Marine growth
PEC is applicable in case of
Scab and blistering on the object surface
PEC measures the remaining thickness of conductive material, not the corrosion product layer.
CUI - Corrosion under insulation
PEC/PECA inspect through insulated structures, protected or not with weather jacket
This units supports aluminum, stainless and galvanized steel weather jackets
FAC - Flow accelerated corrosion
PEC is suitable for measuring corrosion in elbows and other limited access. Areas
CUF - Corrosion under Fireproofing and Concrete
PEC measures remaining wall thickness through concrete, polymer coating,
metallic mesh and reinforcing bar.
PEC technique is based on analysis of the transient eddy current inside a conductive component following a sharp electromagnetic transition. The acquisition cycle occurs in 3 phases:
- Emission phase (the pulse): Probe injects magnetic fields that penetrate and stabilize in the component thickness.
- Cut-off phase: Magnetic field emission is stopped abruptly, which induces strong eddy currents in the component.
- Reception phase: Receiver measures the decay of the eddy currents as they diffuse into the material thickness.
Decay rate of eddy currents directly related to thickness.
