Eddy Current Testing
Eddy current testing uses electromagnetic induction to detect surface and near-surface defects or material changes in conductive materials.
What this term means in maintenance
Eddy current testing uses electromagnetic induction to detect surface and near-surface defects or material changes in conductive materials.
Common applications
ECT may be used for:
- Heat-exchanger tubes
- Condenser tubes
- Aircraft components
- Surface cracks
- Conductivity checks
- Coating thickness
- Material sorting
Practical example
Heat-exchanger tubes are inspected for wall loss and cracking without removing each tube.
How it works
An alternating electromagnetic field induces currents in the material. Defects and material changes alter the response.
Limitations
Results are affected by geometry, conductivity, permeability, lift-off, and probe selection.
Common mistake
Interpreting signals without suitable calibration standards and trained analysis can produce false conclusions.
How this term differs
Eddy Current Testing is electromagnetic testing of conductive materials. It is related to Magnetic Particle Testing, Ultrasonic Testing, and Liquid Penetrant Testing, but these terms describe different records, measures, roles, strategies, or decisions and should not be used interchangeably.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Nondestructive Testing
Nondestructive Testing, or NDT, examines materials, components, and structures for defects without damaging their intended usefulness.
Condition Monitoring
Condition monitoring is the systematic collection and review of equipment-condition information to identify deterioration, abnormal operation, or developing failure.
Static Equipment
Static equipment is process or facility equipment without a primary rotating mechanism, such as vessels, tanks, piping, structures, and heat exchangers.
Glossary FAQs
- What does ECT stand for?
ECT stands for Eddy Current Testing.
- What materials can eddy current testing inspect?
Electrically conductive materials.
- Where is it commonly used?
Heat-exchanger tubes, surface cracks, conductivity checks, and coating measurements.