Eddy Current Inspection – CMH

Conventional NDT Services

Eddy Current

Testing

Detect surface and near-surface cracks, corrosion, wall thinning and conductivity changes in electrically conductive components, without damaging the part.

Inspection Snapshot

Fast electromagnetic inspection of conductive materials

Surface & Weld Examination

Rapid scanning for cracks and local discontinuities

Tube & Component Inspection

Heat exchanger tubes, aircraft parts and precision components

Conductive Material Analysis

Aluminum, copper, stainless steel, nickel alloys and other conductive metals

Discuss your inspection

Certified Personnel

Qualified NDT professionals

Fast Turnaround

Responsive scheduling

Modern Equipment

Calibrated UT instruments

Detailed Reports

Clear inspection findings

Rapid & Sensitive

Inspect conductive components with minimal disruption.

What is eddy current testing?

See small defects through electromagnetic response

Eddy Current Testing (ECT), also called Eddy Current Inspection, is a non-destructive electromagnetic method used to examine electrically conductive materials for surface and near-surface discontinuities, corrosion, wall loss and changes in material condition.

An alternating current energizes a probe coil and produces a changing magnetic field. When the probe is brought near the component, circulating electrical currents are induced in the material. Cracks, thinning, conductivity changes and geometry variations disturb these currents, producing signals that are interpreted by a qualified inspector.

Surface crack detection

Near-surface flaws

Tube wall loss

Corrosion assessment

Conductivity sorting

Heat exchanger tubing

--------- Our Process ---------

A controlled electromagnetic inspection from setup to report

Every job is planned around the material conductivity, component geometry, probe access,
expected defect orientation, inspection frequency and applicable acceptance criteria.

Scope Review

We review the material, geometry, coating condition, probe access, expected discontinuities and applicable acceptance criteria.

Calibration & setup

The instrument is configured using suitable probes, frequencies and reference standards for the material and inspection objective.

Scan & Acquire Signals

The probe is moved systematically across the inspection area or through the tube while electromagnetic responses are recorded.

Evaluation & Report

Relevant signal responses are interpreted, documented and compared with reference indications and applicable acceptance criteria.

--------- Inspection capabilities ---------

Eddy current inspection for conductive components

Our ECT services support manufacturing quality control, heat exchanger and condenser tube inspection,
weld examination, corrosion monitoring, material sorting and failure investigations.

Weld & Surface Inspection

Scan welds, heat-affected zones and accessible surfaces for fatigue cracks and other surface or near-surface discontinuities.

Heat Exchanger Tubes

Inspect non-ferromagnetic tubing for pitting, wall loss, erosion, cracking and support-related indications.

Precision Components

Evaluate machined parts, fastener holes, shafts, wheels and high-value components for cracks or localized material changes.

Conductivity & Material Sorting

Compare conductivity response to support alloy sorting, heat-treatment verification and detection of localized material variation.

In-Service Inspection

Inspect conductive components in service for corrosion, fatigue cracking and deterioration with minimal surface preparation.

Coating & Thickness Applications

Measure non-conductive coating thickness on conductive substrates or evaluate thin material sections where the application permits.

--------- Discontinuities ---------

What eddy current testing can detect

Detection capability depends on material conductivity and permeability, defect depth and orientation, probe selection, frequency, lift-off, geometry and calibration quality.

Surface Cracks

Near-Surface Cracks

Fatigue Cracks

Tube Wall Loss

Pitting Corrosion

Erosion

Weld Discontinuities

Conductivity Changes

Material Mix-Ups

Coating Thickness

--------- Codes & standards ---------

Inspection aligned with your requirements

Testing can be performed to applicable customer procedures, drawings, specifications and recognized industry standards. The final technique is confirmed after reviewing material conductivity, permeability, geometry, probe access, coating condition, reference standards and acceptance criteria.

ISO 17643

Eddy current testing of welds

ASTM E243

Copper-alloy tube examination

ISO 15549

ECT general principles

ASME V

Article 8 requirements

Client Spec.

Project requirements

ASTM E426

Tubular product examination

--------- Industries served ---------

Supporting quality, safety and asset integrity

Oil, Gas & Pipeline

Construction & Infrastructure

Energy & Power

Manufacturing

What our clients say

Frequently asked questions

Answers before you schedule

Share the component type, material, dimensions, coating condition, access, expected defect type and applicable standard so we can recommend the correct eddy current technique.

Does eddy current testing damage the component?

No. Eddy current testing is non-destructive and normally requires little or no surface preparation. The probe does not alter the component during inspection.

What materials can be inspected by eddy current?

ECT requires an electrically conductive material. Common applications include aluminum, copper and copper alloys, stainless steel, nickel alloys, titanium and conductive carbon or alloy steels, subject to the selected technique.

Can testing be completed on-site?

Yes. CMH Metlabs can provide laboratory and field eddy current inspection, subject to component access, surface condition, electrical safety and the availability of suitable probes and reference standards.

What information is needed for a quotation?

Please provide the material, component type, dimensions, tube size where applicable, quantity, inspection area, coating condition, access, location, applicable code and required turnaround time.

How deep can eddy current testing detect?

ECT is most sensitive to surface and near-surface discontinuities. Penetration decreases as test frequency increases and varies with conductivity and magnetic permeability, so deeper volumetric flaws may require ultrasonic or radiographic testing.

--------- Need an inspection? ---------

Detect hidden deterioration before it affects performance

Send us your material details, component drawings, tube specifications, inspection area and applicable acceptance criteria for a practical testing recommendation.

Contact CMH Metlabs

Plan your eddy current inspection

Our team can help confirm material suitability, probe selection, calibration requirements, inspection coverage and reporting needs.

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