Magnetic Particle Inspection (MPI)
Magnetic Particle Inspection (MPI) reveals surface and slightly sub-surface cracks in ferromagnetic steel components.
Overview
Magnetic Particle Inspection (MPI) magnetises a ferromagnetic component and applies fine iron particles; where a crack disrupts the magnetic field, the particles gather and make the defect visible. It is a rapid, reliable method for detecting surface-breaking and slightly sub-surface cracks in welds and steel components.
NDT Australia performs MPI in the field and in workshops, using both wet fluorescent and dry powder techniques depending on the component and lighting conditions. It is a mainstay of weld inspection and structural steel assessment.
Applications
Magnetic Particle Inspection is applied across a wide range of assets and industries, including:
- Weld crack detection on structural steel and fabrications
- Inspection of castings, forgings and machined components
- Fatigue crack detection on lifting equipment
- Surface defect verification after grinding or repair
Standards & Compliance
Our inspections are performed and reported to the applicable Australian and international standards:
- AS 1171 — Magnetic particle testing of ferromagnetic products
- ISO 9934 — Magnetic particle testing general principles
Why Choose NDT Australia
- Fast, visual and low-cost surface crack detection
- Works on complex shapes and weld profiles
- Portable — suitable for site and workshop
- Immediate results with clear defect indications
Frequently Asked Questions
Related Services
NDT Australia provides these services nationwide with certified, mobile inspectors and clear, compliant reporting.