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A highly-sensitive oil-based magnetic particle aerosol for nonfluorescent (visible) wet method magnetic particle testing to locate fine and medium discontinuities on finished parts. 7HF provides clear, strong indications due to the heavy buildup of the highly magnetic particles.
The convenient aerosol packaging is ideal for field testing, spot inspections and places where bulk processing is impractical, and the wide spray pattern makes it easy to cover large areas for faster processing during remote inspections of tubing, piping and large structures.
7HF is often used with WCP-2 white contrast paint to improve contrast and inspection sensitivity.
Maximise indication detection
Convenient to use
Wide application versatility
Inspect a wide range of components without fear of corrosion or specification non-conformance
NDT TypeVisible Magnetic Particle Testing
Particle Suspension VehicleCarrier II (Petroleum Distillate)
Required EquipmentMagnetizing device
Ideal ApplicationDetecting fine and medium discontinuities, Difficult to reach areas, Field testing, In-service inspections, Light surfaces, Machined parts, Spot inspections
Defect ExamplesFatigue cracks, Grinding cracks, Inclusions, Laps, Quenching cracks, Seams, Shrink cracks, Tears, Welding defects
StandardsAMS 2641, AMS 3041, AMS 3043, ASME BPVC, ASTM E1444/E1444M, ASTM E709, ISO 9934-2, MIL-STD-2132
Carrier II petroleum-based suspension vehicle for wet method MPI
WB-27 water-based magnetic particle suspension for visible wet method MPI.
WCP-2 white contrast paint for high contrast backgrounds to improve visible magnetic particle inspections
SKC-S cleaner and remover for pre-cleaning before testing and for removing excess surface penetrant.
Centrifuge tubes to measure settling volume concentration
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