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Eddy Current Testing

Eddy Current testing is one of the most under utilized and most useful of all the NDE methods.

Some from an electrical engineering background dismiss Eddy Current due to heat build up and energy loss. Nondestructive testing and the electronic age have allowed us to measure that very slight deflection in the wave and gain usable information.

Eddy Current is very useful in the aviation industry, building/structural and HVAC systems, and heat exchangers in almost every industry. With todays alloys, ceramics and aluminum, Magnetic Particle inspection had to have a replacement. We heard about being able to inspect rivets on aircraft wings and finding a crack in secondary layers (totally unseen any other way, except dismantling). The down side was Eddy Current testing didn't work on ferromagnetic parts. There has been a lot of research into carbon steel tubing used to build heat exchangers.

With increasing costs, environmental concerns, and the need for more predictive maintenance, something had to be done. Ultron began working with the knowledge available at the time to help our mining clientele. Two and one half years later, after working with all variables associated with Eddy Current, we brought Eddy Current out as a crude inspection service. Ultron continued learning and tweaking the equipment to gather the most information we could to move to the next level.

Fifteen years later Ultron has the technology and the personnel to use this refined service to benefit the world wide market. All probes are manufactured for Ultron under our name. Your local nondestructive testing firm does not have access to or knowledge of these specialized probes.

Plus side of Eddy Current Testing

Minimizes manpower requirements due to cleaning (economics does not allow for extra personnel being available).

Reduces the need for complete dismantling of the equipment being tested.

Hazardous material removal is reduced due to not having to clean the entire component.

Re-lubrication of the complete component is not a requirement upon completion of the inspection.

Limitations

Inspection is for the filet radius, tooth root, and side faces of the gear. The inspection method does not target the pitch line or upper flank areas. Loss of a tooth tip, or portion of one tooth, is not a gear failure unless the broken section enters the mesh, or the damaged area is more than 50% of the face width. Ultron can detect pitch line cracks if they propogate to the side face.

Ultron has divided Eddy Current testing into two application pages (mining and rotary processing)

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