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Magnetic Particles

 

Magnetic particles are fine iron oxide particles with a high permeability (easily magnetized) and low retentivity (ability to stay magnetized). Magnetic particles typically range in size between 0.125 to 60 microns. Three methods are typically applied: dry non-fluorescent, wet non-fluorescent, and wet fluorescent. Dry particles are chemically dyed gray, red, black, and yellow to provide contrast against the background of the test surface. A powder applicator is used such as a squeeze bulb or spray gun. Wet suspension particles are suspended in an oil-based or water-based liquid vehicle or carrier. In water-based suspensions, additional conditioners are required such as wetting agents and corrosion inhibitors.

Products & Services
Burnishing Tools
Burnishing tools are used to impart a gloss or fine surface finish, often in processes that involve the cold working of metal surfaces.
Vibratory Finishers and Mass Finishing Machines
Mass finishing machines use loose abrasives or tumbling media combined with cleaning or polishing compounds to bulk-finish parts.
Metal Media and Abrasives
Metal media and abrasives include metal shot or balls, cut wire, crushed metal grit, and shaped media for applications such as blasting, ball burnishing, peening, mass finishing (vibratory or tumbling), and deburring. Products are also used in bonded wheels and coated abrasives.
Peening Machines
Peening machines deform and strengthen a metal surface by hammering the surface with small beads, shot peen balls or peening media.
Metal Billets, Slabs, and Blooms
Metal billets, metal slabs, and metal blooms are large, massive blocks or rounds that are produced from a primary metal or during a recycling process. They are used as raw materials or feedstock in extrusion, forging, rolling, and other metal-processing operations.
Product Announcements
General Magnaplate Corporation - Hi-T-Lube Coating Sets World Record
Recognized by the Guinness Book of Records as the solid with the lowest COF in the world, this space-age, dry-film lubricant solves critical problems of wear, galling and fretting on steel, stainless... (read more)
Yarde Metals, Inc. - Marine Alloys- When Speed/Accuracy Are Essential
Processing and distributing marine grade alloys for the commercial, defence, pleasure boat, yacht and ship building industries. (read more)
Topics of Interest

Burnishing, deburring and tumbling are specific applications that fall under the broad term mass finishing. Mass finishing refers to a varied group of surface conditioning processes used in...

Suppliers Make an Impression on Medical Devices Printing and surface-treatment providers offer a range of device-finishing services In many cases, medical devices are not quite finished when the...

Surface enhancement methods induce a layer of residual compressive stress to improve fatigue life. Shot peening is inexpensive and widely used, but the associated cold work accelerates relaxation of...

Overview Most of this book has discussed using cutting tools to produce countersinks. Chapter 12 discussed pressworking techniques, which are much faster than metal cutting. The following list...

Low plasticity burnishing (LPB) is a surface enhancement method that produces a deep layer of compressive residual stress with minimal cold working and an improved surface finish. Extensive fatigue...