Letter 18003

The Effects of Magnetic Particles on Alloy Steel Fatigue Test Pieces

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Can Magnetic Particles have an effect on the fatigue properties of alloy steel? Our fatigue tests prior to Magnetic Particle are 200,000 cycles. After Magnetic Particle and alkaline clean/degrease the fatigue drops to about 80,000 cycles. We looked under a black light and there are still some residual mag particles on the surface of the test pieces. I guess the obvious question is to clean it completely and then re-test. Acetone [link is to product info at Rockler] seems to remove all of the particles but we have not tested samples after such cleaning. What is a good cleaning method for removing mag oil and particles prior to plating?

Don Huffman
- Torrance, CA, USA


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