Iron Contamination in Non-Ferrous Media

Author:  Jack Champaigne | President | Electronics Inc.
Source:  The Shot Peener magazine, Vol 34, Issue 2, Spring 2020
Doc ID:  2020018
Year of Publication:  2020
Abstract:  
Many blast cleaning and shot peening processes benefit from non-ferrous media (ceramic bead and glass bead) because the media eliminates contamination such as rust. It is often assumed that the media is free of all iron contamination, either new or in use. SAE specifications J1173, J1830, AMS2431/7 and AMS 2431/6 state that the magnetic particle shall not exceed 0.1% of the original sample, by weight. Descriptions of an inspection method are included in each of these documents as follows.