Similar to aluminum, lighter weight magnesium metal parts are often machined to create the required shapes and features (see picture above). The machining process leaves burrs, sharp edges and (most noticeably) machining lines and swirls. These imperfections in the surface need to be removed prior to further processing of the part.
As similar to aluminum and other reactive metals, magnesium is subject to oxidation. When vibratory tumbling the part, using the proper chemistry is important. This part was deburred and made smooth using a Ceramic Angle Cut Cylinder tumbling media and a solution of Kramco 1030 Mild Acid Compound (see 2nd picture above).
Ceramic media was used to keep the cycle time to a minimum with maximum surface finishing. The Angle Cut Cylinders removed the machining marks all the way into the interior corners of the machined areas as well as provided an even deburr and edge rounding across the entire part. The slightly acidic pH of the Kramco 1030 prevented the part from oxidizing during the tumbling process and resulted in a clean, white-metal finish.
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