Cleaning and finishing procedures for bone screws

A. Hi Ricardo. Here in the U.S., this would be subject to all kinds of standards, including U.L. and ASTM. The electropolishing step per se is not intended to remove oil; rather, a cleaning step is universally applied before electropolishing. Good luck.

A. My answer to you does not address the safety or medical standards industry; however, as a very cheap, inexpensive and simple deburring process, you might want to try part on part mass finishing your parts without any liquid at all. Keep an eye on your time cycle and you will still have to clean your parts after processing.

A. I suggest electropolishing, since only electropolishing can remove small burrs and open smeared hidden areas where bacteria can grow. Small stainless steel screws can be electropolished in basket in Universal electrolyte. The Tantalum pieces can also be electropolished. You will save time on individual inspection and cleaning.

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A. Anna usually has good advice, but since you specifically asked about mass finishing I will give you more info. Mass finishing equipment only sets up a mechanical energy force that transmits energy to the mass within the work chamber. What you put in with the parts determines what comes out in the way of a surface finish. The more abrasive the media the rougher the part and the shorter the time cycle. In your case, I suggested part on part because of the small size of your parts and the time to separate the parts from the media. If there is enough weight/mass or batch of parts the faster it will achieve the results. Weight and pressure is key.