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-----Platinum plating stainless steel contact for implantable medical device
I am designing an implantable medical device and am interested in using a composite material of stainless steel for its spring properties, plated or coated with platinum for its electrical properties. Most importantly, I need to ensure the biocompatibility of this joined material and whether or not it will corrode over time. I also need to determine the specific grade of s.s. as well as the Pt. thickness and coating process. Any information on this topic will be greatly appreciated.
Melissa Rosenproduct designer - Cambridge, Massachusetts
January 28, 2008
Melissa,
As you may already know s/s and platinum "composite material" is widely used in the medical industry. If a platinum plated thickness of 100-200 microinches is employed, corrosion will not be an issue. There is a way to get good adhesion without using a woods nickel strike on the s/s by using a platinum chloride bath for a strike, after proper cleaning and de-scaling of course. You can then build a thicker deposit with a normal Pt bath. I am not sure however on the choice of s/s that should be used because of the spring you speak of.
Process Engineer - Syracuse, New York
February 1, 2008
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