Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Surface contaminant and electropolish methods for biomaterials





2003

I tried to get some smooth surface for metallic biomaterials, e.g. 316LSS, Nitinol. I polished these metal by mechanical polishing using 0.05 µm Alumina paste. But these are always some contaminants such as small particles. I ultrasonically cleaned these surface in soap, acetone Acetone [affil link] and DI water bath but it seemed not work well. Any suggestions on getting rid of these particles will be welcome. By the way, anyone know how to polishing these biomaterials by electrochemical methods. I saw some suggestions on nitinol using electropolishing but lack of details.

Thanks,

Bill Bai
- Syracuse, New York



2003

Electropolishing removes embedded contaminants and leaves a microscopically smooth, corrosion resistant surface. However, it requires equipment, chemicals, wastewater treatment, permits, expertise, etc. Go to the www.finishing.com Home page and Search for electropolish. One respondent suggests sending parts to a commercial electropolisher (try Jobshops below) if you manufacture fewer than 10,000 parts per year. Also, a jobshop should be familiar with standards such as ASTM B912 [affil link]-02 Passivation of Stainless Steels Using Electropolishing and perhaps ASTM F86 [affil link] Surface Preparation and Marking of Metallic Surgical Implants. Not sure what you mean by "metallic biomaterials," but the suitability of the alloy depends upon the application. I do know that Nitinol (N01555) is used for stents. Carpenter Technology www.carpentertechnology.com has a free, useful booklet Biodur® and Other Specialty Alloys for Medical Applications. Also, if implants are involved, do a search for surgical implant at www.astm.org.

Ken Vlach [deceased]
- Goleta, California

contributor of the year Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.



none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages



(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA