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topic 50346

Passivating Heat Treated Titanium

October 21, 2008


I am passivating heat treated Titanium and would like to know if there is an easier way to break the heat coating prior to alkaline cleaning and Acid passivation. I am currently breaking the surface with scotch-brite pads, but this is very labor intensive. If I don't prep the parts with the scotch-brite, it takes a long time for the acid to react with the oxide layer. Any suggestions would be appreciated.

Thank you in advance.

Michael Hall
Metal Finishing - Ottawa, Ontario, Canada

October 22, 2008

Change your heat treat process to a vacuum furnace or a reducing atmosphere and you will not get the oxide coating.
Abrasive blasting is a lot quicker and probably cheaper than scotch brite after the initial cost.

James Watts
- Navarre, Florida

October 30, 2008

Mr. Watts,

We tried as you suggested with the abrasive blasting and the passivation process is working quite nicely now. It is a lot quicker and with a more uniform finish.

Thank you !

Michael Hall
- Ottawa, Ontario, Canada

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