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topic 5354

Cleaning of Titanium Pipes


(2000)

I was wondering if anyone could give me any Idea on the cleaning of a Titanium pipe. I have used Ammonium Bifluoride before, but it is just to harsh. I was wondering if the was a non-fluoride type of cleaning.

Jon Kuehler
- San Diego, California, USA


(2000)

It would help if we had some idea of the size of the pipe, are you cleaning the outside or OD and ID. What do you mean by cleaning? Removal of dirt or removal of the oxide layer.

In the aerospace industry, we used a soak in a hot caustic bath, typically of a deruster makeup and then rinsed and went into a nitric acid-Hydrofluoric acid mixture. Bifluoride can be substituted for the HF for a much safer chemical. If it started with a reasonable surface, this will bring it out as bright as a new dime. Bifluoride by itself is a poor solution.

James Watts
- Navarre, Florida


(2000)

Are you trying to remove the native oxide with the ammonium bifluoride? If not, what are you trying to do here?

If you are prepping for anodising & need to remove the surface oxide, there are only a couple chemicals aggressive enough for the task, and the fluorides are about all of them. If you are prepping for welding or for cosmetic reasons, then you may wish to switch to commercial aluminum cleaning solutions.

Sorry, but not really enough information was provided in your question to be more specific.

Dale Woika
Surface Conversion Sciences Corporation - Bellefonte, Pennsylvania

 



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