Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Finishing of old titanium

2007

Dear Sir,
We are manufacturers of titanium baskets/titanium heating and cooling coils.
We buy titanium sheets in the form of scrap and we need to clean them in order to get the sparking finish.

Pawan Chadha
hi-tech (India) - Delhi, India

Using scrap metal bothers me, but it may work for you. Typical cleaning would be a soak in a hot caustic solution (proprietary ones will work better) and then a dip/soak in a mixture of nitric acid and hydrofluoric acid in a ratio or 10 parts nitric to one part hydrofluoric. The nitric can be from 10% to 30%. Start on the low end and make adds to keep the speed in a useable range.
Rinse very very well after each step. A final dip in hot DI water helps to reduce spotting.

James Watts
- Navarre, Florida
2007

(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: