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





-----

Bath control for chemical milling of Ti-3Al-2,5V





June 2, 2010

Dear experts,

I am working in a company that produce seamless tubes, and as a new product we are trying to produce Ti-3Al-2,5V tubes from 6 to 25 mm of diameter. As a part of the process, we need milling chemically with a solution of HNO3/HF the inner and the outer surface of the tubes. We have limitations to invest money in sophisticates devices to control the bath so we have to use some traditional method to control it.
Now the questions:

Which are the parameters to control (concentrations, acidity, titanium in solution, temperature..)
Which is the best way to control them (without expensive equipment)
It is possible the control of the roughness changing some parameters

Thank you in advance and any other suggestion will be welcome

Diego Delfino
materials engineer - Buenos Aires, Argentina



June 3, 2010

Diego-
You will want to titrate for the nitric acid content, but rather than analysing for the HF it is better to make adds as necessary to maintain a consistent etch rate. Temperature has a significant effect on etch rate, so you will want to keep the temperature constant by either heating or cooling the bath to a set temperature instead of relying on your ambient conditions.

If you search on this website, you will discover lots of other information from previous posts. Good luck.

Jon Barrows
Jon Barrows, MSF, EHSSC
GOAD Company
supporting advertiser
Independence, Missouri
goadbanner4


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

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