-- The Home Page of the Finishing Industry

on this site
current topics

60,000 Q&A topics -- Education, Aloha, & Fun

topic 17007

Pretreatment and plating Ti6AL4V


I'd like to have some help to discuss my suggestion for plating nickel on titanium Ti6Al4V.

1. Blasting with dry 120 grit aluminium oxide or with wet 500 grit aluminium sludge.
2. Rinse.
3. Electro cleaning for 1 minutes.
4. Rinse in citric water (It's to complex binder the TiO2.)
5. Etch in HNO3-HF for 1 minute. (It's for the Alpha phase)
6. Rinse in citric water.
7. Etch in HCl-NaF-NaCl for 1 minute. (It's for the Beta phase and also to activate the Vanadium which will be passivated in HNO3-HF.
8. Rinse in citric water.
9. Etch in Na2Cr2O7-HF for 5 minutes.(It's for the Alpha phase and also to clean the area from aluminium oxide from step No 7
10. Rinse in citric water.
11. Activation in Citric-HF for 1 minutes. The area should be light grey like a stainless steel surface at this step.
12. Rinse in citric water.
13. Nickel strike with a high CD for a few sec, and after that normal CD. (It's to get a Titanium hydride at the surface.
14. Nickel plate.
15. Bake at 480 °C.

All these pretreatment steps and plating are done in an argon air atmosphere. This pretreatment should give an adhesion about 150-300 Mpa. I hope people who enjoy this site here at will discuss this operation so it could be better.

Best Regards,

anders sundman
Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika, Sweden


Have you attempted this yourself with success? I like the citric rinses; makes a lot of sense. j

Jon Quirt
- Fridley, Minnesota


Yes this pretreatment step work for me. The adhesion I have got is from 58-80 Mpa. Next step for me is to se if the adhesion will be better if the bake is 4 hour instead for 2 hour. The citric acid is to complex binding the titanium oxide.

Anders S

anders sundman
Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika, Sweden

adv.   accurate anodizing banner   

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental Compliance

©1995-2020, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.