Ti 6Al-4V on 6061-T6

[dthom0425]

Hi all,

I am in an aerospace application (sorry, can't share specifics) - the product I have will be cycling through hot and cold/various humidity over the course of its life.

I'm curious if anyone has any experience with grade 5 Ti in conjunction with class 3 chem film on Aluminum. I see in MIL-STD-889 they appear to be incompatible, though I'm hearing (from potentially unreliable sources)that these dissimilar metals won't create a galvanic couple.

The surface area of the aluminum is much greater than that of the Ti.

Any help would be greatly appreciated.

Thank you

 

[Bibek29]

Titanium to Aluminum corrosion will happen. Aluminum will get corroded. As surface area of Aluminum is more, the situation is time dependent. If application does not allow any risk taking, please avoid this galvanic couple.
Regards,
Bibek.