Different materials for bolts and nuts regarding galvanic corrosion?
Different materials for bolts and nuts regarding galvanic corrosion?
(OP)
Hi everyone :)
For the project I am working on, I am using a Titanium grade 5 threaded rod with S/S 304 plates and nuts.
I am concerned about galvanic corrosion. Both Titanium and S/S 304 are safe for the application environment(steam, salt water, etc) but I am not sure how they are going to work together.
Thank you for your time reading my post and I would appreciate any comment.
Thanks!
For the project I am working on, I am using a Titanium grade 5 threaded rod with S/S 304 plates and nuts.
I am concerned about galvanic corrosion. Both Titanium and S/S 304 are safe for the application environment(steam, salt water, etc) but I am not sure how they are going to work together.
Thank you for your time reading my post and I would appreciate any comment.
Thanks!





RE: Different materials for bolts and nuts regarding galvanic corrosion?
http://esmat.esa.int/Publications/Published_papers...
Keep in mind that Type 304 stainless has limited resistance to pitting and crevice corrosion in seawater, especially if the temperature is > 25 C. Coupling it to Ti definitely will not improve things.
RE: Different materials for bolts and nuts regarding galvanic corrosion?
According to the reference the difference in Titanium and S/S304 is only 0.03V.
I suppose I don't have to worry about galvanic corrosion.
I will look into crevice corrosion in seawater for SS304.
RE: Different materials for bolts and nuts regarding galvanic corrosion?
Probably not a good combination.
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Plymouth Tube
RE: Different materials for bolts and nuts regarding galvanic corrosion?
RE: Different materials for bolts and nuts regarding galvanic corrosion?
You won't just corrode the nuts you will also hydride the Ti bolts. At first this just makes them stronger but eventually you will loose a lot of the ductility.
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Plymouth Tube
RE: Different materials for bolts and nuts regarding galvanic corrosion?
He said the product won't be used under the environment where salt water is present.
But other senior engineer is going to take a look at the paper to make sure whats going on.
Thank you for the comments!