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topic 5241

Galvanic Corrosion Potential, Al and Nitinol


Hello, I am trying to determine the galvanic corrosion potential between 7075-T6 Aluminum and Nitinol (45wt% Ti, 55wt% Ni). Does anyone have a suggestion of where such information may be located or how to determine the potential?


Heather Couvillon
- Indian Head, Maryland, US



The question you are asking is more complicated than you may think, and it depends on the environment, specific geometry of the connection, etc.

If your concern is whether nitinol is cathodic to aluminum, the answer is yes. Can this create galvanic corrosion problems on aluminum? Once again the answer is yes.

FYI I am spending weeks trying to measure galvanic potentials reproducibly, and the numbers are all over the place. (Sorry, your alloys aren't under consideration.)

Bob Heidersbach
- Cape Canaveral, Florida

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