Using blind rivets under the waterline on aluminum boat in saltwater, are dissimilar metals a concern?

[Batperson]

Hello,
What is the best material for rivets under the waterline in saltwater? Do I need to stick with only aluminum (body and mandrel) or can I use aluminum body and steel mandrel or even a pure stainless rivet? Will dissimilar metals cause weird corrosion issues in the saltwater? Thanks I’m advance

 

[airshot]

In salt water yes...in fresh water only, SS and aluminum are fine

 

[Scott Danforth]

aluminum, steel and salt water make a battery

 

[Bondo]

Ayuh,.... They make all aluminum Closed end pop rivets, which work perfectly, 'n don't leak,.....