Anti-seize for stainless bolts into aluminum threads

[Astro14]

About 99% of residential and commercial service drops are aluminum wire to copper wire with an aluminum swage installed dry with a quick wrap of electrical tape over it all.
It's really not.

But we aren’t talking about electrical conductors, we are talking about stainless bolts in aluminum in service.

That’s what you were asking about, wasn’t it?

And it is a well known property of both aluminum and stainless steel that they form a layer of oxide that prevents further corrosion and that that layer of oxide is also nonconductive. It is also well known that they have different potential and galvanic corrosion occurs. I showed an example of how that works.

You’re replying to a statement in which I said that the metal (aluminum or stainless) is a good conductor.

We agree on that and that’s basic. Swaging the ends, and a wrap of tape keeps the oxidation from happening, and the fact that it’s copper and aluminum together, is a very different situation than stainless steel and aluminum.

So, I don’t see how it applies to your original question.

Because when you put those two metals next to each other and expose them to the elements over time, especially when salt is present, there is a galvanic reaction. We are talking about stainless steel and aluminum, aren’t we?.

 

[oil pan 4]

But we aren’t talking about electrical conductors, we are talking about stainless bolts in aluminum in service.

That’s what you were asking about, wasn’t it?

And it is a well known property of both aluminum and stainless steel that they form a layer of oxide that prevents further corrosion and that that layer of oxide is also nonconductive. It is also well known that they have different potential and galvanic corrosion occurs. I showed an example of how that works.

You’re replying to a statement in which I said that the metal (aluminum or stainless) is a good conductor.

We agree on that and that’s basic. Swaging the ends, and a wrap of tape keeps the oxidation from happening, and the fact that it’s copper and aluminum together, is a very different situation than stainless steel and aluminum.

So, I don’t see how it applies to your original question.

Because when you put those two metals next to each other and expose them to the elements over time, especially when salt is present, there is a galvanic reaction. We are talking about stainless steel and aluminum, aren’t we?.

You originally claimed in post 32 that aluminum wasn't a very good conductor.
A few wraps of electrical tape does nothing to keep the water out.
Talking about stainless steel, aluminum and the possibly of cooper being present.
Long term observation shows nothing really happening to the stainless steel in the presence of aluminum and/or cooper.

 

[Astro14]

You originally claimed in post 32 that aluminum wasn't a very good conductor.
A few wraps of electrical tape does nothing to keep the water out.
Talking about stainless steel, aluminum and the possibly of cooper being present.
Long term observation shows nothing really happening to the stainless steel in the presence of aluminum and/or cooper.

That is not what I said. I was very clear.

It is a good conductor. I said that.

Or, more accurately, they conduct very well, but they quickly develop a layer of oxide that acts as an insulator.

And I explained the oxide.

Go back to post 5 - clear galvanic corrosion. Of the aluminum and the regular steel. The aluminum subframe had large areas of deep pitting, erosion and the corrosion that filled the stainless steel spacers with aluminum oxide while the steel bolts were severely corroded.