The Gun Counter

I have some questions about galvanic corrosion. Specifically when created by contact of dissimilar metals.

I will likely be mating a tube of anodized aluminum to a bit of steel via threads. I realize that sets me up for corrosion which will permanently lock the two items together.

Would something like KG's K-phos on the steel greatly reduce / fix the issue?
. .. how about if I used the K-phos treatment then gunkote 2400 series?

next question

Assuming the above fails, what is the galvanic potential between high carbon (4140) and stainless 304 or 316 as examples. Small enough to not be much of an issue?

The basic item is most likely 4140 so assuming the aluminum and stainless ideas fail, just go with 4140 for my addition and coat it?

S/S and aluminum will galvanically corrode the aluminum, esp. in a salt environment. S/S and carbon steel will too, but to a much lesser extent. Dielectric grease, Never Sieze, etc. all help, but are not 100%

Might a copper or nickel anti-sieze compound on the threads help?

Find appropriate size cadmium plated hardware?

Just use some copper grease on the threads as Darrel suggests, it'll be OK

sounds good

We use Loctite C5A copper anti-sieze compound at work, great stuff.

+1 or whatever number we are on for the copper anti-seize. It works great. I use it especially for applications with high corrosion and/or high temperature differential. Surprisingly doesn't take a lot to make it OK.

It also helps if this assembly you speak of could be disassembled periodically for cleaning and re-application of the anti seize if it is particularly susceptible to corrosion.

This is what I use.