Aluminum + Copper mixing results

[Waterlogged]

As the other poster stated, I would love to know what fluid was being used. I have a couple Koolance Vid 280 full cover blocks (they have anodized aluminum tops) in my loop, and I have always used fluid with anti corrosives. I just pulled the loop apart to put in some bitspower 90's and 45's and decided to pull apart my full cover blocks and they look pristine, as does everything else in my loop. This is over a year of running on either feser fluid, and the last 6 months on distilled with pentosin.

I like the Vid 280 blocks, but the anodized aluminum tops makes me worry when I see a thread like this. I wonder how hard it would be to make a delrin or acrylic top for my blocks?

The tops on those blocks are nickel plated aluminum not anodized, big difference.

I might have this the wrong way around, but when you mix Alu & Copper, isn't it the Alu that gets eaten, not the copper?

I.e., once you've cleaned the depostits off of copper, it's basically OK, but the Alu part is going to be badly pitted and "half missing"

I welcome corrections from people with more of a clue!

J

Unless you re-machine the blocks, there will still be deposits of aluminum buried in the copper.