Curious if anyone has encountered galvanic corrosion from pairing aluminum heat exchangers with copper, brass or steel components in the hydronic loops?
How’d you solve this?
I install dielectric unions on my looped systems to help prevent this. For example, I would install the unions between a stainless / aluminum heat exchanger and the copper piping used to make the runs. I don’t really have any stories but have seen my fair share of hot water storage tanks with paper thin walls.
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it can be really bad for liquid quality and also for the miners!
i would not suggest use different materials.
even copper heat exchanger is not good. we just use stainless steel which is much better for longevity.
it depends how long the system should run and how often you wanna maintenance it. but since labour is expensive our goal is to keep it running for years without replacing the full liquid, heat exchanger or so on.
Note: when you combine copper and aluminium with anti corrosion fluid the water (pH) will tilt which is more aggressive to metals –> more rust, failing components and so on.
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