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Copper block paired with aluminium rad

Copper block paired with aluminium rad

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Sheik1soul
Senior Member
511
02-06-2026, 06:46 PM
#1
Hello. The issue revolves around whether it's safe to use an aluminium radiator with a nickel-plated copper block, given concerns about galvanic corrosion. Many sources warn against mixing metals, but since most AIOs use a copper block and an aluminium radiator, I’m wondering if my setup is still viable for a short period before replacing the radiator. My coolant is highly concentrated red blood serum with added corrosion inhibitors, so I’m curious—will it hold up for about a month or two before I upgrade to a full copper unit? If the answer remains negative, why would manufacturers risk such a combination in a sealed system?
S
Sheik1soul
02-06-2026, 06:46 PM #1

Hello. The issue revolves around whether it's safe to use an aluminium radiator with a nickel-plated copper block, given concerns about galvanic corrosion. Many sources warn against mixing metals, but since most AIOs use a copper block and an aluminium radiator, I’m wondering if my setup is still viable for a short period before replacing the radiator. My coolant is highly concentrated red blood serum with added corrosion inhibitors, so I’m curious—will it hold up for about a month or two before I upgrade to a full copper unit? If the answer remains negative, why would manufacturers risk such a combination in a sealed system?

T
TheTrueGeek
Member
217
02-07-2026, 12:04 AM
#2
Chromed copper is acceptable, but bare copper might lead to issues.
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TheTrueGeek
02-07-2026, 12:04 AM #2

Chromed copper is acceptable, but bare copper might lead to issues.

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Wowrune
Junior Member
40
02-07-2026, 01:05 AM
#3
You have options for brass/copper rads around $50, but it’s unclear why you’d choose the cheapest aluminum design or the narrow tubing typical of most AIOs. It might be better to opt for larger diameter tubing with a reliable pump instead. The internal surface of the block isn’t necessarily plated, though it could be that the entire copper is coated—this would need confirmation from the block itself. Also, ensure you use anti-corrosive coolant, as electromagnetic fields in your PC case and pump impeller can worsen corrosion. It looks like you might be cutting corners to accelerate your build instead of selecting quality parts?
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Wowrune
02-07-2026, 01:05 AM #3

You have options for brass/copper rads around $50, but it’s unclear why you’d choose the cheapest aluminum design or the narrow tubing typical of most AIOs. It might be better to opt for larger diameter tubing with a reliable pump instead. The internal surface of the block isn’t necessarily plated, though it could be that the entire copper is coated—this would need confirmation from the block itself. Also, ensure you use anti-corrosive coolant, as electromagnetic fields in your PC case and pump impeller can worsen corrosion. It looks like you might be cutting corners to accelerate your build instead of selecting quality parts?

K
kulan3
Member
174
02-07-2026, 09:35 AM
#4
The entire cooling plate is coated, and it features a transparent acrylic surface, allowing visibility of the fins. Yes, I intend to upgrade in the future, as discussed. Not using the narrow tubing that came with the AIO; I'm relying solely on the radiator. I've worked with watercooling before, but it was entirely copper-based. Also, the cooling solution includes corrosion inhibitors mixed in.
K
kulan3
02-07-2026, 09:35 AM #4

The entire cooling plate is coated, and it features a transparent acrylic surface, allowing visibility of the fins. Yes, I intend to upgrade in the future, as discussed. Not using the narrow tubing that came with the AIO; I'm relying solely on the radiator. I've worked with watercooling before, but it was entirely copper-based. Also, the cooling solution includes corrosion inhibitors mixed in.