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How to prevent galvanic corrosion(alu+Cu)

post #1 of 14
Thread Starter 
so I was given a copper waterblock and an aluminum rad, I know about corrosion, but whats the BEST way to reduce/stop it? A bit of vinegar or something else?
edit: how does corsair do it? I modded an h50 so not sure, they just use water+glycerol, also i will use this to cool an i3 2105, with the radiator outside case, fan next to it(just for info)
Edited by mordocai rp - 2/28/12 at 5:35pm
post #2 of 14
Quote:
Originally Posted by mordocai rp View Post

so I was given a copper waterblock and an aluminum rad, I know about corrosion, but whats the BEST way to reduce/stop it? A bit of vinegar or something else?

Do not use vingear in your loop it will corode the copper quickly!
only thing I can think of is radiator fluid, but it will hurt performance because its has less heat dissipation than h2o. I suggest you get a typical watercooling rad made out of brass/copper etc.
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post #3 of 14
Don't use the two together tongue.gif

You could try antifreeze. 3 parts water to one part antifreeze or so.
post #4 of 14
Even liquid with a corrosion inhibitor won't last long. You'll likely be changing coolant very often. It's best not to use them together at all.

The most damage would be to the aluminum radiator, not so much the block (which is unfortunate, because you can't see the damage inside the rad). Eventually, you'll probably end up with pinhole leaks in your rad.

I'd recommend getting a copper radiator or a nickel plated block..... or a lot of anti-corrosive liquid.

Liquid usually turns into a milky color when corrosion is occurring in your loop.
post #5 of 14
50/50 anitfreeze/water mix. So simple but smelling car coolant in the house isn't so nice.


I laugh when people say these two wont last long. There are vehicles on the road that are decades old with the OEM cooling systems that are still working.
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post #6 of 14
Quote:
Originally Posted by Rangerscott View Post

50/50 anitfreeze/water mix. So simple but smelling car coolant in the house isn't so nice.
I laugh when people say these two wont last long. There are vehicles on the road that are decades old with the OEM cooling systems that are still working.

don't be so harsh, they assume pc watercooling is more fragile than cars, but overall its the same thing/concept with mixing metal in the same loop. As I have stated the antifreeze heat dissipation will not be as effiecent.
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post #7 of 14
Never tried, but I would be looking at both a coolant with corrosion blockers and a sacrificial anode making metal contact with the aluminum. A piece of zinc or other metal more electrically active on the galvanic index should do. I have heard the anode option was common back in the early days of water cooling when copper/aluminum was more common. It would be an interesting experiment..smile.gif

You can't stop corrosion but you can slow it way down. Also change your coolant out more frequently to reduce it's electrolite like properties and inspecting regularly can keep you informed of pending problems.
Edited by Martinm210 - 2/28/12 at 5:21pm
    
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post #8 of 14
Thread Starter 
how does corsair do it? I modded an h50 so not sure, they just use water+glycerol
post #9 of 14
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post #10 of 14
Quote:
Originally Posted by sawjai526 View Post

don't be so harsh, they assume pc watercooling is more fragile than cars, but overall its the same thing/concept with mixing metal in the same loop. As I have stated the antifreeze heat dissipation will not be as effiecent.

Sometimes you gotta give out tough love. Metals are metals no matter what they're in.
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