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General Liquid/Water Cooling Discussion For discussion about Full Cooling System kits, or general cooling topics. Keep specific cooling items like pumps, radiators, etc... in their specific forums.

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Unread 01-08-2003, 07:29 PM   #1
ChronoS
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cooper and aluminium - water and antifreeze

i have an aluminiun heatercore and soon an cooper block, so i have to use water+antifreeze (i dont found water wetter), witch % of antifreeze do i have to use?

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Unread 01-08-2003, 08:25 PM   #2
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if i remember correctly if you mix those two metals you in effect create a battery and something goes very bad. Anyone verify this?
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Unread 01-08-2003, 08:42 PM   #3
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Verified.

Check out this article.

For the proportion, see this article.
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Unread 01-08-2003, 09:51 PM   #4
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but what about the coolance exos?? it mix an aluminium heatercore with a cooper block
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Unread 01-09-2003, 12:44 AM   #5
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If you're going to use dissimilar metals, you need to use an additive designed to prevent galvanic corrosion. Most water treatments for cooling systems will have this.

Adding antifreeze to a normal cooling system will only harm performance. It will keep down the algae (most types, anyhow), but there are better ways to do that.

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Unread 01-10-2003, 03:00 PM   #6
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Default sacrificial metals.

I understand that the sacrificial metal is good instead of being a chemist on your liquids and degrading the heat transfer properties of your fluid. If I used zinc or magnesium.. or both. Would this be bad?

Total metals:
Brass (barbs)
anodized aluminium (block)
Copper (radiator tubing or block)
Zinc AND
Magnesium

Does anyone see any benifit to using these 2 sacrificial metals if you can in your system. I am trying to reduce the additives to my water. I just dont want to end up making something thats explosive.
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Unread 01-10-2003, 03:22 PM   #7
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This chart might help.

You won't find anodized aluminium in there, since it doesn't apply.

Using a sacrificial anode is fine, but I would worry about the residue that it would leave in the coolant. See what Dan at dansdata.com encountered.

Given the above, I thought it might be worth looking into isolating the sacrificial anode in an area of the loop that sees no flow whatsoever, while still maintaining an "electrical" connection to the coolant. Maybe in a branch of a tee, with some kind of lint free filter?
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Unread 01-10-2003, 04:47 PM   #8
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That is the most perfectest reply I have every recieved! Thanks!
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Unread 01-10-2003, 05:13 PM   #9
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You're most perfectestly welcome! I've never tried it, but it makes sense to me.
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