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Running aluminum in loop

post #1 of 13
Thread Starter 
How well do anti-corrosion additives help in preventing corrosion on the different metals in a loop?

Lets say you run the fluid at 6 months at a time, will there be any damage?
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Silent But Deadly
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post #2 of 13
It all depends, if I were you, just stick to copper, it has better performance anyway.
    
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post #3 of 13
Using 100% distilled water will stop any galvanic corrosion from occurring, but the catch is there is no completely distilled water. I recommend using distilled water and a little anti freeze and change out the water monthly. The longer the water stays in the loop the more aluminum and copper particles will build up. Changing the water out monthly should limit the amount of corrosion down to be little to almost nothing.
    
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post #4 of 13
Here is my Zalman block after ~6 months of use with the Zalman ZM-G200 anti-corrosive coolant:

attachment.php?attachmentid=215234&stc=1&d=1308031838

The loop contained an aluminum Resertor as well as the ZM-WB5 CPU block (alu top) and the ZM-GWB3 GPU block (all alu). The loop would actually have been fine if the base of the CPU block wasn't copper.

As you can see, even after only 6 months there is some corrosion (highlighted in red). Note the red square, that particular corrosion spot almost got to the edge of the o-ring. If it had gone any further it could have potentially caused a leak.

This stuff it supposed to be good for a year, obviously it was not up to the task. Also here is how the block looked like before cleaning:

attachment.php?attachmentid=215236&stc=1&d=1308032159

Lovely...

So to answer your question - they are not all that great.


Edit: Needless to say, all this stuff is now sitting in a box in an attic. I really wish I had done my research first, would have saved me money in the long run.
Edited by GingerJohn - 6/13/11 at 11:28pm
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post #5 of 13
TBH, you should stay away from aluminum. Most water loop components are composed of: copper, brass, nickel, stainless and they don't mix well w/ aluminum. Pom/acetal and plexi are cool smile.gif
post #6 of 13
Thread Starter 
I got in on the $40 H50 and looking to use the pump and rad and combine it with a gpu block for some gpu cooling.

$40 for a cheap pump and rad aint bad if I can use it for my gpu.
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post #7 of 13
If you can get away with metal mixing in a loop, then it is good.
However, if you cannot, this does not automatically mean a disaster. Corrosion inhibitor does work if used properly and carefully. For an example, Corsair's Hydro series (H50/60/70/80) does use aluminum radiator with copper block. With proper application of anti corrosion additives, expect no problem.

I have mixed metals (Al+Cu) in my loop since Day 1. It has been 2.5 years now and no problem at all. Perhaps GingerJohn's experience is at one end of the spectrum while mine is at the other end, but if you are on a strict 6-month maintenance schedule, then you are in a much better position than I am as I have not replaced my coolant at all.biggrin.gif
Edited by windfire - 6/13/11 at 11:47pm
post #8 of 13
If you could, I would just stay away from alu in your loop...
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post #9 of 13
Quote:
Originally Posted by homestyle;13864282 
I got in on the $40 H50 and looking to use the pump and rad and combine it with a gpu block for some gpu cooling.

$40 for a cheap pump and rad aint bad if I can use it for my gpu.

Your temps would be higher than Stock on both CPU and GPU if you do this
post #10 of 13
If you are stuck doing a mixed metal loop, then look up past WCing threads that have done this in the past 10 years.

Mainly, the mixture is 33% automotive EG glycol and 66% distilled water. Always use the green automotive glycol and NEVER the long life nor the extended life auto coolant. The long/extended life coolants have very minimal inhibitors for protection.

You can also subsitute the auto EG glycol for Sierra PG glycol RV and Marine coolant since the corrosion inhibitors are for heavy duty use.

The two automotive glycols should do the job well and requires a flush and refill once a year. The PG is acutally better to lubricate the pump to reduce noise and allow the pump life to run much longer. With the corrosion inhibitor with these two types, you will not need killcoil or any algaecide either.

As pangeltveit stated, your temps would be slightly higher by a few degrees too, but not horroriably bad.
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