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Why you shouldn't mix Alu+Copper. Another Horror History. - Page 5

post #41 of 51
I don't understand the fuss here. I work in the automotive field and see aluminum and copper mixed all the time with no ill effects. You can never run just distilled water and not expect corrosion if you are mixing metals that is just silly. You MUST use a coolant with a corrosion preventer.

My loop runs distilled water and automotive coolant. Why is it that this method often seems shunned? Its spoke of like you are not doing it right if you do that. Or you are being cheap. With all the issues I have seen with this coolant and that it seems to me like regular prestone is the smartest way to go.

You need to keep the ph neutral as well. When ph gets out of whack corrosion is accelerated as it is easier for galvanic corrosion to occur. You already have an unbalanced medium with two different metals add some movement of the water and boom. I see it all the time in large diesel engines. When the ph gets out of whack everything corrodes quickly. Keep an eye on that. Test strips are cheap to get at a parts store. As a bonus you can monitor for a similar effect in your own vehicles.

Keep It Simple Silly. words to live by. There is no need for all this computer coolant stuff when the best is right at the auto parts store.
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post #42 of 51
Thanks Gildadan.
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post #43 of 51
But it's easier and for the pump/any type of gaskets used, not meant to be used with coolant, it can lead to ugly stuff. Also, clear tubing get stained.
    
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post #44 of 51
Quote:
Originally Posted by gildadan View Post
I don't understand the fuss here. I work in the automotive field and see aluminum and copper mixed all the time with no ill effects. You can never run just distilled water and not expect corrosion if you are mixing metals that is just silly. You MUST use a coolant with a corrosion preventer.

My loop runs distilled water and automotive coolant. Why is it that this method often seems shunned? Its spoke of like you are not doing it right if you do that. Or you are being cheap. With all the issues I have seen with this coolant and that it seems to me like regular prestone is the smartest way to go.

You need to keep the ph neutral as well. When ph gets out of whack corrosion is accelerated as it is easier for galvanic corrosion to occur. You already have an unbalanced medium with two different metals add some movement of the water and boom. I see it all the time in large diesel engines. When the ph gets out of whack everything corrodes quickly. Keep an eye on that. Test strips are cheap to get at a parts store. As a bonus you can monitor for a similar effect in your own vehicles.

Keep It Simple Silly. words to live by. There is no need for all this computer coolant stuff when the best is right at the auto parts store.
That's why you should always be knowledgeable in what you're loop is made of, some people buy stuff and don't understand that you can't mix metals in a purely distilled system. I really don't see coolant as a problem in a loop as it does the job very well with no ill effects, just not always needed.

Defiantly something for people to think about when they are putting together their system.
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post #45 of 51
Quote:
Originally Posted by gildadan View Post
Keep It Simple Silly. words to live by. There is no need for all this computer coolant stuff when the best is right at the auto parts store.
Which would you recomend? It's not as simple as it used to be lol. Dexcool, he old green stuff, VW has their own stuff too.
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post #46 of 51
Quote:
Originally Posted by MrJackson View Post
Which would you recomend?
Distilled water, biocide (PT Nuke / KillCoil) and an all copper / brass / nickle loop. You do not need coolants unless you mix aluminum in there, which you don't need to do.
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post #47 of 51
Why do companies even make anything water cooling related with aluminum? Is it a cost thing or just stupidity?
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post #48 of 51
Quote:
Originally Posted by huhh View Post
Why do companies even make anything water cooling related with aluminum? Is it a cost thing or just stupidity?
I would imagine cost. Look at the Zalman Reserator:



Imagine making that out of copper, it would cost a fortune (and weigh a ton). Using alu and including a coolant brings the price down. Unfortunately it leads to problems further down the road.

My example was from a Reserator, and I did everything I was supposed to according to the instructions. The coolant broke down, my temps went up, and the blocks corroded.

Long story short, avoiding coolants is easy, just don't use aluminum and you don't need them. Problem solved.
Edited by GingerJohn - 4/17/11 at 7:55pm
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post #49 of 51
Quote:
Originally Posted by GingerJohn View Post
I would imagine cost. Look at the Zalman Resorator:


Gotta admit though it looks awesome.
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post #50 of 51
Quote:
Originally Posted by huhh View Post
Gotta admit though it looks awesome.
I will admit, it does look very impressive on your desk, sadly it performs about on par with a single 120mm rad...
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