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Question about Mixing metals

post #1 of 28
Thread Starter 
in a watercooled build,

Is it important to keep the same kind of waterblock materials/metals for all your devices you are cooling?

for example:

EK waterblock - nickel plated electrolytic copper
Kryos HF .925 silver edition - Silver / and copper

Or does it not matter?
post #2 of 28
Copper, nickel and silver are all fine in the same loop. Once you add Aluminum, then you need to be worried about corrosion.
 
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post #3 of 28
Google "galvanic corrosion" if you want to know why.
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post #4 of 28
It doesn't really matter keeping the materials the same but I have heard that silver is used in some water cooling systems as an antimicrobial agent to keep your reservoir from getting filled with bacteria. But I am not really sure weather or not that works I mean 50C+ water is already rather inhospitable. SO tho answer your question It does not matter if the materials match.
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post #5 of 28
Quote:
Originally Posted by DSP1 View Post
It doesn't really matter keeping the materials the same but I have heard that silver is used in some water cooling systems as an antimicrobial agent to keep your reservoir from getting filled with bacteria. But I am not really sure weather or not that works I mean 50C+ water is already rather inhospitable. SO tho answer your question It does not matter if the materials match.
With the exception of Aluminum. You will see corrosion in a loop if you mix nickel/copper/silver with aluminum unless you use anti-corrosion agents and even then you need to be pretty strict about maintaining the loop.

50c doesn't mean anything for growth. Light + heat + contaminants = eventual growth. Besides, the water in the loop has a very hard time getting to even 40c unless you are overtaxing the loop with a lot of heat and very little rad space.
 
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post #6 of 28
Thread Starter 
Quote:
Originally Posted by Angrybutcher View Post
With the exception of Aluminum. You will see corrosion in a loop if you mix nickel/copper/silver with aluminum unless you use anti-corrosion agents and even then you need to be pretty strict about maintaining the loop.

50c doesn't mean anything for growth. Light + heat + contaminants = eventual growth. Besides, the water in the loop has a very hard time getting to even 40c unless you are overtaxing the loop with a lot of heat and very little rad space.
so why would anyone want aluminum in their loop?
post #7 of 28
It's not just aluminium. see list below.

The metals above will resist the metals below. The greater the distance is between two metals, the greater the speed of corrosion.

Platinum
Gold
Graphite
Silver
Silver Solder
Titanium
Hastelloy C 4)
Monel
Stainless Steel (passive)
Nickel (passive)
Nickel-copper alloys
Bronzes
Copper
Brasses
Nickel (active)
Lead-Tin Alloys
Lead
Tin
Soft-solder
Hastelloy A 4)
Stainless Steel 316 1)
Stainless Steel 430 2)
Stainless Steel 410 3)
Cast Iron
Low-carbon Steel
Cadmium
Aluminum Alloys
Aluminum
Zinc
Magnesium Alloys
Magnesium
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post #8 of 28
Quote:
Originally Posted by Rognin View Post
It's not just aluminium. see list below.

The metals above will resist the metals below. The greater the distance is between two metals, the greater the speed of corrosion.
Nickel, copper, silver and aluminum are the most common metals in loops, with the exception of bronze and brass used in most fittings. Aluminum blocks and radiators are getting harder and harder to find, but they are still on the market. Why would I talk about other metals like Zinc, magnesium, cast iron or cadmium when they simply do not exist in the water cooling world?
 
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post #9 of 28
Quote:
Originally Posted by Angrybutcher View Post
Nickel, copper, silver and aluminum are the most common metals in loops, with the exception of bronze and brass used in most fittings. Aluminum blocks and radiators are getting harder and harder to find, but they are still on the market. Why would I talk about other metals like Zinc, magnesium, cast iron or cadmium when they simply do not exist in the water cooling world?
Stainless Steel, Gold and a couple other can also be found in loops... That and it lists passive and active galvanic corrosion.

Edit: Why so arrogant?
Edited by Rognin - 10/10/11 at 12:23pm
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post #10 of 28
Quote:
Originally Posted by jblanc03 View Post
so why would anyone want aluminum in their loop?
Because aluminum watercooling products exist, and they are significantly cheaper than copper etc. For a custom loop, avoid aluminum and go with copper blocks (nickel plated if you prefer, or silver or gold if you can afford it and want the added bling).

Quote:
Originally Posted by DSP1 View Post
It doesn't really matter keeping the materials the same but I have heard that silver is used in some water cooling systems as an antimicrobial agent to keep your reservoir from getting filled with bacteria. But I am not really sure weather or not that works I mean 50C+ water is already rather inhospitable. SO tho answer your question It does not matter if the materials match.
This is wrong in two ways... the first part has been fully addressed, but the danger is not only from bacteria but also algae, which can easily grow in 50C water, even assuming your loop hits that, which it won't if you have the proper amount of radiators. In any case, unless you run your loop 24/7/365, there will be extended periods where your loop stands at room temp.
Edited by threephi - 10/10/11 at 12:37pm
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