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Old November 26, 2008, 07:32 PM
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The potential between the two metals is correct, but as best I understand it, Silver is considered a noble metal, and somehow resists corrosion altogether. Ditto for Gold. I have yet to find an explanation that offers more details, but that's my understanding. There has to be something happening, because Silver and gold are even further from Aluminum than copper is, yet the former are used to prevent corrosion.
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Old November 26, 2008, 08:25 PM
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Cant' seem to find it again but IIRC the chart showed gold as the most noble with silver close behind. Farther down the list was copper. As I understand it the more noble metals will not corrode where as the less noble metal will, i.e the silver won't corrode and the copper will in this case. I wonder though if the difference is small enough not to make a whole lot of difference.
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Old November 26, 2008, 08:39 PM
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Galvanic corrosion - Wikipedia, the free encyclopedia

Table: Galvanic series - Wikipedia, the free encyclopedia
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Old November 26, 2008, 08:50 PM
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Even setting aside the idea that silver is supposed to 'resist' corrosion, I'm betting that the voltage difference is too small to become a meaningful issue. Those galvanization charts are usually put together based on salt-water electrolyte, which hopefully no one is using for coolant in their computer. Distilled water would be far less conductive.
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Old November 26, 2008, 10:06 PM
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From the wiki...
The following is the galvanic series for stagnant (that is, low oxygen content) seawater. The order may change in different environments
...so mpg has a point about the dissimilarity of the fluids in question. That doesn't say whether there's a problem or not in stagnant strange ass liquid cooling fluids though.

I wonder if small particles of silver can react on their own with the copper? The two major pieces may be separated but the whole point of the silver is to mix with the water.

What fluid did you use to fill your loop? (looking at the additives if any)
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Old November 26, 2008, 10:11 PM
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That's one of the tables I was looking at. According to the chart BIG gap but I wonder how much of an influence it will have in real life, as MPG mentions the liquid will be distilled and not an electrolyte bridge. If I had to guess the same reaction will happen just MUCH slower.
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Old November 26, 2008, 10:48 PM
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Quote:
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I don't remember a whole lot of chemistry but a little googling shows that the silver and copper in the loop will form about a 0.2V cell with the copper (water blocks) being corroded. Can anyone confirm this true or false?



Hmmm i doubt it as Silver has an electron affinity of -125.7 and copper -118.3 the charge if any is very slight and negligible.
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Old November 27, 2008, 01:56 AM
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I've been running a Pure Silver Storm G5 on nothing but pure distilled water for as long as I remember, no issues. I don't know the reasons why, but people on XS, etc with huge engineering degrees have explained time and time again that silver WILL corrode copper, but because of numerous factors it would take centuries running untouched before you could even BEGIN to notice anything.

Its got something to do with about silver being an inactive/inert metal, I believe which makes there distance on the galvanic scale irreleavent. I believe gold is the same way actually. What little I remember is that only way you'll get corrostion/damage in distilled water is if the silver and copper are directly touching each other. Otherwise nothing will happen with even a 1mm of distance.
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Old November 27, 2008, 06:54 AM
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Good to know!

Nice where did you get that G5?
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Old November 27, 2008, 07:29 AM
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Good to know!

Nice where did you get that G5?
Caught it being sold used on another forum back in dec 2006, I jumped on it like white on rice. I almost bought a 2nd one but the guy who was selling it refused to sell it to me, he thought that since I was Canadian that our money was no good . If I ever come across another one,I will buy it in an instant, they are an excellent little piece of water cooling history.
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