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silver kill coil, not working - Page 13

post #121 of 205
Could contamination of water or coolant used ( we can never get everything out of the tubing and other parts in the loop no matter how much we flush) contribute to this ?
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post #122 of 205
Quote:
Originally Posted by Martinm210 View Post

...everything I've read requires direct metal to metal contact. You don't have metal contact with a silver coil sitting in a reservoir.

True, but what you do have is dissolved silver being agitated and pumped around the loop. With warm conditions and high levels of oxygen, I could imagine that condition 2 can be met.
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post #123 of 205
When it comes to mixing metals that are barely too far on the anode chart, using an anti-corrosive should slow the process down to where you'll have no problems until the block is outdated.

Just pick one that doesn't gunk/stain, some research is all.

Any mixed metals will corrode, it's just how long until you notice.
post #124 of 205
Commercial ethylene glycol (engine coolant) contains anti--corrosion additives. The ethylene glycol itself has no anti-corrosion properties.

As also noted by Martin, the black solid is most likely to be copper oxide, which is a black solid. Siliver oxide is also black, but the fact that the copper surface is black suggests that it is copper oxide. The OP noted that the silver coil was partially black, which is also an indication of oxidation . If indeed the black stuff are oxides, then there must be oxygen dissolved in the water.

It does not appear that there is any significant corrosion happening -- only oxidation. If galvanic corrosion were happening, you should see noticable metal transfer -- which is not visible in the OPs pictures.

Recommend that the OP make sure the system is liquid full (no pockets) with distilled water and assure there is no air-water mixing in the system.
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post #125 of 205
Quote:
Originally Posted by Misterstrategy View Post

Recommend that the OP make sure the system is liquid full (no pockets) with distilled water and assure there is no air-water mixing in the system.

Building on this; OP can you fill your reservoir above the angled piece so that water doesn't fall into the bottom of the res?
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post #126 of 205
Quote:
Originally Posted by rdfloyd View Post

True, but what you do have is dissolved silver being agitated and pumped around the loop. With warm conditions and high levels of oxygen, I could imagine that condition 2 can be met.

I wonder about that too, but I would think if it's really galvanic corrosion the collection of materials should be pretty obvious on the kill coil too. You would think copper ions would leave the GPU blocks and either float around or get stuck to the silver coil. But in this example there is black stuck to the copper which looks more like copper oxide as noted above.

I have heard about issues with the Heat Killer CPU blocks in which they did some testing and found the black to be copper oxide and due more to dissolved oxygen rather than anything else.

I imaging a lot of these reactions are stimulated by extreme PH levels too, but I'm pretty much just learning about it myself.

I bought some water quality meters just recently so I could do some conductivity and PH type tests regarding fluids and corrosion. Brand new meters that I hope may be fun in learning more about water quality in our loops.smile.gif
    
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post #127 of 205
Thread Starter 
Update:

I found where the corrosion happened guys. My Bitspower shiny silver fittings are COMPLETELY corroded on the inside. The nickel is gone and you can see bare copper. They were nasty looking (black crap) on the inside so I clean them with vinegar/water solution and I can see copper.

Is it possible bitspower used subpar quality nickel, or have issues with there plating process? Bitspower is always what people recommend, and I have not heard of any problems with there nickel before.

This has me worried as I just bought a bunch of bp 7/16 x 5/8 comp fittings. =/

Quote:
Originally Posted by Misterstrategy View Post

Commercial ethylene glycol (engine coolant) contains anti--corrosion additives. The ethylene glycol itself has no anti-corrosion properties.
As also noted by Martin, the black solid is most likely to be copper oxide, which is a black solid. Siliver oxide is also black, but the fact that the copper surface is black suggests that it is copper oxide. The OP noted that the silver coil was partially black, which is also an indication of oxidation . If indeed the black stuff are oxides, then there must be oxygen dissolved in the water.
It does not appear that there is any significant corrosion happening -- only oxidation. If galvanic corrosion were happening, you should see noticable metal transfer -- which is not visible in the OPs pictures.
Recommend that the OP make sure the system is liquid full (no pockets) with distilled water and assure there is no air-water mixing in the system.

If ethylene glycol has no anti-corrosive properties, why is Feser selling it as an anti-corrosive/inhibitor? Isn't that false advertising?here is a link

As for air in the loop, Im pretty sure I got all the bubbles out. Also, my pump was only at 45% speed so there wasn't any real turbulence in the res. I suppose it is possible there was dissolved oxygen, but i doubt all that black stuff is oxidation. Especially seeing that my nickel plated fittings are corroded. However, this is a new peice of the puzzle. I can see why people would think oxidation.


Edit: Im going to try and post pics of the fittings, but it is going to be hard because of the angle. All the corrosion is on the inside, but there is some on the threads which should show up in a picture.
Edited by AliceInChains - 2/9/12 at 9:44pm
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post #128 of 205
Thread Starter 
Can copper oxides in the water corrode nickel? Is it possible the oxidation took place first and then cause corrosion to the nickel?
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post #129 of 205
Copper and nickel generally won't affect each other. They will react with each other and cause corrosion under extreme conditions, as in if they are touching each other and separation occurs in the nickel plating (IE, scratch a scratch). This reaction would only happen in the close proximity mentioned before, and not from one block to another. How any oxidation of copper would affect that, I'm not sure.
 
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post #130 of 205
Didnt bother reading the whole thread, but heres the answer.

A crucial difference between the cowboy's drinking water and the water you use in water cooling system is purity. Silver does not dissolve in water. The distilled water you use will certainly not be clean for very long, among other things, it will take up CO2 as soon as it comes in contact with air and become slightly acidic. Something silver will be dissolved as ions, but in very low concentrations and very probably not enough to have any effect at all.

Is there evidence that silver prevents organic fouling in the water cooling system? No, absolutely nothing. In forums around you will find users who claim to have good experiences with silver and you will find users who claim that the silver does not have any effect, it grows anyway.

A prerequisite for organic fouling is the presence of microorganisms. Using new and unused components and only distilled water can get a water cooling system free from organic fouling. Feel free to choose to use silver as well, but the absence of fouling should be attributed to the absence of micro-organisms and the presence of silver.

What about the galvanic corrosion, silver would be a danger in this respect? Proponents of silver would argue that there is no risk and refer to the galvanic index. It is a mistake. The galvanic index applies to metals that are in contact with each other and are not relevant. For two metals immersed in electrolyte (coolant) must be risk assessed based on Standard Electrode Potential. On the table is unfortunately silver is a good distance away from other metals such as aluminum, chromium, nickel and copper.
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