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CPU block gone black?

post #1 of 7
Thread Starter 
I'm taking apart my rig to get ready for Ivy (arriving tomorrow biggrin.gif) and am swapping out my OCZ block with an EK full Nickel and when I took off the fittings I saw some black inside so I had a look inside and found this..
(Excuse half out of focus dark photo, It's almost midnight here and light is currently not plentiful)

IMG_1551.jpg


I've read and seen similar things but don't understand what has caused this and how it is so bad, The loops been running for a few months on distilled water.
Edited by Rian - 4/30/12 at 3:33pm
   
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post #2 of 7
Black is the color of corroded silver so it's possible the cause is the kill coil corroding and leaving corroded particles in your loop.
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by superericla View Post

Black is the color of corroded silver so it's possible the cause is the kill coil corroding and leaving corroded particles in your loop.

Whoops my bad, coil is going in new loop, Old loop didn't have a coil. My mistake.
   
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post #4 of 7
Looks like copper (II) oxide (cupric oxide), pretty much normal.

Bad news - it can be quite hard to remove and is difficult to prevent.

Good news - it should not affect temperatures noticably.

To clean the block go for the ketchup / vinegar / lemon juice bath and scrub.

Edit: See this post on RealRedRaider.
Edited by GingerJohn - 4/30/12 at 3:42pm
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post #5 of 7
One thing I've found to work wonders when cleaning a water block is to use a brush bit with a dremel tool. It scrubs away oxidation and any contaminants without any issues. Use that with a bit of vinegar and it'll be clean in no time. smile.gif
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post #6 of 7

Lemon juice

 
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post #7 of 7
Did you have a biocide in the water? If not that could be bacterial growth although it's hard to tell from the photo.

I used to use lemon juice and salt to clean of oxidation on the blocks but I don't bother now as it just comes back and doesn't affect temps.
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