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Slight Corrosion showing up I think

post #1 of 12
Thread Starter 
Hey OCN. I decided to do a revamp of my system and so I took everything apart today and it so happens that I also decided to clean out my waterblocks from EK. The system has been running for about 2 months on distilled water with a silver coil.

Upon opening the gpu and cpu blocks, i noticed a slight gray layer of what looked to me like corrosion. Also, one of the fittings connected to the cpu block had a thin whitish layer of crap on it. The pump was perfectly fine. On the inside of the blocks, I could tell it was slightly dirty with a lightish gray film of crap.

This was just in the cpu and gpu blocks, no where else. I know this isn't normal. Should I be using silver coil AND pt nuke?
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post #2 of 12
Pictures! Worth a thousand words.

From the sounds of it it is most likely plasticiser from your tubing. Is it a powdery grey susbstance which wipes off with a paper towel?
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post #3 of 12
Thread Starter 
Yeah sorry, I can't get pictures at the moment.

Now that I see it, it is a powder like substance, so i guess it is plasticizer? I'm not sure what that really means.
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post #4 of 12
Plasticisers are addatives that are put into the tubing to make it more flexible. Over time they can leach out of the tubing and deposit on your blocks.

The bad news is that there is no realistic way to stop it short of changing your tubing to one with no plasticiser, or no plasticiser on the inner bore of the tubing (like some food grade Tygon tubing).

The good news is that it is really easy to clean - wipe down with a paper towel and / or wash with clean warm water. You can also use an old toothbrush to clean out some of the crevices.
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post #5 of 12
It didn't look anything like this, did it?

http://www.realredraider.com/vbulletin/showthread.php?t=11373
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post #6 of 12
Like GingerJohn said if wipes off and powdery, likely plasticizer. If dark color and doesnt wipe off, and looks like my block here on copper, it is oxidation layer which always forms on copper blocks, and cleans off in minutes with vinegar/salt.
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post #7 of 12
Quote:
Originally Posted by opt33 View Post

If dark color and doesnt wipe off, and looks like my block here on copper, it is oxidation layer which always forms on copper blocks, and cleans off in minutes with vinegar/salt.

We can't view that picture unless we are a member of OC'ers. Any chance you can re-post it here on OCN?
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post #8 of 12
Thanks GingerJohn for letting me know.... dang learn something new every day.

As an aside, the crap buildup over 1.5 years caused only ~ 0.5C decrease in temps. (I have calibrated temp probes at each air intake, and in water, and tested 1.5 years ago, just before cleaning, and then again after cleaning.)

Pic before cleaning, then after 5 minutes with vinegar/salt/toothbrush.

you will get some buildup even in few months, just not as bad.

278
Edited by opt33 - 2/21/12 at 2:17pm
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by opt33 View Post

Thanks GingerJohn for letting me know.... dang learn something new every day.
As an aside, the crap buildup over 1.5 years caused only ~ 0.5C decrease in temps. (I have calibrated temp probes at each air intake, and in water, and tested 1.5 years ago, just before cleaning, and then again after cleaning.)
Pic before cleaning, then after 5 minutes with vinegar/salt/toothbrush.
you will get some buildup even in few months, just not as bad.
278

No its definitely not like that. Its just really fine film of gray stuff. I'm glad that its nothing serious. Should I still use PT Nuke or is a silver coil fine?

Oh, forgot to mention, this is all nickel plated blocks.
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post #10 of 12
White/grey deposits on nickel is different....if looks like pic below according to EK's report, those deposits were primarily Zinc oxide, zinc from the radiator (brass= zinc+copper).

254

I use all copper/brass so no worries with corrosion, other than copper oxidation, so I can run with pt nuke and nothing else.

If I were using EK nickel or any other mass produced (non-custom) nickel plated block (though I never would), I would be running distilled plus either feser corrosion blocker (requires only 50 mls of it in 2 liters distilled) or liquid utopia corrosion inhibitor + prayer. So could still run 98% distilled which means temps wont suffer at all. And then no need for additional biocide, ie no silver or copper ions.

marine pumps use 75 microns thick nickel coating + hardening layer, and they survive years and years in saltwater, losing only a few microns per year. But EK and some others are using what 10 microns thick plus or minus 5 microns variance, so thin spots + mass produced + ? prep.

Adding another biocide, ie pt nuke definitely wont help if you are seeing what is in pic above.
Edited by opt33 - 2/21/12 at 5:09pm
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