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Glycol must be at a concentration of >20% says expert - Page 3

post #21 of 25
I bought the Zalman ZM-G200 Coolant 500ML Bottle (Propylene Glycol w/Anti-Corrosion Agents). Used 35% of that with 5% Water Wetter and 60% Distilled Water.
 
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BitoHeaven
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post #22 of 25
Thread Starter 
I guess you had better luck that this guy:

https://www.youtube.com/watch?v=X4z3Pui0NdY
post #23 of 25
For some reason his solution clouded over. Also it seems he did not clean his rads well, lots of residue.

He says nothing so it is hard to get how long his solution was in use, what he mixed with it (if anything) etc...

I know I had to drain my loop, in the first 3 months of use, since I decided to add a 3rd radiator, and the solution stayed crystal clear (see pics);

http://www.overclock.net/t/1442038/build-log-the-hawaiian-heat-wave/200

All I can say is that my solution has not clouded over in over 2.5 years and still looks pristine. I will be breaking down the loop second half of next year which will make the loop running at 3.5 years and will be giving a break-down on everything in the build log of my sig rig.
 
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BitoHeaven
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G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
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post #24 of 25
Thread Starter 
I spoke to a friend who is a chemist again and he said tolyltriazole or benzotriazole in a borate buffer should be adequate as a coolant. The borate would increase the pH. He said he doesn't think it should precipitate out. He wasn't sure about the effectiveness of the biocidal aspect but guessed they would be enough with adequate concentration. He also said tolyltriazole is preferable because it's less likely to volatilize because of its higher molecular weight. He also said it should probably form a better film. He also said that adding 25% propylene glycol wouldn't hurt and that the glycol should also act as a biocide.
Edited by superstition222 - 10/8/16 at 6:42pm
post #25 of 25
Thread Starter 
I just found a study that showed that napthotriazole is even better than benzotriazole for protecting copper. Apparently, the higher the molecular weight, the better the protection.

http://www.corrosionjournal.org/doi/pdf/10.5006/0010-9312-31.3.97
https://www.ncbi.nlm.nih.gov/pubmed/22076907

At least one variety of napthotriazole is also fluorescent. I wonder if any of the UV formulations of coolant are using napthotriazole. Most likely not but that could be an opportunity to not use an unnecessary additive. Tolyltriazole dissolves much less readily in water than benzotriazole and it has a higher molecular weight. So, one would probably be stuck with using propylene glycol to get napthotriazole to dissolve in sufficient quantity.

Napthotriazole does not appear to be readily available for purchase.
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