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Deionized Water Submerged PC

post #1 of 22
Thread Starter 
Hi Everyone,

I understand that deionized water becomes conductive through contamination from electronics. However could I prevent deionized water from becoming electrically conductive through using a filter system, or possibly through the use of additives.
Edited by xtremetechuk - 3/7/11 at 2:33pm
post #2 of 22
Quote:
Originally Posted by xtremetechuk;12647116 
Hi Everyone,

I understand that deionized water becomes conductive through contamination from electronics. However could I prevent deionized water from becoming electrically conductive though using a filter system, or possibly through the use of additives.

but deionized water is corrosive to metals...
wouldnt that be a problem for your metal circuits?
    
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post #3 of 22
Quote:
Originally Posted by xtremetechuk;12647116 
Hi Everyone,

I understand that deionized water becomes conductive through contamination from electronics. However could I prevent deionized water from becoming electrically conductive through using a filter system, or possibly through the use of additives.

Fill a bath tub full of distilled deionized water fresh out of the jug. Put two probes from a multimeter into it. You'll see the *once* distilled/dionized water is electrically conductive, as the dust and grime on the tub and in the air is enough for the water to become conductive.

Pure water is a very poor conductor. But water is a GREAT solvent. Hence why you can drop a hot hair-dryer in a bath tub and electrocute yourself. The salts on your skin are enough to make the pure non-conductive water into a *great* conductor.
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post #4 of 22
Yeah, that's the issue with such pure DI water. Since it is so pure CO2 will be absorbed naturally into it and you end up with a minor acidic environment which can actually speed up the degradation of metals and create particulates. DI water is an even better solvent than normal water.

Also I would think that a constant filtration system would be very expensive. Only DI water dispenser I've ever used was in a laboratory environment (18 Megohm water).
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post #5 of 22
Even if you had a completely closed system where there was no dust or other particles the actual components in your rig have a certain amount of solubility.

After only slight bit of dissolved metals enter the water you will begin to have problems and then eventually it will be bricked.

There extremely expensive liquids that could be used, but even they would require a completely closed system for permanent use.
post #6 of 22
Thread Starter 
Thanks for all of the posts,

My ignorance has showed in starting this thread frown.gif
post #7 of 22
Quote:
Originally Posted by xtremetechuk;12647371 
Thanks for all of the posts,

My ignorance has showed in starting this thread frown.gif

but if you don't know... asking is the only way to find out you are wrong.

I dont think anyone who answered you was trying to be mean, or make you feel stupid, you just came across people who know alot about the subject and just spit out some facts.

So don't feel ignorant! Just feel like you learned something!
    
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post #8 of 22
I know...I know...old post but have some old ideas on this I wanted to share. I even wanted to give it a try but I am still short on free experiment time smile.gif. So, idea is that direct water contact with PCB and all that things inside a PS is bad...but what if there is no contact. I've seen that are some special covers like spray's or even bottled substances for covering PCB. Some really resilient to heat, water or whatever you throw at them. What if you'd cover all the PCB with that in some repetitive layers so it becomes water proof? And then dip everything in water. Of course in time things might go wrong. It all depends on the substance used and resistance in time. Thoughts?
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post #9 of 22
will be electrocuted
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post #10 of 22
But why mate? I still believe is just a matter of the substance used. As longs as it's stable in water and it does not act as a super heat insulator it should work. The problem is finding this. I've research a loot of urethane lacquers and some seem up to the job. But off course is a matter of trial and error here. Like an old P4 platform waiting to be sacrificed. smile.gif
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