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Case rust

post #1 of 13
Thread Starter 
This is now the third case in two years that I have had go rusty.

It's the weather, I know it's the weather. It's too damn humid. But it can't be only the weather.

My Antec 900 went rusty on the back fan outlet grill. I just replaced the case with an NXZT Tempest Evo, thinking it would be ok and that it was just something that happened because the case was poor quality.

Then the Tempest Evo went rusty. I blamed myself for that, that and the weather, as it was one of the wettest years on record with flooding, etc. I let the dust build up too high on the grill, and the dust got wet and rusted out the front panel. Also the side panel fan, also the TRUE I had installed. Also the power supply blew up.... It was a wet year.

So, after getting a new Tempest Evo (as I liked it) I bought a de-humidifying air con and run it every day there's high humidity. I use damp rid in the area surrounding the case. I built a stand for the PC so it wasn't on the carpet and I keep the dust down by cleaning the case weekly.

But still, this week, I found rust. Only a small portion, and only on the side fan grill (as far as I can tell, atleast) which I have now removed. I did notice a spot of water on the fans I use to run the CPU heat sink. I don't understand it at all.

What am I doing wrong? Surely there are places with higher humidity than where I am? Surely I am doing the best I can?

What should I enact to prevent future occurances? What cases would be better for higher humidity places? The grill on the NZXT is very fine, so the dust builds up very quickly and is hard to disperse completely. Perhaps that is an issue? That said, though, the Antec 900 back grill was not so fine and that went.

I'm so depressed.
post #2 of 13
Have you tried using zinc, not sure if an anode would work but a can of zinc rich primer (before parts installation) should do the trick.
Hal
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Hal
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post #3 of 13
Thread Starter 
I've never tried a primer of any sort. I considered buying an aluminium case, but the price was just too ridiculous. That said, if they are really worth buying I would get one for my next build.

Will either the primer or the aluminium stand up to continual humidity and the movement of the air through the case?
post #4 of 13
Aluminum doesn't rust and may be the easier option. If the rust isn't too bad I would save my money and do a through cleaning of the rust and give the primer a try.

As for the life of primer, if done right I don't see why it wouldn't last for a few years. Make sure it's designed for rust or says it has a high zinc content.

I am not an expert, and recommend you do a little research first about primers and rust.
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Hal
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post #5 of 13

Dust and high humidity are a bad couple. Dust contains dirt that has chemicals which become reactive under high humidity condition to corrode your case.  The fact that you see corrosion happens at fan grille areas because those areas accumulate dust most easily.

 

Using an aluminium case will eliminate rust in the traditional sense but aluminium still corrodes and gets oxidized easily.

 

So, lowering the room humidity and keeping the case (and your room) clean are still the best preventive measures.

 

Of more importance is that this not only affects the chassis but also other components inside the case as you already noticed that even your TRUE suffers corrosion. Your sig rig shows a Venomous X Black which already has received a black nickel plating to slow down oxidation deterioration. If you still see corrosion on the VX Black, your room must be truly dusty and humid!

 

One more suggestion:- instead of using an air conditioner to take benefit of its side effect of lowering the humidity, I suggest using a dehumidifier unless you also want to lower the room temperature. This is because if the air conditioner is continuously used overnight  with your PC being turned off, the chassis and other components might be cooled down enough to a point that condensation might form on the surface (when the air con is turned off somehow later) under a high humidity environment. This might explain why you see a spot of water on one of the fans.  So, using a dehumidifier will just lower the humidity without affecting the room temp much.  As I live in the topics and so I know a little to deal with high humidity.

post #6 of 13
Thread Starter 
I don't use the air con at night, and have it set to cool to only 21C. I keep the place very fastidious, and I clean the case as regularly as possible (about a week). Not too much dust builds up, but I do get some.

I may have to get a dehumidifier, but I really was trying to avoid that.

I bought the air con as it gets so damned hot here, too.

So, pretty much, just keep the place clean and at the minimum amount of humidity possible? It doesn't matter what case I buy?
Edited by Daveros - 1/30/12 at 7:16pm
post #7 of 13
Quote:
Originally Posted by Daveros View Post

I don't use the air con at night, and have it set to cool to only 21C. I keep the place very fastidious, and I clean the case as regularly as possible (about a week). Not too much dust builds up, but I do get some.
I may have to get a dehumidifier, but I really was trying to avoid that.
I only bought the air con as it gets so damned hot here, too.
So, pretty much, just keep the place clean and at the minimum amount of humidity possible? It doesn't matter what case I buy?

Yes, that is pretty much you can and should do.

 

Let me show you what one of my aluminium case looks like when the surface is oxidized.  As the pic below shows, the oxidation/corrosion is not the red rusty iron oxide but a slight whitish coating.  I do not bother to clean it as the surface will get oxidized soon enough again.  It does not do much harm.  Actually the layer can be a protective layer against further oxidation.  It just does not look shiny but still looks better than red rusty iron oxide, IMHO.

 

usb fan provides active ventilation at rear of case.JPG
 

 

post #8 of 13
Thread Starter 
Right, screw it, I've bought a dehumidifier. It'll help for upstairs anyway, when I'm not using it near the PC.

I'm still only rocking with LGA 1366. I'm just gonna run it till it dies at this point, and salvage what I can afterwards (I mean, I'm going to take care of it, but I'm not investing heavily in the system again). Hopefully it'll last till Ivy-E. Hopefully the dehumidifier will do the trick and my Ivy-E won't rust.

Thanks very much for all your help, guys.
post #9 of 13
I would of just recommended buying a case thats completely painted... not just outside.
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Ghost
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post #10 of 13
Quote:
Originally Posted by MacNcheese View Post

I would of just recommended buying a case thats completely painted... not just outside.

Paint still scratchs, then you're back to the original problem. 1 Step forward, 2 Steps back.
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