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Help! Corrosion in my loop

post #1 of 26
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Here is my setup:
2x Alphacool UT60 480mm full copper radiators
Bitspower nickel plated copper waterblocks for 3GPU/CPU/motherboard
Primochill advanced LRT tubing 3/8 ID 5/8 OD
XSPC photon 270 reservoir + D5 pump combo
Bitspower pump top + redundant D5 pump
EK ACF fittings

1) Its been 3 weeks and there is some rust buildup on my fittings and CPU block. It came from the alphacool rads and I intend to replace those with 2x EK 480mm XE rads. However, if I clean up my loop and there is still residual rust left that I wasn't able to get to, will it cause my other components such as the new rads, waterblocks, etc to corrode as well?

2) If the answer to (1) is yes, how will that work? Isn't the rust simply just some oxide that is inert?
post #2 of 26
Are you sure its actually rust?

Were the Alphacool rads new or second hand? If they were new - did you clean them very thoroughly as they are known to have a lot of flux residue in them from manufacture.
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post #3 of 26
Quote:
Originally Posted by Costas View Post

Are you sure its actually rust?

Were the Alphacool rads new or second hand? If they were new - did you clean them very thoroughly as they are known to have a lot of flux residue in them from manufacture.

Im going to go with this one, I had 2 UT60 480mm's 1 used 1 new, and the new one was just full of nasty gunk.
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post #4 of 26
Thread Starter 
Quote:
Originally Posted by Costas View Post

Are you sure its actually rust?

Were the Alphacool rads new or second hand? If they were new - did you clean them very thoroughly as they are known to have a lot of flux residue in them from manufacture.

I got both of them new from performance pcs. The residue was a reddish brown color.
I rinsed the rads a like 8 times with plain water and then distilled water but not much gunk came out of it then.
post #5 of 26
Thread Starter 
Quote:
Originally Posted by ShortySmalls View Post

Im going to go with this one, I had 2 UT60 480mm's 1 used 1 new, and the new one was just full of nasty gunk.

What did the gunk that came out look like?
post #6 of 26
you have to rinse with hot water. i have never seen a copper radiator rust. rust is an oxide. residual rust means you didnt clean your loop well at all. rust is and also isnt corrosion.
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post #7 of 26
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Quote:
Originally Posted by pc-illiterate View Post

you have to rinse with hot water. i have never seen a copper radiator rust. rust is an oxide. residual rust means you didnt clean your loop well at all. rust is and also isnt corrosion.

I did rinse with hot water but not boiling. I read that other than copper, the rad also contains tin and/or brass from the brazing process(source: https://martinsliquidlab.wordpress.com/2012/01/24/corrosion-explored/). How can I determine if my rad has corroded or if it is just gunk?
post #8 of 26
Quote:
Originally Posted by 0x00000000 View Post

I rinsed the rads a like 8 times with plain water and then distilled water but not much gunk came out of it then.

you have to shake the hell out of it and the water has to be as hot as your gloved hands can handle it.

if the radiator was corroded it would be leaking. brass doesnt rust. the tin solder can rust but when/if it does, the rad will leak.
the entire radiator is copper except for 1)the threaded brass port inserts and 2) the tin solder holding the entire thing together. both of my alphacool rads are 3 years old and show zero corrosion. i use nothing but distilled water and algae biocide.
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post #9 of 26
Thread Starter 
Quote:
Originally Posted by pc-illiterate View Post

you have to shake the hell out of it and the water has to be as hot as your gloved hands can handle it.

if the radiator was corroded it would be leaking. brass doesnt rust. the tin solder can rust but when/if it does, the rad will leak.
the entire radiator is copper except for 1)the threaded brass port inserts and 2) the tin solder holding the entire thing together. both of my alphacool rads are 3 years old and show zero corrosion. i use nothing but distilled water and algae biocide.

I see. Hmm, how did your gunk look like when you first got your alphacool rads?
post #10 of 26
You have to rinse first with vinegar and hot water (50-50 mix I do). I rinse two times with vinegar. If you got corrosion inside, it will come out blue (with brass & copper). Brass is an alloy made of copper and zinc. Acid solution + copper oxide (very dark) = blueish solution.
With new radiators, it takes all the residues off. After that you need to rinse with hot water to get the vinegar out. You don't stop until you see nothing in the water that is coming out. So you have to empty the radiator into something and check for residues.
You gotta shake very hard. I put a towel to block the holes and protect my hands because the radiator gets VERY hot and I shake it as much as I can in various positions.
Oh yea and the fins of the radiator are made of iron (or whatever alloy) and if some water get on when your are cleaning the inside, you will get redish corrosion (that we can see on cars by example). A leaking radiator can also cause this kind of rust.

If your fittings are nickels, the block copper and the radiator is brass, you will be fine. But if the radiator is aluminium, copper and aluminium will react. Same apply for the fittings, you need to know what they are made of.

Without any picture, it is hard to judge what is the problem. Maybe you got something leaking? I have iron clamp so if some water went out, it would likely corrode the clamp.

Blueish corrosion in the radiator (brass) and dark corrosion (copper) is normal but a slow process. After 2 years, my block was completely dark with no anti corrosive used (only distilled water in the loop).
Edited by Just a nickname - 10/18/15 at 6:52am
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