water cooling metal mixing (corrosion)

[htpcdennis]

Hi,

I have a fairly large loop and wanted to ensure that all metals that have been used should not cause me any concern.

What made me think about this more in depth was a small printed sheet of paper that I recently got with an EK water block. Which is...

EK FC7970 DCII Full Cover Waterblock for ASUS design Radeon HD 7970 DirectCU II Graphics Card : EN Nickel Acetal
- Base Material Nickel
- Top Material Acetal
Here is what the paper said:


I also read on the Koolance web site this....

Koolance's product warranty does not cover the use of 3rd-party coolants, coolant additives, or corrosion. Koolance LIQ-702 or LIQ-705 coolants are strongly recommended to help avoid issues with mixed metals or biological growth. Additionally, do not use aluminum with bare (unplated) copper or bare (unplated) brass in the same system. Do not use silver with nickel in the same system.

The Silver with Nickel I was also concerned about.

Here is what I have...

Koolance RP-452X2 Dual 5.25in Reservoir V2.0
- The materials used on this reservoir are a classic mix of Acetal, aluminium and acrylic.

RADS:
Koolance HX-240HL
- Copper Fins, Brass Construction

Koolance CU1020V
- Copper Fins, Brass Construction

XSPC RX Series
- Copper Fins, Brass Construction

CPU BLOCK:
XSPC Rasa CPU Waterblock
- Base Material Copper
- Top Material Acetal


GPU BLOCK:
Koolance VID-AR797
- Base Material Nickel Plated Copper
- Top Material Nickel Plated Copper & Acetal

FITTINGS:
Koolance Dual VID Connector Adjustable 2-3 Slot
- made of brass

Koolance 1/4" Thread Black Barb for 1/2"
- Nickel Coated Brass

Koolance 1/4" Thread Rotary 45 Degree
- Nickel Plated Brass

Koolance 1/4" Thread 90 Degree Rotary
- Nickel Plated Brass

OTHER METALS:
Silver Kill Coil (in res)

Should I remove the Silver Kill Coil? To prevent issues with Nikel?
The silver coil has a discolouration to it which as far as I know is normal as this is the protection build up (?)

Is there any potential threat to what I have in my loop corrosion wise?

Any advice great fully appreciated.

[Mr.Scott]

EK is just covering their respective @ss's as they've had issues with their nickel plating before.
Koolance is kinda doing the same thing. Both would like nothing better than to sell you their own high priced coolant mixtures.
D water and silver coil is all you need, or D water and a copper sulphate based biocide if you prefer that instead. As long as you have no wet aluminium in your loop there is no need for special corrosion inhibitors.

[htpcdennis]

ok - thanks for your much appreciated reply.

I was aware of the EK issues from the past.

And up until now I've avoided EK but needed to cool a 7970 CUII and there the only
one's I can find making a block for this custom card.

Has it been recent experience that EK have got their act together?

Additional Comment:

Here is something that makes me wonder...

If you move to 2:30 in this video..
Is this not a new res from EK?

http://www.youtube.com/watch?v=OxbP3...7&feature=plcp