Originally Posted by ROGX
So does everyone think the crosschill block is safe with copper? I'm gonna water cool my m6f with pastel red, and I want to make sure its safe, and I'll have no corrosion issues.
I've been using the crosschill block with alphacool rads and EK Nickel-Plexi blocks for something like 8+ months (was built the week the board was released......) and used Mayhems Pastel red also, I've had zero issues, even tore down the loop in February to check things, they looked just like they did on day one, so I poured the coolant I took out of the system back into it after straining through a coffee filter to make sure there was no debris.
On a side note, go check out the mayhems thread if you have not yet http://www.overclock.net/t/1286896/mayhems-users-club
And depending on your rads, do a VERY thorough cleaning of them, EVEN IF THEY ARE NEW. Pastel is very ph sensitive. So I would recommend you read what @Mayhem
has recommended to do for a good rad cleaning!!
The crosschill block is made of ANODIZED aluminum, not bare aluminum, it has more resistance to corrosion than almost any part of the rest of a WC loop, including nickel plated blocks!!