I know what Galvanic Corrosion is. Thanks to the sticky. I've always kept a little bit an eye on my watercooling system. And it never really seemed to cause any problems.
I mostly used Zalman waterblocks.
They all seem to have "corrosion-preventive anodizing". Just like the Resorator itself.
What does this exactly mean ?
I always thought it meant that those waterblocks and the Resorator where kinda protected against corrosion. So you didn't need to watch out much.
The non-Zalman stuff I've used has been an EK waterblock:
http://ekwaterblocks.com/shop/product_i ... cts_id=143
made of electrolytic copper.
And a watercooled PSU from silentmaxx.de:
http://www.silentmaxx.de/en/products/si ... ooled.html
I couldn't find the material, but I always assumed it used anodized aluminium too.
When I ran with the PSU, I noticed no wear on the Resorator. I can not really look inside the PSU, but from what I can see, there were no indications of any quicker oxidation or rust particles in my sytem or in the water.
When I removed the PSU, and brought in the 8800 waterblock, I also replaced the broken clip by a metal one. Then I immediately noticed the oxidation. It was a steel clip with a cover of some protective metal. The protective layer started to rust like crazy. But the metal underneath seemed fine. So I thought the top layer (1mm or less) would have gone in a matter of weeks, and the problem would then have been gone. About the EK waterblock, half of it is made in see-through plastic. I can see there's actually no rust process inside. So I assumed that the EK waterblock (electrolytic copper) and the Zalman parts worked together fine.
Anyway, the EK block is out of my system now. I'm using my old 7950GX2 the standard fan, while waiting to decide what to buy next. I just found out about the Accelero S1 Rev. 2 yesterday. I might buy a 4870/1GB and put an Accelero on it. (Nowadays I have a little airflow through my case again, so the Accelero should be fine).