Mixing Alu and Cooper Is Fine, If You Anodize Right
As ever, we're listening to you, our fans, and we've heard some (justified) concerns about the mixing of aluminum CrossChill hybrid heatsink/waterblock with all copper watercooling systems. Typically bare aluminum and copper mixed in an electrolytically active environment (like a watercooling system) will suffer corrosion through galvanic corrosion. However, anodizing the surface of the aluminum replaces the thin layer of aluminum oxide with a much harder and thicker layer. This provides sufficient environmental protection and resistance against galvanic corrosion. ROG's CrossChill anodizing is hard enough to resist galvanic corrosion. To prove the quality and lifetime reliability of the waterblock the ROG RD put the CrossChill through 216 hours of salt-spray testing to simulate three years of corrosive exposure. The results below speak for themselves: little to no effect! 
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