Swiftech's heatsinks were what I was referring to; not sure if the new helicoid pins are anodized but some of the earlier ones weren't. Alphas are anodized black, but not the part where the copper and aluminum touch (the anodizing is done post-production).
Your shrouds look very nice, but I personally believe there is more than a little FUD in your comments about corrosion inside a computer case (airplanes are faced with a greatly different environment than the PC, and aluminum exposed to air will usually form al-oxides that are resistant to corrosion anyway).
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