Bottom Bracket - non drive side cup

[gxaustin]

The non drive side cup of my cartridge BB is aluminium. I plan to put it in an alloy frame. Has anyone had a corrosion problem with ally screwed into ally? I shall of course use copper grease on the threads but I have had to get quite brutal with BBs to remove them from alloy frames before now.
Thanks

[robgul]

I've not had a problem but if you're worried you could use a plastic cup - it doesn't do much as most of the strain is on the drive side of the BB shell (ask at the LBS ...)

Rob

[alexnharvey]

Aluminium is bad for galling. I'm not sure that copper anti seize is best for it. Zinc or non metallic ones are recommended instead.

[Brucey]

if you want to get a BB out easily in the future then

a) you need to use anti-seize on it (and IME copper-ease is as good as anything)
b) you need to stop water from getting into the frame
c) it isn't a bad idea to remove the BB every year or two and repeat the treatment.

cheers