Hello all, This is my first post, therefore I sincerely apologise if this topic is in the wrong place, or if this question as been answered a thousand times before (I searched, didn't find anything, so I'm hoping I won't get banned from this forum straight away Here's my problem: I am designing a mechanical system, which consists of two parts that can rotate about each other. Part A will feature a small but wide shaft, on to which a bearing will be fit. The outside of the bearing will then be inserted in part B, and the two parts will be held together by bolting a cap on top of the shaft. Therefore, part B will be pressed between part A and the cap. Each part will be made from aluminium (currently 6061 alloy, but that's not definitive) and shrouded in carbon fiber, except on the contact area, which will not be covered in CFRP. The bearing will be low-profile (i.e., a wide (80mm) and thin (13-15mm) bearing). My problem is galvanic corrosion between the aluminium shaft and the bearing. How do I prevent corrosion? My guess would be to anodise the alu shaft, but does that pose a problem when fitting the bearing? Should I anodise and then seal the shaft? If it is sealed, will it bond well to epoxy resin? Would an aluminium bearing be more suitable (the load the bearing will take is about 2000N (static))? To reduce lateral play between the two parts and keep friction to a minimum, my idea was to put PTFE gaskets between the parts. Can PTFE be "squished" a little to reduce play and account for wear? Is another material more suited, or should I just let the aluminium parts slide against each other? I hope this is clear, if not, I'll include a drawing. Thank you all very much for your help.