I live near the beach in Florida. I grease up everything on my bikes. Used to use Vaseline as assembly lube on my threads & cables. But, now I use green waterproof grease on everything. Back when I had a house directly on the beach, I used to spray a mist of WD-40 all over my entire bike. Then, wipe off the rims with alcohol. All metal parts corrode regardless if they're steel, aluminum or other alloys.