I have lived within a couple miles of the Atlantic for 48 years. I ride along coastal highway nearly everyday. I have never had a significant issue with corrosion. I am not obsessive about cleaning my bikes, but I do keep up on the maintenance. My bikes are never stored outdoors. My usual drive train work consists of simply wiping the chain, rings, cassettes and derailleurs with a rag, then lubing and wiping off excess. The chain gets a small drop on each link and wiped really well.