What are the good ways to maintain the bicycle while raining season? I have a bicycle. I ride it everyday because it was my primary vehicle. When I was going to campus or another places, I used it. Currently, the raining season is on my country.  I would like to keep my bicycle healthy, for example case, preventing a bicycle chains from the corrosion. Also, another use cases which can be happened while raining season. 

Any good suggestion for that cases?
Use fenders with good coverage! They will keep most of the dirty spray water off your bike. You'll be surprised how much less oiling your chain needs with proper fenders.

Proper fenders means:


a front fender with a mud flap that reaches within a few centimeters of the road
a rear fender that starts some centimeters below the chain stays, so that water dripping off does not end up on the chain