the late 2000 are ok for corrosion, old 20 with solded airframes and DLE were indeed sensitive, again the ground service manual is very well documented on the matter of the after effect of de-icing fluid.
As far as brake freeze is concerned, they are carbon brakes, therefore they hate water, there is an optional brake heating system, valuable if you operate in cold and unfriendly places all the time, otherwise this device can be a bit of a PIA.
It is a BBW as well, so there is a procedure before landing and after take off to address the situation, but most malfunctions on the gear are coming from proximity switches not being properly adjusted for temperature ( these are magnetic fields, and have to be rigged according to an operating temperature)