I am not a pro, but water is cheaper. You don't need to clean it immediatly, it might be able to wait overnight depending on humidity. The "corrosive" element is salt, which attracts moisture and causes rust. A simple HOT water rinse dissolved these salts, and using HOT water heats the metal up so most of the water evaporates in a few seconds. Here is what i do:
-Strip ad soak all small bits in a solvent, I uses kerosen just because I have a little left over from the initial cleaning of my SKS, but any bore solvent will do.
-Take a good cleaning rod and a patch soaked in solvent and clean the bore, gas tube and receiver like you would any other rifle. This removes any carbon.
- use HOT (near boiling) water and flush all parts that come in contact with the gasses. This includes the bore, chamber, gas tube, piston, receiver, gas port. I usually do all metal parts for good measure. Run a dry patch through the bore and gas tube to soak up the majoroty of the water. The rest will evaporate from the hot metal.
-Use a good thick grease and grease the bolt and bolt carrier tracks, the trigger group, and recoil spring. Leave the gas system dry and do not lube the fireing pin.
That is usually how I clean mine. Only thing you might not have is the grease, but a small tube costs like 4 bucks and will last years if uses sparingly.