Dry salt itself won't, but when mixed with moisture, it becomes extremely corrosive. Saltwater is likely to cause metal to rust about five times faster than freshwater. Saltwater is a solution that acts as an electrolyte, allowing the metal to lose electrons faster. Rusting is caused by oxidation, where the metal loses electrons and produces ions. Therefore the presence of salt in a wet environment, speeds up the process.
pretty_kitty_808021 t1_j6689u0 wrote
Reply to Why does road salt accelerate corrosion in a vehicle's underbody? by nebula828
Dry salt itself won't, but when mixed with moisture, it becomes extremely corrosive. Saltwater is likely to cause metal to rust about five times faster than freshwater. Saltwater is a solution that acts as an electrolyte, allowing the metal to lose electrons faster. Rusting is caused by oxidation, where the metal loses electrons and produces ions. Therefore the presence of salt in a wet environment, speeds up the process.