Vinegar is actually mostly water. It generally does not contain any salt.
It smells like tomato, salt, and vinegar.
5% Salt water is more electrolytic than 5% vinegar
Vinegar is a polar solvent and salt is a polar solute. Therefore vinegar dissolves salt. Plus, salt's are very soluable and will almost always completely disassociate when added to water(you vinegar isn't 100% vinegar, there's also lots of plain water than salt can dissolve in.)
The method is the evaporation of the vinegar water solution.
Zinc will corrode in vinegar faster than salt water