Although road salt is necessary for safe transportation when snow and ice accumulate on roads and highways, taking active steps to protect your car from road salt is necessary to avoid rust and corrosion and general loss of your investment.
Salt was first used in snow and ice control in the 1930s to make roads safe and passable by creating a lower water freezing temperature. Salt is the most available and cost-effective de-icer and is easy to store, handle, and apply. Unfortunately, road salt also promotes rapid corrosion.
When salt is on the road, washing your car is the major factor in combating corrosion and maintaining the value of your car. Salt that remains on a vehicle surface and undercarriage for any length of time can;
Snow and sleet contain corrosive road salt and rain and snow collects pollutants in the air and drops them as acid rain which can damage the protective finish of your car.
Vehicles are one of the biggest investments we make in our lifetimes and protecting them from the ravages of the environment, such as salt and rust is important. Certain vehicle problems are inevitable, but rust from road salt is one that can be prevented.
Some of the areas of vehicles that are most affected by rust are body panels including doors, fenders, the hood, and tailgate. The reason for this is that they inherently have areas that retain moisture. Depending upon the model of vehicle, there are many other areas that can retain moisture as well. Certain cars retain more moisture just due to the way they are designed, so you have to be especially careful and vigilant with them. Some factors that you have no control over include the environment in which you live. If you live in a coastal area you are exposed to more salt air for example. If you live in an area where there is snow and ice on the road, the authorities usually use salt on the roads which can result in rust on your car's undercarriage.
Rust proofing only works on new vehicles. Rustproofing a pre-owned vehicle may trap dirt and moisture beneath the product resulting in an increased risk of rust and corrosion.