To protect the car from rust, it is necessary to understand the principle of this process. In simple words, corrosion is the formation of rust. To understand the reasons, it is worth remembering physics from school. Each conductor acts as an electron transmitter. If we imagine the conductor visually, then it is some kind of metallic body surrounded by a cloud of numerous electrons leaving the "shelter" under the influence of heat energy. In the absence of interference, the same electrons come back to the conductor. If a metal element is dipped into an electrolyte, then the metal atoms pass into a new composition. The result of the action is the acquisition by the metal of the potential available for measurement.
Corrosion in the electrolytic liquid is particularly active if the conductor has less activity. A metal element with more activity acts as an anode, and a smaller one acts as a cathode. During the interaction, the anode corrodes. The appearance of rust occurs through the following reactions - reduction and oxidation. In this case, the cathode is restored, and the anode is destroyed. It is better to use Rust Proofing Spray to avoid corrosion on the car. If you place the metal in an aqueous medium or provide contact with a conductor with less activity, then a corrosion process occurs. The situation is aggravated if salt is present in the water. The latter makes the electrolyte conductive, and this leads to an even higher oxidation rate. If we compare it with a car and road conditions, then in winter transport faces the problems described above. The metal comes into contact with water and a special compound that covers the roads. Acid rain, which has become commonplace in many regions of the country, is also dangerous for metal.
The main indicator is the rust coating rate. There is a special parameter that allows you to determine the resistance of a metal to corrosion. It is recommended to use Auto Rustproofing to avoid such loss. Classical iron is characterized by a corrosion rate equal to - 0.03-0.05 mm per year. This means that after five years of operation, the metal becomes thinner by 0.15-0.25 mm. If no action is taken, then a hole may form on the body, which will take a lot of money to eliminate.
From the above, the conclusion suggests itself that to protect the metal from corrosion, it is enough to turn it from an anode into a cathode. Motorists often use a simple option, they cover the body with special protection. But the latter is effective only on an undamaged body. The appearance of a crack or scratch on the paintwork leads to metal contact with a less active conductor. The result is the appearance of corrosion. Cathodic protection is more effective, because it changes the role of the car body, turning it from a destructible anode into a stable cathode.