– Maxim Mikhailovich, let’s, as they say, from the stove: what is the service life of a car paint?
– There are certain standards and even GOSTs. According to them, the paintwork should last three years in a humid climate and five years in a temperate climate. In this case, it is necessary to separate the concept of “paint” and “coating”. The coating is a whole layered cake. First comes the preparation of the metal, then phosphating, application of the primary primer, then cataphoresis, secondary primer, base and lacquer. And this “cake” must be on the car for at least five years.
– A well-painted car can rust without defects?
– Here’s the whole question of how the already mentioned “pie” was prepared. Have you applied all layers? All dried according to the rules? In the USSR, cars rust, because sometimes they did not even paint with primer – only paint. If the technologies are maintained correctly, the materials are of high quality, then rust should not appear, the paint will not peel off, oxygen will not enter it, oxidation will not occur, rust will not form.
– By the way, are the paints for a new car different from those for repairing a used one?
– And how! The repair material is different, in particular different drying temperatures are specified. On conveyor belts it reaches 130 and even 160 degrees Celsius, and in repair shops they can dry at 60 and even at 20. Another chemistry designed to work in more accessible, simple conditions. The conveyor belt is a specialized technique, robots, application without the slightest defect.