Rust Status of Cars with an Anti-Rust Guarantee in the Nordic Countries

In the sample test accounted for in this article, 650 cars of 18 different makes were inspected with respect to resistance against perforation corrosion. The method applied - that of sawing out body parts from collision-damaged cars and inspecting internal open surfaces and crevice surfaces - allows corrosion attack to be discovered at an early stage. The results show great differences in corrosion resistance between different makes of car. For some makes, severe crevice corrosion was found on three-year-old vehicles, whereas other makes included six-year-old vehicles without any severe attacks. The results also show that the makes with the best corrosion resistance had a favorable construction, combined with the use of precoated material with a certain thickness of the zinc or zinc-alloy layer and the use of anti-rust agents with good penetration properties.