Innen- und Außenkorrosion von Abgasanlagen für PKW — Prüfverfahren,Labor- und Feldergebnisse

Internal and external corrosion of exhaust systems for passenger vehicles — Test procedures, laboratory and field results Exhaust systems fulfill a variety of tasks and their durability, their mass and their costs are of particular importance. Within the framework of further quality improvements a minimum lifetime of 3 to 5 years is aimed for, depending on the vehicle type. The mass of the exhaust system should be reduced by 20 to 25% without any substantial increase in the cost to performance ratio. The technical concept for muffler systems which fulfill these conditions is examined in this paper. Special attention is given to corrosion, particularly as a result of the effects of exhaust condensate and to the constructional design possibilities for the prevention of corrosion. In spite of all the efforts made it has not been possible up to now to simulate the wet corrosion stability of a complete exhaust system in the laboratory. For this reason the practical testing of the corrosion stability of exhaust systems on test stretches and in traffic cannot be dispensed with.