P 227 - Influence of corrosion on the fatigue strength of joined components made of surface-finished sheet metal (vehicle construction)

Some of the test specimens were subjected to oscillating loads and corrosive conditions over a longer period of time. The test results show that there is and can be no universal time-lapse test for this type of stress. The joining part materials, coatings and pairings as well as the joining process and the load must always be considered in a practical manner and in accordance with the conditions on site. Depending on the type of joining technology, different mechanisms are responsible for the behaviour of the joints under these conditions. Under certain circumstances, a low test frequency in the climate can be replaced by a longer exposure time and higher test frequencies. In certain cases, the duration is of decisive importance for the course of various damage mechanisms and can therefore not be reduced below a critical level. The investigations have shown that the test selected for testing the fatigue strength of joints provides useful results and indications for avoiding unacceptable damage when practical conditions are set. The automotive industry and manufacturers of household appliances in particular, but also the construction industry, can benefit from these results. STUDIENGESELLSCHAFT STAHLANWENDUNG e.V.