Vibration corrosion cracking
Vibration corrosion cracking is the transcrystalline or intergranular crack formation in materials under the causal influence of vibrations . The occurrence of this corrosion depends on the stress and usually occurs above a specific limit value. The vibration crack corrosion occurs suddenly and is usually not visible from the outside. It differs depending on the type of stress of the device: Corrosion fatigue by repeated bending stress , by rotating bending stress (such as bending-loaded rotating shafts.) And torsional vibration (= torsional vibrations ). The intensity of the vibration crack corrosion depends - apart from the level and frequency of the load - on the one hand on the material composition, the structural condition of the material, the surface condition and treatment of the component, and on the other hand on the so-called corrosion medium surrounding the component , e.g. B. acidic , basic , salts , gases containing (especially aqueous) liquids, corrosive gases and vapors . Movement (static or flowing) and temperature of these corrosion media also play a not insignificant role. An electrochemical potential (possibly) applied to the component can have a protective effect against vibration corrosion cracking.
literature
- F. Dehn, G. König, G. Marzahn: Construction materials in building . Ernst & Sohn, Berlin 2003, ISBN 978-3-433-01652-7 , p. 195.
- Günter Wossog (Ed.): Handbook of pipeline construction. 2nd edition, Vulkan Verlag, Essen 2003, ISBN 3-8027-2723-1 , pp. 879, 880.
See also
Web links
- Contribution to the understanding of the vibration corrosion cracking of austenitic steels (accessed on September 7, 2018)
- Corrosion damage analysis (accessed September 7, 2018)
- Computer-aided damage analysis using the example of corrosion (accessed on September 7, 2018)
- Recent results of scanning electron microscopic fractography (accessed on September 7, 2018)
- Corrosion resistance of stainless steel (accessed September 7, 2018)