Digital modelling of the galvanic corrosion behaviour of a self–piercing riveted AZ31 ‐ AA5083 hybrid joint: Digitale Modellierung galvanischer Korrosion an stanzgenieteten AZ31‐AA5083 Hybridverbunden. Issue 6 (June 2017)

• Record Type: Journal Article
• Authors: Silva, E. L.; Höche, D.; Bouali, A. C.; Serdechnova, M.; Sesenes, R. L.; Scholz, C. S.; Zheludkevich, M. L.
• Is Part Of: Materialwissenschaft und Werkstofftechnik. Volume 48:Issue 6(2017)
• Page Start: 529
• Page End: 545
• Publication Date: 2017-06
• Subjects: Galvanic corrosion -- corrosion simulation -- multi-material joints -- self-piercing riveting -- AA5083 -- magnesium AZ31; Galvanische Korrosion -- Korrosionssimulation -- Multimaterialfügen -- Stanznieten -- AA5083 -- Magnesium AZ31; Materials -- Periodicals; Materials -- Testing -- Periodicals; 620.1
• DOI: 10.1002/mawe.201600702
• Languages: English
• ISSNs: 0933-5137

Abstract

Abstract: This study focuses on the corrosion phenomena occurring between aluminium AA5083 and AZ31 magnesium sheets, joined with a coated steel self‐piercing rivet, by punch rivet technology. These assemblies were studied by immersion tests and scanning vibrating electrode technique (SVET) in sodium chloride solutions, in order to evaluate the effects of joint geometry on corrosion resistance. The observed results were also used for validation of transient finite element method (FEM) simulations. A fully coupled continuum model was used to compute the evolution of electrochemically and chemically induced corrosion attack, formation of corrosion products and their influence on the overall system kinetics. Additionally, X‐ray diffraction (XRD) analysis of the corrosion products provided evidence for the formation of layered double hydroxides (LDH), which is in accordance with the model outputs. The current study targets the optimization of joint setup for corrosion resistance. The suitability of corrosion simulation for the AZ31‐AA5083‐Almac ternary galvanic system is shown alongside. The developed modelling approach represents a step forward in terms of digital service‐life assessment of multi‐material joints.