Electrochemical behaviour of aluminium/steel rivet joints |
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Authors: | L Krüger M Mandel |
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Affiliation: | Technische Universität Bergakademie Freiberg, Institut Für Werkstofftechnik, Gustav-Zeuner Straße 5, 09599 Freiberg, Germany |
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Abstract: | The galvanic corrosion behaviour of a rivet joint of two sheets of the aluminium alloys EN AW-6014-T4 and EN AW-6082-T5 joined by an electrogalvanized steel blind rivet was investigated. The potentiodynamic polarization curves in a 5 wt.% NaCl solution show a potential reversion of the anodic and cathodic regions of the rivet joint. The surface potential was investigated with a capillary electrode before and after corrosion. From the measurements by the capillary electrode and SEM-observations an improved resistance against galvanic corrosion is expected after the dissolution of the zinc layer of the blind rivet. |
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Keywords: | A Aluminium A Alloy A Mild steel B Polarization B SEM |
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