Metallurgical aspects of corrosion resistance of aluminium alloys |
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Authors: | M C Reboul B Baroux |
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Affiliation: | 1. Pechiney Voreppe Research Centre France (Now RIO TINTO ALCAN Voreppe Research Centre) (France);2. CNRS‐INP Grenoble, SIMAP‐INP Grenoble, Université France, 1130 rue de la piscine, BP 75 ‐ 38402 Saint Martin d' Hères Cedex (France)Now retired.;3. SIMAP‐INP, Grenoble University, 1130 rue de la piscine, BP 75 ‐ 38402 Saint Martin d' Hères Cedex (France) |
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Abstract: | Aluminium is the second most often used metal after steel. In this paper, the most current uses of aluminium alloys are first summarised. Then, their different corrosion modes, i.e. pitting, crevice, filiform, galvanic and structural corrosion (including inter‐granular, exfoliation and stress corrosion cracking) are reviewed, with particular attention paid to metallurgical factors controlling the corrosion process. For each mode, some instances of possible in‐service failure are given, followed by the discussion of the involved mechanisms and the presentation of appropriate solutions to prevent corrosion. Last, passivity and polarisation behaviour are discussed with reference to stainless steels. |
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Keywords: | aluminium pitting crevice filiform galvanic intergranular exfoliation SCC |
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