Galvanic corrosion of aluminium-copper model alloys
Résumé
Galvanic coupling between different α and θ phase-containing model Al-Cu alloys, deposited by magnetron sputtering, has revealed that the anodic α phase did not suffer corrosion and remained in the passive state in sulphate solution. Conversely, sulphate ions induced pitting of the cathodic θ phase. Pitting susceptibility of the cathode increased when the difference between the copper content of the anode and cathode increased. Similar observations were made for all the galvanic couples; further, the higher the copper content of a phase, then the greater its susceptibility to pitting.
Domaines
Matériaux
Origine : Fichiers produits par l'(les) auteur(s)
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