Localized corrosion of 2024 alloy: structure and composition of oxide films grown on model alloys representative of the different metallurgical phases

摘要

Structure and composition of passive films grown on model alloys representative of the metallurgical phases present in AA2024-T351 alloy were determined. It was found that copper enters the passive films formed on the different metallurgical phases (matrix or intermetallics). The other alloying elements (Fe and Mg) can also be introduced into the passive films which might explain the differences in the electrochemical behavior for all these phases.