Microstructural, electrochemical and localized corrosion characterization of the AA2198-T851 alloy
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2020
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In the present work, the microstructure, electrochemical behavior and localized corrosion of the AA2198-T851 Al-Cu-Li alloy were studied. The microstructure was correlated with corrosion results obtained by immersion, gel visualization and scanning electrochemical microscopy (SECM) tests. Immersion and gel visualization tests showed high kinetics of corrosion attack during the first hours of immersion. SECM analyzes by means of surface generation/tip collection (SG/TC) mode detected hydrogen evolution generated during spontaneous corrosion from severe localized corrosion (SLC) sites on the metal surface. SECM results revealed sites of intense hydrogen evolution after 2 h of immersion and increased amounts of corrosion products after 4 h of immersion. Hydrogen evolution sites detected by SECM were associated with severe localized corrosion (SLC).
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ARAUJO, JOAO V. de S.; SILVA, REJANE M.P. da; DONATUS, UYIME; MACHADO, CARULINE de S.C.; COSTA, ISOLDA. Microstructural, electrochemical and localized corrosion characterization of the AA2198-T851 alloy. Materials Research, v. 23, n. 4, p. 1-10, 2020. DOI: 10.1590/1980-5373-MR-2020-0161. Disponível em: http://200.136.52.105/handle/123456789/31630. Acesso em: 24 Apr 2024.
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