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On the pitting corrosion behavior of ultrafine‐grained aluminum processed by ECAP: A statistical analysis
Author(s) -
Quartiermeister Marcelo V.,
Magalhães Danielle C. C.,
Vacchi Guilherme S.,
Braga Diogo P.,
Silva Rodrigo,
Kliauga Andréa M.,
Sordi Vitor L.,
Rovere Carlos A. D.
Publication year - 2020
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201911293
Subject(s) - materials science , intermetallic , metallurgy , aluminium , pitting corrosion , corrosion , pressing , statistical analysis , dispersion (optics) , composite material , alloy , mathematics , statistics , physics , optics
The effect of the equal‐channel angular pressing (ECAP) process on the pitting corrosion behavior of ultrafine‐grained aluminum was evaluated based on statistical analysis. The microstructural evolution, mechanical properties, and corrosion behavior were investigated. ECAP breakdowns/redistributes intermetallic particles, which contributes to a decrease in the local chemical heterogeneity. Higher average pitting potential ( E pit ) values were observed after processing, but this improvement was neither significant nor sequential with each ECAP pass. Finally, the statistical analysis of the data and their dispersion did not lead to the conclusion that ECAP improves the corrosion resistance of aluminum, in view of the widely varying E pit values observed.