Skip to Main content Skip to Navigation
Journal articles

Transition from intergranular to pitting corrosion in fine grained aluminum processed by equal channel angular pressing

Abstract : Equal Channel Angular Pressing (ECAP) is used to improve the strength of metallic materials by grain refinement. Moreover, extensive applications become possible by combining high strength with good surface properties. In the present work, the effect of ECAP on the corrosion behavior of aluminum was investigated in a 3% NaCl medium. From electrochemical experiments, microscopic and topographic observations, we have shown that, corrosion is mainly intergranular in the coarse grained material. After ECAP, a clear pitting is observed. We related this to a destruction of the preexisting grain boundaries and to the homogenization of the microstructure achieved by ECAP.
Document type :
Journal articles
Complete list of metadatas

https://hal-centralesupelec.archives-ouvertes.fr/hal-01237729
Contributor : Catherine Kruch <>
Submitted on : Thursday, December 3, 2015 - 4:38:41 PM
Last modification on : Wednesday, July 1, 2020 - 4:30:04 PM

Identifiers

Collections

Citation

Oussama Jilani, Nabil Njah, Pierre Ponthiaux. Transition from intergranular to pitting corrosion in fine grained aluminum processed by equal channel angular pressing. Corrosion Engineering, Science and Technology, Maney Publishing, 2014, 87, pp.259 - 264. ⟨10.1016/j.corsci.2014.06.031⟩. ⟨hal-01237729⟩

Share

Metrics

Record views

105