Influence of Multi-Pass Friction Stir Processing on the Corrosion Behavior of an Al-Mg-Si Alloy
Artikel i vetenskaplig tidskrift, 2016

The effect of multi-pass (100% overlap) friction stir processing (FSP) on the NaCl-induced atmospheric corrosion behavior of an extruded 6005-T6 aluminum alloy has been studied. Samples were contaminated with 70 and 200 mu g/cm(2) NaCl and exposed in the presence of 400 ppm CO2 for a time interval of 200-3200 h. The results showed that increasing the number of passes gives rise to several crucial changes in the microstructure of the processed regions. Gravimetric analyses and morphological inspections of the corroded samples revealed that multi-pass FSP has also a significant impact on the NaCl-induced atmospheric corrosion behavior of the FS processed samples. While increasing the number of FSP passes resulted in a reduced extent of pitting corrosion in the stir zone, it induced a significant pitting corrosion attack in the heat affected zone of the samples, which were shown to be linked to a reduction in the size of intermetallic particles in the stir zone of the multi-pass FSP specimens. The results also showed that the cathodic activity of intermetallic particles in this family of Al alloys is size-dependent. (C) The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. All rights reserved.

Aa6082 Alloys

Microstructural Evolution

Welds

Tensile Properties

Mechanical-Properties

Atmospheric Corrosion

Stainless-Steel

Aluminum-Alloys

Intermetallic Phases

Crystal-Structure

Författare

Mohsen Esmaily

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Nooshin Mortazavi Seyedeh

Chalmers, Fysik, Biologisk fysik

W. Osikowicz

Sapa Technology

H. Hindsefelt

Sapa Technology

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Mats Halvarsson

Chalmers, Fysik, Biologisk fysik

G. E. Thompson

University of Manchester

Lars-Gunnar Johansson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Journal of the Electrochemical Society

0013-4651 (ISSN)

Vol. 163 C124-C130

Ämneskategorier

Kemiska processer

Korrosionsteknik

DOI

10.1149/2.1091603jes