Paper Title:
Corrosion Characteristics of an Ultrafine-Grained Al-Mg-Si Alloy (AA6082)
  Abstract

The corrosion behaviour of the aluminium alloy, AA6082, processed by equal-channel angular pressing (ECAP) after different passes (route E, room temperature) was studied in comparison to the coarse-grained counterpart. The results of the electrochemical investigations (cyclovoltammetry; electrochemical impedance spectroscopy, EIS) are presented in correlation with the microstructure before and after the corrosion examinations. Both, chemical (precipitations, phases) and physical (dislocations, high-angle grain boundaries, grain size, low-angle grain boundaries) inhomogeneities characterize the microstructure of this commercially used Al-Mg-Si alloy. Results indicate an improved resistance against pitting of the ECAP material expressed by a reduced pitting density of up to 50 % and lower pit depths. EIS measurements and microstructural examinations (scanning electron microscopy, transmission electron microscopy, 3D topography measurement) confirm that ECAP modifies the number, size and distribution of these inhomogeneities, which leads to a more favourable corrosion behaviour.

  Info
Periodical
Materials Science Forum (Volumes 584-586)
Edited by
Yuri Estrin and Hans Jürgen Maier
Pages
988-993
DOI
10.4028/www.scientific.net/MSF.584-586.988
Citation
B. Wielage, D. Nickel, T. Lampke, G. Alisch, H. Podlesak, S. Darwich, M. Hockauf, "Corrosion Characteristics of an Ultrafine-Grained Al-Mg-Si Alloy (AA6082)", Materials Science Forum, Vols. 584-586, pp. 988-993, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Christopher M.A. Brett, Heloísa A. Acciari, Antonio C. Guastaldi
463
Authors: T. Monetta, M. Montuori, Antonio Squillace, Francesco Bellucci
Abstract:The current research has assessed the correlation between welding parameters and corrosion behaviour for friction stir welded 6056 aluminium...
285
Authors: Antonio Forn, Isabel Espinosa, Maite T. Baile, Elisa Rupérez
Abstract:Semi solid processing reduces porosity and amount of trapped gas and it allows heat treatment T6 that improves a hard anodized oxide layer....
755
Authors: Su Qiu Jia, Guo Jun Liu, Qi Shuang Chen
Abstract:Mg-7.3Al magnesium alloys were investigated in the paper. The paper presents microstructural characterization of Mg-7.3Al alloy after casting...
585
Authors: Er Chao Ding, Zhen Yong Man, Xin Xin Yang, Jing Tai Zhao
Chapter 2: Materials and Alloys
Abstract:The effects of heat treatment on microstructure and corrosion resistance of Ni-Cr-Mo-Fe nickel-based alloys were investigated by X-ray...
773