Corrosion of Magnesium in Multimaterial System
Corrosion of Magnesium in Multimaterial System
VINEET V. JOSHI 0
SEAN AGNEW 0
0 1.-Pacific Northwest National Laboratory , Richland, WA 99352 , USA. 2.-Department of Materials Science and Engineering, University of Virginia , Charlottesville, VA, USA. 3.-
in this special topic address the various aspects associated with understanding the mechanism of corrosion in magnesium-based alloys in multimaterial systems. In the first paper titled ''Evolution of the Corrosion Morphology on AZ31B Tracked Electrochemically and by In Situ Microscopy in ChlorideContaining Media,'' M.A. Melia et al. describes in real time using an in situ optical technique the propagation of the corrosion filaments on the AZ31 alloy magnesium surface. The reader is highly advised to see the supplemental videos that describe the details of corrosion propagation in the article as a function of the surface potential. In the second article by B.G. Bazehhour et al. titled ''Role of Static and Cyclic Deformation on the Corrosion behavior of a Magnesium-Steel Structural Joint,'' the influence of monotonic and cyclic deformation on the corrosion behavior of a galvanic joint formed between AE44 magnesium alloy and mild steel is examined. The authors of this work used multiphysics modeling to identify and describe the detrimental physical phenomenon that undermines the structural integrity of the joints under various loading scenarios. The third article by J.R. Kish et al. is titled ''Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints.'' This article is a part of the large multinational efforts related to the Mg alloyintensive, automotive, front-end research and development project. A scanning vibrating electrode technique (SVET) was used to determine the galvanic activity across the joint. This work is particularly interesting as the authors try to understand the mechanism of corrosion caused by the difference in microstructures resulting from the joining process. The articles are published under the topic ''Corrosion of Magnesium in Multimaterial Systems'' in the November 2017 issue (vol. 69, no. 11) of JOM and can be accessed via the JOM page at http://link. springer.com/journal/11837/69/11/page/1.
The TMS Magnesium Committee has been
actively involved in presenting cutting-edge
research and development and the latest trends
related to magnesium and its alloys to industry and
academia. Topics including magnesium alloy
development, applications, mechanism of deformation
and corrosion, thermomechanical processing,
modeling, and so on have been captured year after year
through the Magnesium Technology symposium
and conference proceedings at TMS and through
special issues in JOM. Every year, based on the
unanimous endorsement from the industry and
academia, a topic is selected to address the latest
developments within this subject in JOM. In
continuation with last year’s topic on advances and
achievements in in-situ analysis of corrosions and
structure–property relationship in Mg alloys,1 this
year’s topic focuses on the corrosion of magnesium
in multimaterial systems. Magnesium, the lightest
of all the structural materials, has garnered a lot of
interest in the transportation, electronics
packaging, and industries alike and is more commonly
being incorporated in multimaterial design
concepts.2–4 Nevertheless, the application of the same
is limited because of its highly corrosive nature, and
understanding and mitigating the corrosion of
magnesium has been a major research challenge.
The research community has made significant
advances in understanding the mechanism of
corrosion, more specifically, looking at macro and micro
galvanic corrosion, the evolution of hydrogen, and
coatings and film formation on magnesium alloys. A
lot of attention has also been focused on looking at
the interfaces when it comes to multimaterial
systems using a new suite of advanced
characterization techniques, setting up novel electrochemical
cells and by use of multiphysics models.5–9
Significant collaborative efforts between nations are also
underway to address this issue.10 The three articles
Vineet V. Joshi and Sean Agnew are the JOM advisors for the Magnesium
Committee of the TMS Light Metals Division, and guest editors for the
topic Corrosion of Magnesium in Multimaterial Systems in this issue.
‘‘Evolution of the Corrosion Morphology on
AZ31B Tracked Electrochemically and by In
Situ Microscopy in Chloride-Containing Media’’
by M.A. Melia, T.W. Cain, B.F. Briglia, J.R.
Scully, and J.M. Fitz-Gerald
‘‘Role of Static and Cyclic Deformation on the
Corrosion behavior of a Magnesium–Steel
Structural Joint’’ by B. Gholami Bazehhour, I.
Adlakha, and K.N. Solanki
‘‘Corrosion Performance of Friction Stir Linear
Lap Welded AM60B Joints’’ by J.R. Kish, N.
Birbilis, E.M. McNally, C.F. Glover, X. Zhang,
J.R. McDermid, and G. Williams.
1. D. Orlov and V. Joshi , JOM 68 , 3040 ( 2016 ).
2. T. Skszek , Demonstration Project for Multi-Material Lightweight Prototype Vehicle as Part of the Clean Energy Dialogue with Canada-Vehma International of America, Inc . and Ford Motor Company, FY2014 Annual Progress Report-Lightweight Materials R &D, pp. 238 - 262 . http:// energy.gov/sites/prod/files/2015/07/f24/DOE%20VTO% 2020 14% 20Materials%20Annual%20report .pdf.
3. T. Skszek , J. Conklin , D. Wagner , and M. Zaluzec , MultiMaterials Lightweight Vehicles, U.S. DOE 2015 Annual Merit Review Presentation ( 2015 ). http://energy.gov/sites/ prod/files/2015/06/f24/lm072_skszek_ 2015 _o .pdf.
4. A.A. Luo , JOM 54 , 42 ( 2002 ).
5. W.H. Sillekens , D. Casari , W.U. Mirihanage, S. Terzi , R.H. Mathiesen , L. Salvo , R. Daudin , P. Lhuissier , E. Guo, and P.D. Lee , JOM 68 , 3042 ( 2016 ).
6. D. Tolnai , R.H. Buzolin , F. D'Elia , T. Subroto , S. Gavras , A. Stark , N. Schell , K.U. Kainer , and N. Hort , JOM 68 , 3051 ( 2016 ).
7. A. Vinogradov and K. Ma´this, JOM 68 , 3057 ( 2016 ).
8. A. Milenin , P. Kustra , D. Byrska-Wo´jcik, O. Grydin , M. Schaper , T. Mentlein , G. Gerstein, and F. Nu ¨ rnberger , JOM 68 , 3063 ( 2016 ).
9. A.R. Headand and J. Schnadt , JOM 68 , 3070 ( 2016 ).
10. J.H. Forsmark , M. Li , D.A. Wagner , J. Zindel , A.A. Luo , J.F. Quinn , R. Verma , Y.M. Wang , S.D. Logan , and R.C. McCune , Magnesium Technology 2014 , ed. M. Alderman , M.V. Manuel , N. Hort , and N.R. Neelameggham (Warrendale, PA: The Minerals , Metals & Materials Society; Hoboken, NJ: John Wiley & Sons, 2014 ), pp. 517 - 524 .