CORROSION MECHANISMS IN AMORPHOUS
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CORROSION MECHANISMS IN AMORPHOUS SOLID SOLUTION ALLOYS: Role(s) of Minor Alloying Elements J ohn R. Scully, University of Virginia Main Campus, DMR 0906663. [1] Dissolved disordered fcc Fe 50 Pd 50.

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1 dissolved disordered fcc fe 50 pd 50

CORROSION MECHANISMS IN AMORPHOUS SOLID SOLUTION ALLOYS: Role(s) of Minor Alloying ElementsJohn R. Scully, University of Virginia Main Campus, DMR 0906663

[1] Dissolved disordered fcc Fe50Pd50

  • Atom scale structure and minor solute exert strong effects on the corrosion properties of ideal solid solution alloys

  • The effects of structural (order–disorder transformation, glass relaxation), chemical (solute clusters, minor solute elements) and structural + chemical defects (solute rich and lean nanocrystals in an amorphous solid solution) on corrosion are investigated using model alloys.

  • Disordered crystalline Fe50Pd50: The disordered structure has strong grain orientation dependent dissolution [1] even after large amounts of dissolution [2]. Dissolution behavior is dominated by the dissolution of irrational orientations producing high surface roughness caused by significant faceting to low index planes.

  • - The formed terrace-ledge structure was maintained in individual grains after increased dissolution. These observations are consistent with dissolution eventually revealing slow dissolving low index terraces and steps. Further dissolution proceeds most rapidly laterally on the ledge and kink facets.

6

400 s

5

1

4

2

3

2

4

5

6

Key result: Dissolution depth linearly dependent on plane normal angle from {100} and {111}

1

3

{100}

{111}

[2] Behavior after increased dissolution

Most dissolved orientations have highest roughness

increased

surface

faceting

Near {100}


1 dissolved disordered fcc fe 50 pd 50

CORROSION MECHANISMS IN AMORPHOUS ALLOYS: CRITICAL COMPOSITIONAL AND STRUCTURAL DEFECTS FOR LOCAL CORROSION John R. Scully, University of Virginia Main Campus, DMR 0906663

Spatio-temporal Chaos in Systems of Broken SymmetryEberhardBodenschatz, Cornell University, DMR Award#0072077

(Title) IIName, Institution, DMR Award#

  • Corrosion Education

  • 6 high school students (M. Fox, S. Gorsch, L. Scully, D. Harrington, S. Gorsch, A. Clyman), 3 Undergraduates (H. Bindig, W. McCarthy, A. Nguyen), 3 graduate students (T. Aburada, N. Tailleart D. Horton), and 2 post-doctoral researchers (H. Ha, D. Horton) contributed to this NSF-supported project.

  • Graduate & undergraduate courses in corrosion taught both in class and via distance learning (both MSE 7080 and MSE 3080) for Produced-in-Virginia for Engineers that bring engineering education to workers.

  • John R. Scully served on National Academy Study on Research Opportunities In Corrosion (ROCSE). (Fall 2010). Corrosion Video distributed

H. Bindig, Runner-up – 2011 Individual Undergraduate Research and Design Symposium

  • Outreach

  • NanoDays participation with nano-scale corrosion applications at local schools and museums

  • cKITs (a set of corrosion experiments) purchased from National Association of Corrosion Engineers supplied to local K-12 schools

  • Materials science and engineering demonstrations and lab tours are given in UVa MSE to foster an interest in the physical sciences and materials science.

Awards and Honors

  • Nicole Tailleart, John R. Scully: Inaugural Award Recipients of the Corrosion Journal Best Paper Award, "User-selectable Barrier, Sacrificial Anode, and Active Corrosion Inhibiting Properties of Al-Co-Ce Alloys for Coating Applications." NACE Inter. Conference, 2010.

  • UVA's Center for Electrochemical Science and Engineering received the 2009 NACE Distinguished Organization Award

  • John R. Scully: became the Technical Editor of Corrosion (2012) and received the W.R. Whitney 2012 award from NACE for significant contributions to corrosion science and the H.H. Uhlig Award, 2009 of the Electrochemical Society for excellence in corrosion research.

  • Tomohiro Aburada was one of twelve invited students internationally to present at Gordon Research Seminar, New London, NH 2010.

  • Derek Horton was one of fifteen invited students internationally to present at Gordon Research Seminar, New London, NH 2012.

  • H. BindigNace Top Undergraduate NACE Poster Award 2011 and Runner-up in the 2011 Individual Undergraduate Research and Design Symposium selected from 1300 graduating UVA engineers


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