Course Syllabi
MATE 202, Intro to Materials Science, Fall 2008
ES 302, Mechanics of Materials, Fall 2008
Figure 1: 1010 steel sheet anodized in one minute steps. From Burleigh et al, "Anodizing Steel in KOH and NaOH Solutions," Journal of the Electrochemical Society, 154, 10, p. C579-586. (AnodizedJECS2007.pdf) |
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Figure 3: The polished, etched and heat-tinted face of the Gibeon Meteorite shows a crystal
pattern denoting a cooling rate of 1 C per million years (from the Materials and Metallurgical Engineering
Department Brochure).
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Figure 4: A schematic of the photoelectrochemical apparatus used for measuring photocurrents and
photovoltages on metals immersed in a liquid. J.R. Birch and T.D. Burleigh,
"Oxides Formed on Titanium by Polishing, Etching, Anodizing, or Thermal Oxidizing," Corrosion (2000), 56, 12, 1233-1241.
(BirchBurleigh2000.pdf)
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Figure 5: The photocurrents are result from light exciting electrons in the oxide film, in the presence of a
Schottky barrier. The electrons are excited from the valence band (V.B.) to the conduction band (C.B.)
where they flow down hill under the influence of the electric field. The electric field is a result of the
mismatch of the Fermi levels of the electrolyte and the metal.
J.R. Birch and T.D. Burleigh, "Oxides Formed on Titanium by Polishing, Etching, Anodizing, or
Thermal Oxidizing," Corrosion (2000), 56, 12, 1233-1241.
(BirchBurleigh2000.pdf)
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Figure 6: The active-passive transition of may be modeled as a semiconductor film that becomes degenerate at
high or low potentials. During degeneracy, the conduction or valence bands bend across the Fermi level and the
oxide becomes an electric conductor. from T.D. Burleigh, "Anodic Photocurrents and Corrosion Currents on
Passive and Active-Passive Metals," Corrosion (1989), 45, 6, 464-471
(Corrosion1989.pdf)
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Figure 7: The tarnishing of silver requires an atmosphere containing hydrogen sulfide, oxygen and water vapor.
A electrochemical mechanism is proposed for the tarnishing of silver.
T.D. Burleigh, Y. Gu, G. Donahey, M. Vida, D.H. Waldeck,
“Tarnish Protection of Silver using a Hexadecanethiol Self-Assembled Monolayer and Descriptions of
Accelerated Tarnish Tests,” Corrosion (2001), 57, 12, 1066-1074.
(BurleighWaldeck2001.pdf)
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Figure 8: The electrochemical corrosion of steel under a drop of water. Two separate chemical reactions
occur under a drop of water. The iron dissolution releases electrons, which migrate through the metal to
another location, where the electrons react with oxygen and water to form hydroxyls (OH-).
These hydroxyls migrate through the water, and react with the ferrous ions and precipitate. (from T.D. Burleigh's
course notes, "Introduction to Corrosion."
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Figure 9: A corrosion chimney forms above the corroding pit on aluminum corroding in saltwater.
T.D. Burleigh, E. Ludwiczak, and R.A. Petri, "Intergranular Corrosion of an Al-Mg-Si-Cu Alloy,"
Corrosion (1995), 51, 1, 50-55. (Corrosion1995.pdf)
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Figure 10: Silver may be protected from tarnishing by a self-assembled monolayer (SAM) of hexadecanethiol. The SAM is
prepared by cleaning, etching, rinsing, then immersion in a thiol solution for a certain time period. Too short of time
leads to an incomplete film, and too long of time leads to pinhole corrosion.
Figure 10b from
T.D. Burleigh, Y. Gu, G. Donahey, M. Vida, D.H. Waldeck,
“Tarnish Protection of Silver using a Hexadecanethiol Self-Assembled Monolayer and Descriptions of
Accelerated Tarnish Tests,” Corrosion (2001), 57, 12, 1066-1074.
(BurleighWaldeck2001.pdf)
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Figure 11: Zinc corrodes faster under UV illumination. E.A. Thompson and T.D. Burleigh,
"Accelerated Corrosion of Zinc Alloys Exposed to Ultraviolet Light," Corrosion Engineering,
Science and Technology (2007), 42, 3, p. 237-241.
(Zinc & UV.pdf).
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Figure 12: A corrosion resistant Mg-Li alloy is made by alloying with scandium.
T.D. Burleigh, R.K. Wyss, "Dual Phase Magnesium Based Alloy having Improved Properties,"
U.S. Patent No. 5,059,390 (October 22, 1991).
(MgLiSc.pdf)
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Figure 13: Improvement in the erosion corrosion resistance of Cu-10%Ni was achieved by adding indium.
T.D. Burleigh and D.H. Waldeck, "Effect of Alloying on the Resistance of Cu-10% Ni Alloys to
Seawater Impingement," Corrosion (1999), 55, 8, 800-804.
(Corrosion1999.pdf)
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