- Metzger, M.
- Washington, D.C. : National Advisory Committee for Aeronautics, [1955]
- Description
- Book — 33 p. : ill ; 27 cm.
- Summary
-
The variation in the rate of intergranular corrosion of single-phase high-purity aluminum in 20 percent hydrochloric acid as a function of iron content and final-annealing temperature is attributed to the segregation to atomic sites in the grain-boundary region of iron and possibly other impurity atoms. The experimental results are analyzed by reference to a distribution function, obtained by statistical mechanical methods, which gives the quilibrium fraction of certain sites in the boundary which ar eoccupied by solute atoms in terms of the interaction energy for the segregation of the solute atoms at these sites. Segregation of iron alone cannot account for the observed results; from consideration of the atomic sizes and the quantities of other impuritiies prent, it is expected that copper is also involved. The observed relative corrosion rates can be represented as due principally to differences in the fraction occupied by iron and copper atoms of those boundary sites where the potential energy of interaction for the segregation of iron or copper is at least as large as -0.7 electron volt and perhaps as large as -1.0 electron volt.
- Online
SAL3 (off-campus storage)
SAL3 (off-campus storage) | Status |
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Some records bound together | |
See full record for details | |
Stacks | |
NACA TN 3282 | Unknown |