17.28 For each of the metals listed in the following + table, compute the Pilling-Bedworth ratio. Also, on the basis of this value, specify whether you would expect the oxide scale that forms on the surface to be protective, and then justify your decision. Density data for both the metal and its oxide are also tabulated. Metal Density (g/cm) Oxide Density (g/cm) Metal Metal Oxide Mg 1.74 MgO 3.58 V 6.11 3.36 Zn 7.13 ZnO 5.61

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Oxidation
17.28 For each of the metals listed in the following
O table, compute the Pilling-Bedworth ratio. Also,
on the basis of this value, specify whether you
would expect the oxide scale that forms on the
surface to be protective, and then justify your
decision. Density data for both the metal and its
oxide are also tabulated.
Metal
Density
(g/cm³)
Metal
Oxide
Oxide
Density
(g/cm³)
Metal
Mg
1.74
MgO
3.58
V
6.11
V,O5
3.36
Zn 7.13
ZnO
5.61
Transcribed Image Text:Oxidation 17.28 For each of the metals listed in the following O table, compute the Pilling-Bedworth ratio. Also, on the basis of this value, specify whether you would expect the oxide scale that forms on the surface to be protective, and then justify your decision. Density data for both the metal and its oxide are also tabulated. Metal Density (g/cm³) Metal Oxide Oxide Density (g/cm³) Metal Mg 1.74 MgO 3.58 V 6.11 V,O5 3.36 Zn 7.13 ZnO 5.61
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