The effect of the change in the microscopic structures of the iron on corrosion resistance and passivated properties |
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Authors: | Lv Jinlong Hongyun Luo |
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Institution: | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, , Beijing, China, 100191 |
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Abstract: | The passive film of iron showed n‐type semiconductor characteristic in borate buffer solution, and its donor concentration increased slightly after tensile strain in the present study. However, comparing with solution‐annealed sample, the anodic passive film formed on tensile‐strained one was highly protective. The more dislocations on tensile‐strained sample promoted the diffusion of iron and oxygen vacancy. Moreover, more donor density (mainly oxygen vacancies) promoted the diffusion of oxygen. They all facilitated tensile‐strained sample to form Fe2O3 and thicker passive film on the surface. More Fe2O3 and thicker passive film on the surface of tensile‐strained iron could improve corrosion resistance. Copyright © 2014 John Wiley & Sons, Ltd. |
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Keywords: | iron EIS polarization Raman spectroscopy passive films |
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