| WANG Sheng-gang,SUN Miao,LONG Kang,ZHANG Zhi-dong.Research Progress in Corrosion Performance of Bulk Nanocrystalline Metal Materials Prepared by Severe Rolling Technique[J],44(3):81-88 |
| Research Progress in Corrosion Performance of Bulk Nanocrystalline Metal Materials Prepared by Severe Rolling Technique |
| Received:October 11, 2014 Revised:March 20, 2015 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2015.03.014 |
| KeyWord:severe rolling technique bulk nanocrystalline metal plates electrochemical corrosion valence electrons configuration the electronic structures of oxide film |
| Author | Institution |
| WANG Sheng-gang |
1. Shenyang National Laboratory for Materials Science, Shenyang , China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
| SUN Miao |
1. Shenyang National Laboratory for Materials Science, Shenyang , China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
| LONG Kang |
Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
| ZHANG Zhi-dong |
1. Shenyang National Laboratory for Materials Science, Shenyang , China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
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| Abstract: |
| The research progresses in the production techniques of nanocrystalline metal materials and the corrosion properties of different nanocrystalline metal materials were overviewed in this paper. The severe rolling technique for producing bulk nanocrystlline metal materials and the corrosion properties of bulk nanocrystalline metal materials (ingot iron, 304 stainless steel and pure Al) prepared by this technique were introduced in this paper. The corrosion resistances (localized corrosion and uniform corrosion) of bulk nanocrystalline metal materials (ingot iron, 304 stainless steel and pure Al) prepared by severe rolling technique were enhanced in comparison with their conventional polycrystalline counterparts in different corrosive environments (solutions, molten salts and gas at high temperature). According to the massive experimental results of electrochemical corrosion about nanocrystalline metal materials and their conventional polycrystalline counterparts, the conventional parameters for material microstructures (composition and distribution of elements, grain size, dislocation density and residual stress et al. ) are not the intrinsic parameters for electrochemical corrosion of metal materials. In addition, the authors proposed to understand the corrosion properties and corrosion mechanisms of metal materials from the view of valence electrons configurations of metal materials and the electronic structures of oxide film. Besides, on the basis of the present results about electrochemical corrosion of bulk nanocrystalline metal materials, the authors proposed the concept of intrinsic parameters for electrochemical corrosion of metal materials. |
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