| WANG Li-sheng,LIN Tao,HOU Ting,SHAO Hui-ping,GUO Zhi-meng.Microstructure and Corrosion Behavior of Hot Dipping Ni-based Alloy Coating[J],39(5):19-21,25 |
| Microstructure and Corrosion Behavior of Hot Dipping Ni-based Alloy Coating |
| Received:July 13, 2010 Revised:October 10, 2010 |
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| DOI： |
| KeyWord:hot dipping Ni-based alloy coating structure corrosion resistance corrosion mechanism |
| Author | Institution |
| WANG Li-sheng |
University of Science and Technology Beijing, Beijing , China |
| LIN Tao |
University of Science and Technology Beijing, Beijing , China |
| HOU Ting |
University of Science and Technology Beijing, Beijing , China |
| SHAO Hui-ping |
University of Science and Technology Beijing, Beijing , China |
| GUO Zhi-meng |
University of Science and Technology Beijing, Beijing , China |
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| Abstract: |
| Ni-based alloy coating was prepared by hot dipping on Q235 steel.Before and after corrosion, the phases and the microstructures of the coating were investigated by XRD and SEM-EDS, respectively, and the mechanism of corrosion of the coating was discussed. The results show that there are many forms of the precipitates in the coating. The width of transition zone is 5～ 8μm. The corrosion products of the coating are Ni(OH)2,Fe3O4and Fe+ 3O(OH). And the average corrosion rate of hot dipped Ni-based alloy is about 1.18× 10- 7 g/(h·mm2). Due to the different corrosion potentials of the alloy elements and the non-homogeneous structures, the corrosion is characterized of local corrosion, which first occurres around pores and the borders of precipitates. |
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