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| Corrosion Behaviors of Several Kinds of Stainless Steel and Nickel in High Temperature Alkali Solutions |
| Received:August 19, 2016 Revised:January 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.01.003 |
| KeyWord:stainless steel nickel high temperature alkali solution corrosion |
| Author | Institution |
| YIN Hua-min |
Materials Science and Engineering, College of Science, Naval University of Engineering, Wuhan , China |
| LI Guo-ming |
Materials Science and Engineering, College of Science, Naval University of Engineering, Wuhan , China |
| CHEN Shan |
Materials Science and Engineering, College of Science, Naval University of Engineering, Wuhan , China |
| LIU Ya-qiang |
Materials Science and Engineering, College of Science, Naval University of Engineering, Wuhan , China |
| MENG Ling-dong |
Materials Science and Engineering, College of Science, Naval University of Engineering, Wuhan , China |
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| Abstract: |
| To reduce severe corrosion of alkali production equipment in evaporation and concentration of alkali solution. Methods Static immersion, electrochemical static polarization measurement technology, optical microscope and scanning electron microscope were used for observation. Test methods such as XRD, XPS corrosion product analysis, etc. were used to analyze corrosion behaviors of several kinds of materials (26-1, 30-2, 18-8Ti and Ni) in high temperature and high concentration alkali solution. Results The corrosion resistance of 18-8Ti would increase if NaClO3 was added to 50%NaOH at 150 ℃. But the corrosion resistance was nickel decreased. The corrosion resistance of 26-1 and 30-2 would increase only if NaClO3 in alkali solution is proper (0.15%NaClO3 for example); otherwise, the corrosion resistance of 26-1 and 30-2 would decrease. Conclusion Adding Cl– increases corrosion resistance of nickel and 18-8Ti, and thus increases the corrosion resistance of 30-2. Compared with 18-8Ti, the corrosion resistance of 26-1 and 30-2 increases more apparently. |
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