Research on the Corrosion Resistance of Cast Austenitic Stainless Steel Reinforced by Modified SiC Nanopowders
Yang Jun1, Gao Hong2, Chen Meiling3, Liu Yuandong4, Xu Yu5
1 School of Material Science and Engineering, Dalian Jiaotong University, taoci@djtu.edu.cn
2 School of Material Science and Engineering, Dalian Jiaotong University
3 School of Material Science and Engineering, Dalian Jiaotong University
4 School of Material Science and Engineering, Dalian Jiaotong University
5 School of Foreign Languages, Qinghai Normal University
Ключевые слова: modified SiC nanopowders, austenitic stainless steel, corrosion resistance, pitting corrosion resistance, intergranular corrosion resistance
Страницы: 577-582
Аннотация
The austenitic stainless steel materials modified with nano-SiC powder were prepared under the production conditions by foundry method. The corrosion resistance for different amount of SiC added to stainless steel was investigated. The results showed that with the addition of nano-SiC powder, the resistance to chemical corrosion and electrochemical corrosion was markedly improved. The addition of nano-SiC powders can significantly enhance the intergranular corrosion of stainless steel, and the anti-intergranular corrosion of the stainless steel was the result shown both by the metallographic and the bending methods. With the addition of nano-SiC powder, the ferritic and chromium of the stainless steel reduce segregation, so nano-SiC powders can help effectively avoiding the two-phase chromium depleted zones and areas prone to localized corrosion, such as the emergence of the region.
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