| MIAO Xiao-ling,LIU Guang-ming,YU Fei,WANG Yuan-kui.Hot Corrosion Behavior of TP310HCbN Stainless Steel for USC Boiler[J],(3):37-39，56 |
| Hot Corrosion Behavior of TP310HCbN Stainless Steel for USC Boiler |
| Received:February 16, 2012 Revised:June 20, 2012 |
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| DOI： |
| KeyWord:USC boiler TP310HCbN stainless steel hot corrosion Na2SO4-K2SO4-KCl melts |
| Author | Institution |
| MIAO Xiao-ling |
Material Research Institute, Dongfang Boiler Group Co., Ltd., Zigong , China |
| LIU Guang-ming |
Material Research Institute, Dongfang Boiler Group Co., Ltd., Zigong , China |
| YU Fei |
Material Research Institute, Dongfang Boiler Group Co., Ltd., Zigong , China |
| WANG Yuan-kui |
Material Research Institute, Dongfang Boiler Group Co., Ltd., Zigong , China |
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| Abstract: |
| The hot corrosion behavior of TP310HCbN austenitic heat resistant stainless steel were studied in 80%Na2SO4 + 10%K2SO4 + 10%KCl molten salts at 600 ℃, 650 ℃ and 700 ℃, respectively. The result showed that when the samples were tested at 600 ℃ and 650 ℃ sulfides was detected at the grain boundaries of substrate, which manifested that intergranular corrosion was occurred. However, when the sample corroded at 700℃ the corrosion products spalled from sample surface on a large scale, which led to serious mass loss during the tests. The surface morphology, microstructures and composition of corroded samples were examined by SEM/EDS and XRD. The corroded products on the samples surface were mainly composed of Fe3O4 and(Fe,Cr)2O3 with small amount of NiCr2O4 and Cr2S3. |
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