Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine

Baotou, China

Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine

Baotou, China
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Zhao L.,Inner Mongolia University of Science and Technology | Yuan X.,Inner Mongolia University of Science and Technology | Li Z.,Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine | He J.,Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine | And 2 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015

Effect of heat treatment processes on intergranular corrosion sensitivity of low Ni-Cr-Mn-N austenitic stainless steel was investigated by means of double-loop electrochemical potentiokinetic reaction (DL-EPR) and electrochemical impedance spectroscopy (EIS) methods. The results show that at range of 550-750 ℃, with the prolongation of heating temperature and holding time, the sensitivity of intergranular corrosion rises. And the specimen treated at 950 ℃ has no intergranular corrosion. ©, 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.


Zhao L.-P.,University of Science and Technology of China | Yuan X.,University of Science and Technology of China | Li Z.,Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine
Chinese Rare Earths | Year: 2015

The effect of RE on intergranular corrosion of low Ni austenitic stainless steel in different heat treatment is researched by Cu-CuSO4-16%H2SO4 hot acid soaking method and electrochemical potentiokinetic reactivation. The result shows that the sample is most seriously corroded without RE. For the two groups of test steel, there is more corrosive sulcus sensitizing heat treatment 2 h at 750℃ than 650℃. From the Cu-CuSO4-16% H2SO4 hot acid soaking method and the EPR activating rate data, the intergranular corrosion resistance ability is the highest with 0.02% of La, and become worse with 0.04% of La. ©, 2015, Editorial Office of Chinese Rare Earths. All right reserved.


Zhao L.,University of Science and Technology of China | Yuan X.,Key Laboratory of Multi Metal Resources Comprehensive Utilization of the Inner Mongolia Autonomous Region Baiyunebo Mine | Li Z.,University of Science and Technology of China | He J.,University of Science and Technology of China | And 2 more authors.
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | Year: 2014

For the low NiCrMnN austenitic stainless steel with different content of Ce, the effect of Ce on intergranular corrosion of low NiCrMnN austenitic stainless steel with two kinds of heat treatment was researched by electrochemical potentiokinetic reactivation and Cu-CuSO4-16%H2SO4 hot acid soaking method. The result showed that after the two kinds of heat treatment the sample was corroded most without Ce. For the two groups of test steel, there was more corrosive sulcus sensitizing heat treatment 2 h at 750℃ than sensitizing heat treatment 2 h at 650℃. From the OM pictures of the two experiments and the EPR activating rate data, the intergranular corrosion resistance ability was the highest with 0.053% of Ce after the two kinds of heat treatment, when to 0.067% of Ce, the ability became worse. ©, 2014, Chinese Rare Earth Society. All right reserved.

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