Effect of Solution Annealing Temperature on Pitting Behavior of Duplex Stainless Steel 2204 in Chloride Solutions
Liang HE1,2,Yan- jun GUO1,Xia- yu WU1,Yi- ming JIANG1,Jin LI1
1. Department of Materials Science, Fudan University, Shanghai 200433, China 2. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Effect of Solution Annealing Temperature on Pitting Behavior of Duplex Stainless Steel 2204 in Chloride Solutions
Liang HE1,2,Yan- jun GUO1,Xia- yu WU1,Yi- ming JIANG1,Jin LI1
1. Department of Materials Science, Fudan University, Shanghai 200433, China 2. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
ժҪ The effect of solution annealing temperature ranging from 950 to 1200 �� on the microstructure and corrosion performance of duplex stainless steel (DSS) 2204 were investigated. The proportion of the ferrite phase increased while the austenite phase decreased and the ferrite stabilizing elements diluted in the ferrite phase with the increase of annealing temperature. The critical pitting temperature (CPT) of specimens annealed at 1000 �� was higher than those annealed at 950 ��, whereas further increasing the annealing temperature to 1200 �� decreased the CPT. The pitting initiation sites were observed in the austenite phase, at the boundary of ferrite/austenite phase and inside the ferrite phase for specimens annealed at 950, 1000 �� and exceeding 1100 ��, respectively. The evolution trend of the CPT and the pit initiation site were analyzed by the pitting resistance equivalent number.
Abstract��The effect of solution annealing temperature ranging from 950 to 1200 �� on the microstructure and corrosion performance of duplex stainless steel (DSS) 2204 were investigated. The proportion of the ferrite phase increased while the austenite phase decreased and the ferrite stabilizing elements diluted in the ferrite phase with the increase of annealing temperature. The critical pitting temperature (CPT) of specimens annealed at 1000 �� was higher than those annealed at 950 ��, whereas further increasing the annealing temperature to 1200 �� decreased the CPT. The pitting initiation sites were observed in the austenite phase, at the boundary of ferrite/austenite phase and inside the ferrite phase for specimens annealed at 950, 1000 �� and exceeding 1100 ��, respectively. The evolution trend of the CPT and the pit initiation site were analyzed by the pitting resistance equivalent number.
��������:National Natural Science Foundation of China;National Natural Science Foundation of China;National Key Technology R&D Program;Doctoral Fund of the Ministry of Education
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E-mail: corrosion@fudan.edu.cn
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Liang HE,,Yan- jun GUO,Xia- yu WU,Yi- ming JIANG,Jin LI. Effect of Solution Annealing Temperature on Pitting Behavior of Duplex Stainless Steel 2204 in Chloride Solutions[J]. �й������ڿ���, 2016, 23(4): 357-363.
Liang HE,,Yan- jun GUO,Xia- yu WU,Yi- ming JIANG,Jin LI. Effect of Solution Annealing Temperature on Pitting Behavior of Duplex Stainless Steel 2204 in Chloride Solutions. Chinese Journal of Iron and Steel, 2016, 23(4): 357-363.
2016, Vol. 23 
