Study on intergranular corrosion of 316L stainless steel diffusion bonded joint
(0) Intergranular corrosion of 316L stainless steel diffusion bonded joint was studied based on inspection of microstructures and electrochemical potentiokinetic reactivation test. To investigate the effect of grain size on chromium carbide precipitation and sensitization of 316L stainless steel, various grain size samples were produced by heat treating the base material at 1100鈩?for different durations and then sensitized at 650°C with various exposure times. The result showed that the degree of sensitization decreases with increasing grain size. The grain size affects the time to start the sensitization and to reach the complete sensitization. Increasing the grain size can dramatically delay the onset of sensitization. Compared to the base material, the diffusion bonded joint has much better resistance to intergranular corrosion due to the larger grains and the higher percentage of low energy coincident site lattice. The result of the study suggests that increasing the grain size at an optimum level without losing the good mechanical properties could be an effective way to improve the intergranular corrosion resistance of 316L stainless steel.
Degree of sensitization Intergranular corrosion Grain size Diffusion bonded joint
Shuxin Li Shurong Yu Yanni He Pengyi Zhang
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
国际会议
2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012
济南
英文
353-357
2012-10-31（万方平台首次上网日期，不代表论文的发表时间）