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中国腐蚀与防护学报  2013, Vol. 33 Issue (1): 70-74    
  技术报告 本期目录 | 过刊浏览 |
晶粒尺寸对奥氏体不锈钢晶间腐蚀敏感性的影响
俞树荣1 ,何燕妮1 ,李淑欣1 ,王 璐2
1. 兰州理工大学石油化工学院 兰州 730050;
2. 中国石油兰州石化公司研究院 兰州 730060
Effect of Grain Size on Susceptibility to Intergranular Corrosion for Austenitic Stainless Steel
YU Shurong 1, HE Yanni1, LI Shuxin 1, WANG Lu2
1. School of Petrochemical Engineering,Lanzhou University of Technology, Lanzhou 730050, China;
2. Research Institute of Lanzhou Petrochemical Company, Lanzhou 730060, China
全文: PDF(6132 KB)  
摘要: 

采用微观形貌观察、电化学方法以及晶界分布特征分析研究316L不锈钢扩散连接接头的晶间腐蚀敏感性,探讨晶粒尺寸和微观结构对不锈钢扩散连接接头敏化的影响。结果表明,扩散连接接头在650 ℃下敏化100 h后晶界处几乎没有发现络合物的析出,而母材经过8 h敏化则析出大量络合物。随着晶粒的增大,316LSS晶间腐蚀敏感性降低。晶粒粗化和低能晶界比例的提高导致扩散连接接头的抗晶间腐蚀能力提高,但晶粒粗化是主要因素。

关键词 扩散连接接头晶间腐蚀敏感性晶粒尺寸再活化率    
Abstract

Intergranular corrosion susceptibility of diffusion bonded joints of 316L stainless steel was investigated by using microstructure inspection, electrochemical testing and analysis of grain boundary characteristic. Effect of grain size and microstructure texture on sensitization of the diffusion bonded joint was discussed. The result showed that no chromium carbide precipitation was observed in the diffusion bonded joint after 100 h treatment at 650 ℃, while chromium carbide precipitations could be seen clearly after 8 h treatment in the base material. The susceptibility of the diffusion bonded joint is much less than that of the base material. The intergranular corrosion susceptibility of 316LSS decreases with increasing grain size. Grain coarsening and increase in the amount of the twin boundaries lead to the improvement of the intergranular corrosion resistance, but the grain coarsening is the main contribution.

Key wordsdiffusion bonded joint    susceptibility of intergranular corrosion    grain size    reactivation ratio
    
ZTFLH:  TG174.3+6  

引用本文:

俞树荣,何燕妮,李淑欣,王璐. 晶粒尺寸对奥氏体不锈钢晶间腐蚀敏感性的影响[J]. 中国腐蚀与防护学报, 2013, 33(1): 70-74.
YU Shurong, HE Yanni, LI Shuxin, WANG Lu. Effect of Grain Size on Susceptibility to Intergranular Corrosion for Austenitic Stainless Steel. Journal of Chinese Society for Corrosion and protection, 2013, 33(1): 70-74.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2013/V33/I1/70

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