Investigation on corrosion under insulation (CUI) of 304 stainless steel welded joints

摘要：

Corrosion under insulation (CUI) is a hidden behavior occurring at metal exterior surface under insulation. In this study, a laboratory simulated device of CUI was established to observe the corrosion behavior of 304 stainless steel welded joints under insulation. Welded and sensitized specimens were tested in different corrosive solution for 168h at 120鈩? CUI performance of 304 stainless steel welded joints was then analyzed both by macro- and micro- scales. The results showed that serious corrosion appeared in weld region rather than base metal. In lower concentration NaCl solution, the specimen was more susceptive to CUI than in higher concentration. Compared to welded specimens, the CUI of sensitized specimens was relatively moderate which was correlated to disappearance of poor chromium area in grain boundary through heat treatment.

关键词： Corrosion under insulation (CUI) 304 stainless steel Laboratory simulation Welded joints

作者: Xiaomin Bai Jianqun Tang Jianming Gong Yingjie Jiang

作者单位: School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 211816, China

会议类型: 国际会议

会议名称: 2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012

会议地点: 济南

会议语种:英文

页码: 389-394

在线出版日期: 2012-10-31（万方平台首次上网日期，不代表论文的发表时间）