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中国腐蚀与防护学报  2014, Vol. 34 Issue (1): 59-64    DOI: 10.11902/1005.4537.2013.050
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
16MnR钢在催化裂化再生环境中的应力腐蚀开裂研究
邢云颖 刘智勇 董超芳 李晓刚
北京科技大学腐蚀与防护中心 北京 100083
Stress Corrosion Cracking of 16MnR Steel in FCCU Regeneration Environments
XING Yunying, LIU Zhiyong, DONG Chaofang, LI Xiaogang
Corrosion and Protection Center University of Science and Technology Beijing, Beijing 100083, China
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摘要 通过U形试样应力腐蚀实验、电化学极化曲线等方法,在模拟催化裂化再生器环境条件下,研究了HNO3-H2SO4-H2O体系中16MnR钢及其焊缝的应力腐蚀行为。结果表明:16MnR钢焊接接头在不同实验条件下均比基材更易产生硝酸盐应力腐蚀开裂,其机理主要是阳极溶解;引入硫酸根和降低pH值均能破坏16MnR钢的保护膜,增大其焊接接头的应力腐蚀敏感性;当溶液的pH值降低至2以下时,材料处于活化状态,发生严重的均匀腐蚀。
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邢云颖
刘智勇
董超芳
李晓刚
关键词:  催化裂化  露点  16MnR钢  焊缝  应力腐蚀    
Abstract: The stress corrosion behavior of the weld seam and base metal of 16MnR steel in solution of HNO3-H2SO4-H2O, one of the typical environments of FCCU regenerator, was investigated using U-bend specimen immersion test and electrochemical polarization curves. The results show that the weld seam of 16MnR is more sensitive to nitrate stress corrosion cracking than base metal, its mechanism is anodic dissolution. Both the introduction of sulfate and the slightly reduction of pH can destroy the protective film on 16MnR steel, and increase the corrosion susceptibility of its weld seam. However, when the pH of solution is less than 2, the material is in active state, resulting in a serious of uniform corrosion. Besides the effective methods to slow down the stress corrosion of materials in catalytic cracking regenerator are analyzed in this article.
Key words:  catalytic cracking    dew-point    16MnR    weld seam    stress corrosion
收稿日期:  2013-06-06                出版日期:  2014-02-20      发布日期:  2014-03-06      期的出版日期:  2014-02-20
ZTFLH:  TG172.6  
基金资助: 国家科技支撑计划项目 (2011BAK06B01-01-02) 和中央高校基本科研业务费专项资金项目 (FRF-TP-12-148A) 资助
通讯作者:  刘智勇,E-mail:liuzhiyong7804@126.com   
作者简介:  邢云颖,1988年生,女,硕士生,研究方向为材料的腐蚀与防护
引用本文:    
邢云颖, 刘智勇, 董超芳, 李晓刚. 16MnR钢在催化裂化再生环境中的应力腐蚀开裂研究[J]. 中国腐蚀与防护学报, 2014, 34(1): 59-64.
XING Yunying,LIU Zhiyong,DONG Chaofang,LI Xiaogang. Stress Corrosion Cracking of 16MnR Steel in FCCU Regeneration Environments. Journal of Chinese Society for Corrosion and protection, 2014, 34(1): 59-64.
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http://www.jcscp.org/CN/10.11902/1005.4537.2013.050  或          http://www.jcscp.org/CN/Y2014/V34/I1/59
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Fu C H, Si Y X. Analysis of root causes of equipment cracking in FCCU regenerator system and counter measures [J]. Corros. Prot. Petrochem. Ind., 2010, 27(6): 31-64(付春辉, 司元祥. 催化裂化装置再生系统应力腐蚀开裂原因 [J]. 石油化工腐蚀与防护, 2010, 27(6): 31-64)
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