316L不锈钢在常压塔内的应力腐蚀机理及工程防护
PDF下载 (98)李 进,李之尚,金 波,黄栩浩,周灏予,朱 珏.316L不锈钢在常压塔内的应力腐蚀机理及工程防护[J].宁波大学学报(理工版),2025,38(4):56-66.DOI:10.20098/j.cnki.1001-5132.2025.0120
LI Jin,LI Zhishang,JIN Bo,HUANG Xuhao,ZHOU Haoyu,ZHU Jue.Stress corrosion cracking mechanism and engineering protection of 316L stainless steel in atmospheric pressure tower environments[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(4):56-66.DOI:10.20098/j.cnki.1001-5132.2025.0120
| Title: | Stress corrosion cracking mechanism and engineering protection of 316L stainless steel in atmospheric pressure tower environments |
| 作者: | 李 进, 李之尚, 金 波, 黄栩浩, 周灏予, 朱 珏 |
| Author(s): | LI Jin, LI Zhishang, JIN Bo, HUANG Xuhao, ZHOU Haoyu, ZHU Jue |
| 关键词: | 316L不锈钢; 应力腐蚀; 电化学; 涂层防护 |
| Keywords: | 316L stainless steel; stress corrosion; electrochemistry; coatingprotection |
| 分类号: | TE962 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.0120 |
| 文献标识码: | A |
| 摘要: | 针对常压塔塔顶封头焊缝下沿处的开裂问题，探讨了316L不锈钢（塔体主要材质）在H2S-HCl-H2O环境下的腐蚀机理。利用慢应变率拉伸试验和扫描电子显微镜（SEM），分析H2S、Cl−浓度以及pH值对316L不锈钢在H2S-HCl-H2O环境中应力腐蚀敏感性的影响。同时，改进了目前已有的有机硅涂层与聚四氟乙烯涂层，并通过耐高温试验、附着力测试和电化学评估，明确316L不锈钢在塔内工况下的高温稳定性和耐腐蚀性。结果表明，2种改进的涂层均具有优异的耐高温性和耐腐蚀性，可以有效防止常压塔封头裂纹的扩展。 |
| Abstract: | To address the cracking issue at the weld line of the dome in a pressure tower, this study investigates the corrosion mechanism of the tower material, 316L stainless steel, in an H2S-HCl-H2O environment. The primary material of the tower, austenitic stainless steel 316L, was selected as the research subject. Using slow strain rate tensile testing and scanning electron microscopy (SEM), the effects of H2S, chloride concentration, and pH on the stress corrosion sensitivity of 316L stainless steel in the H2S-HCl-H2O environment were analyzed. In addition, the existing silicone coatings and PTFE coatings were improved and subjected to high-temperature tests, adhesion tests and electrochemical evaluations to determine their high-temperature stability and corrosion resistance under the tower conditions. The results demonstrate that the two improved high-temperature coatings exhibit excellent high-temperature and corrosion resistance, effectively preventing the propagation of cracks in the pressure tower dome. |
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| 备注/Memo: | 收稿日期：2025−01−16 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目：国家自然科学基金（11972203，11572162，12102214）；宁波市“科创甬江2035”关键技术突破计划项目（2024Z256）；宁波市“科技创新2025”重大专项（2022Z209）；宁波市自然科学基金（202003N4152，2022J128） 第一作者：李 进，硕士研究生，主要研究方向为设备失效及防护。E-mail: 1170208704@qq.com *通信作者：朱 珏，博士/教授，主要研究方向为设备失效及防护。E-mail: zhujue@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
