| Failure analysis of mechanical seal of nitrobenzene sulfuric acid pump | |
| Pan, Haodan1; Li, Donghao1; Hu, Hongxiang2 | |
| Corresponding Author | Pan, Haodan(panhaodan@126.com) ; Hu, Hongxiang(hxhu@imr.ac.cn) |
| 2022-11-01 | |
| Source Publication | ENGINEERING FAILURE ANALYSIS
 |
| ISSN | 1350-6307 |
| Volume | 141Pages:14 |
| Abstract | Sulfuric acid pumps serving in the nitrobenzene process failed many times due to the mechanical seal's failure in a chemical plant. To clarify the failure reasons, damage characteristics were examined by visual inspection, scanning electron microscopy, and energy dispersive spectros-copy. Moreover, the possibility of the galvanic corrosion was confirmed by the designed tests, and the effects of the pure sulfuric and mixed acid on the corrosion were also clarified by the im-mersion tests. The results show that the material degrades in the form of intergranular corrosion. The most severe damage locates in the sealing gland, in contact with the static ring seat. Galvanic corrosion is mainly responsible for the failure. The differences in the chemical compositions and the microstructure play an important role in galvanic corrosion. Moreover, some suggestions are provided to alleviate the corrosion based on the analysis above. |
| Keyword | Failure analysis Mechanical seal Galvanic corrosion Acid corrosion Sulfuric acid |
| DOI | 10.1016/j.engfailanal.2022.106660 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Mechanical ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000848253900002 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175074 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Pan, Haodan; Hu, Hongxiang |
| Affiliation | 1.Liaoning Petrochem Univ, Coll Petr Engn, Fushun 113301, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Pan, Haodan,Li, Donghao,Hu, Hongxiang. Failure analysis of mechanical seal of nitrobenzene sulfuric acid pump[J]. ENGINEERING FAILURE ANALYSIS,2022,141:14. |
| APA | Pan, Haodan,Li, Donghao,&Hu, Hongxiang.(2022).Failure analysis of mechanical seal of nitrobenzene sulfuric acid pump.ENGINEERING FAILURE ANALYSIS,141,14. |
| MLA | Pan, Haodan,et al."Failure analysis of mechanical seal of nitrobenzene sulfuric acid pump".ENGINEERING FAILURE ANALYSIS 141(2022):14. |
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