Typical Corrosion and Protection of Petrochemical Hydrogenation Unit

CHEN Wenwu

doi:10.16577/j.issn.1001-1560.2024.0092

Materials Protection >

2024 , Vol. 57 >Issue 4: 179 - 186

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0092

Typical Corrosion and Protection of Petrochemical Hydrogenation Unit

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(State Key Laboratory of Chemical Safety, Sinopec Research Institute of Safety Engineering Co., Ltd., Qingdao 266100, China)

CHEN Wenwu(1975-)，Master, Senior Engineer, Research Focus: Safety Research on Petrochemical Equipment，Tel.：0532-83786410，E-mail：chenww.qday@sinopec.com

Received date: 2023-12-11

Revised date: 2024-01-01

Accepted date: 2024-01-21

Online published: 2024-04-30

Supported by

Sinopec Research Projects（CLY23049）

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Abstract

Through the analysis of typical corrosion cases and the distribution of corrosion media, the corrosion patterns of petrochemical hydrogenation units were summarized. The main types of corrosion were identified as: crystallization of NH₄Cl and under-deposit corrosion in the reaction effluent system, erosion corrosion by NH₄HS, dew point corrosion by HCl and wet H₂S corrosion in the circulating hydrogen desulfurization tower and stripping tower. The key influencing factors of various typical corrosion mechanisms in hydrogenation units were identified, and targeted corrosion protection measures were proposed, encompassing the selection of equipment and pipeline materials, optimization of operation and enhancement of corrosion monitoring and detection. This paper offered significant guidance for reducing the risk of equipment and pipeline corrosion and ensuring the long-term safe operation of hydrogenation units.

Key words： hydrogenation device; under-deposit corrosion; NH₄Cl crystallization; NH₄HS erosion corrosion; wet H₂S corrosion; corrosion protection

Cite this article

CHEN Wenwu . Typical Corrosion and Protection of Petrochemical Hydrogenation Unit[J]. Materials Protection, 2024 , 57(4) : 179 -186 . DOI: 10.16577/j.issn.1001-1560.2024.0092

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