Affiliation:
1. Peter the Great St.Petersburg Polytechnic University
Abstract
Heat exchangers are widely used in the industry for processing natural gas. The article discusses the causes of corrosion damage to the internal surface of the stainless steel tubes for the heat exchanger coil. Chemical composition of tubes was obtained for provided damaged batch. Results of metallographic studies, as well as results of scanning electron microscopy of individual parts of pipes are presented. Tests for resistance to intergranular corrosion were carried out. The study revealed that the main reason of corrosion damage on the inner wall of the tubes is the formation of carbides along the boundaries of austenitic grains, and as a result, the chromium-depleted grain was subjected to corrosion.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference10 articles.
1. G. Qiu, et al. Numerical study on the condensation flow and heat transfer characteristics of hydrocarbon mixtures inside the tubes of liquefied natural gas coil-wound heat exchangers, Applied Thermal Engineering, 2018, Т. 140, рр. 775-786.
2. A.G. Bagoutdinova, Ya.D. Zolotonosov. Coil heat exchangers. Modeling, calculation: Monografiya, Kazan: Izd-vo Kazansk. gos. arkhitekt.- stroit. un-ta, 2016, р. 245.
3. A. Davydov, E. Alekseeva, A. Gaev, Specificity to the choice of materials for wellhead equipment, Materials Today: Proceedings, 2020, Т. 30, рр. 549-553.
4. A. Fedorov, A. Zhitenev, D. Strekalovskaya, Effect of heat treatment on the microstructure and corrosion properties of cast duplex stainless steels, E3S Web of Conferences. – EDP Sciences, 2021, Т. 225, р. 01003.
5. O. I. Sleptsov et al., The analysis of the causes of efficiency decrease in the metal of liquefied gas pipeline under the conditions of corrosive environmental exposure, Procedia Structural Integrity, 2019, Т. 20, рр. 143-147.