Degradation of microstructure and strength properties of heat-resistant steels operating under variable loads

Jakubowska, M.; Wrobel, A.; Manaj, W.; Sypien, A.

doi:10.1016/j.ijpvp.2023.104916

Cited by 4 publications

(1 citation statement)

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“…The operating parameters are presented in Table 1. Low-alloy chrome-molybdenum steels are often used for power boiler components [23]. The structure of the steel as well as the resulting oxide layer was tested, both from the outside and the inside of the pipe (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

The Diagnostics of Power Boilers in Terms of Their Sustainability

Gwoździk,

Depciuch

2023

Sustainability

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Diagnosing steam pipelines is crucial because they are subjected to a water vapor environment and exhaust gases. Layers of oxides/deposits formed on steel utilized at elevated temperatures for long time periods have a significant impact on elements operating in power plants as well as in combined heat and power plants. Currently, these devices are an important topic of sustainable energy development. The aim of this work was to characterize the structure of the steel and of the oxides/deposit layer formed on the steam superheaters of power boilers and its impact on the durability of power equipment. The tests were carried out on 13CrMo4-5 steel utilized at various temperature and time parameters. In order to assess the degradation of the material, the following research methods were used: light microscopy, X-ray structural analysis, and infrared spectroscopy with Fourier transform. The use of the FTIR method in this type of diagnostics has deepened the existing analysis of oxide/sediment layers. The obtained test results showed that the kinetics of the corrosion process on steel being used for long periods at elevated temperatures is complex and depends, among others, on the element’s operating temperature, the operating time, and the flow medium.

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Section: Methodsmentioning

confidence: 99%