Corrosion behavior of austenitic and ferritic steels in alkaline and water-salt solutions

Hanna Kniazieva; Sergey Kniaziev; Roman Tomashevskyi; Nadia Kanunnikova; Bohdan Vorobiov; Oleksii Shestopalov; Antonina Sakun

doi:10.15330/pcss.25.4.694-699

Authors

Hanna Kniazieva National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Sergey Kniaziev National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Roman Tomashevskyi National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Nadia Kanunnikova National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Bohdan Vorobiov National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Oleksii Shestopalov National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Antonina Sakun National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine

DOI:

https://doi.org/10.15330/pcss.25.4.694-699

Keywords:

corrosion tests, metallographic studies, sulfide corrosion, austenite, ferrite

Abstract

The paper presents the results of studies of the corrosion behavior of austenitic and ferritic steels in alkaline, sulfide, and chloride environments. Structural changes on the surface when the steels are kept in solutions at room temperature are shown. The chemical composition of the steels was determined, and the exact phase-structural composition was theoretically predicted and metallographically determined. It was found that austenitic steel is almost not subject to sulfide corrosion at room temperature and chlorine-containing substances. At the same time, ferritic steel, under the same conditions, has significant corrosion damage on the surface, especially in places of mechanical damage.

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