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mode; using thin (approx. 1 mm) plane specimens cut out in the transversal

direction to rolling.

3. The elaborated semi-field method for assessing hydrogen embrittlement

of thin-walled pipe steels under conditions close to operational makes it possible

to predict their embrittlement due to long-term operation in a hydrogen-containing

environment. The method is included in the syllabus for teaching students of

higher education in specialty 185 – "Oil and Gas Engineering and Technology" at

the Ivano-Frankivsk National Technical University of Oil and Gas.
4. The developed method for investigating the influence of hydrogen gas

on the intensity of electrochemical processes in steel pipes simulates operational

conditions of condensed humidity interaction with the internal surface of the pipe

under hydrogen transportation conditions, enabling the assessment of their

corrosion resistance and hydrogenation intensity under the combined action of

gaseous and electrochemically generated hydrogen.
5. The developed method for assessing the adhesive strength of reinforced

concrete under the action of corrosion-hydrogen environments simplifies and

accelerates its evaluation for reinforced concrete structures.
6. The elaborated corrosion-mechanical technique for fatigue crack arrest

in structural steels within a wide range of stress intensity factor values has been
implemented by LLC “Porttechexpert” to extend the crack growth stage in steel

and thus the safe operation time of portal crane structural components.
7. Investigation results on the effect of operational degradation of fatigue

crack growth of pipe steels have become a basis for the methodology for

comprehensive diagnostics of the material state and residual lifetime of main gas

pipelines, which was implemented at UMG “Lvivtransgaz” of JSC Ukrtransgaz.

Keywords: steel, corrosion, corrosive environment, hydrogen, hydrogen

charging, hydrogen embrittlement, damage, operational degradation.