Page 10 - Дисертація ГРЕДІЛЬ_ФМІ

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комплексного діагностування стану матеріалу і залишкового ресурсу

магістральних газопроводів, яку впроваджено в УМГ «Львівтрансгаз» ПАТ

«Укртрансгаз».
Ключові слова: сталь, корозія, корозивне середовище, водень,

наводнювання, водневе окрихчення, пошкодженість, експлуатаційна

деградація.

ABSTRACT
Hredil М. І. Scientific and methodological approaches to assessing the

impact of corrosion and hydrogen factors on operational damage of carbon and

low-alloy steels. – Manuscript.
Thesis for the Doctor’s degree in Engineering Sciences by speciality

05.17.14 – Chemical resistance of materials and corrosion protection. – Karpenko

Physico-Mechanical Institute of the National Academy of Sciences of Ukraine,

Lviv, 2025.
The dissertation addresses a significant scientific and technical problem:

evaluating the mechanisms and regularities of corrosion-hydrogen fracture of
carbon and low-alloy steels caused by operational damage, and developing

methods for its assessment, prediction, and enhancement of fracture resistance.
A methodology for investigating the influence of gaseous hydrogen on the

interaction between pipe steel and corrosive-hydrogenating environments, which
simulates the action of corrosion and hydrogen factors during hydrogen

transportation through pipelines, has been proposed and scientifically

substantiated. It implies determining the corrosion resistance of steel in the model

gas condensate under conditions of its bubbling by hydrogen generated in the

electrochemical cell by water electrolysis. The revealed intensification of

corrosion and hydrogenation of steel under the above conditions indicates a need

for strict control of the transported gas humidity.

The mechanism of damage development in low-strength pipe steels during

their operation under the combined action of hydrogen and operational stresses