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Ключові слова: армко залізо, сталь У8, сталь 45, сірководень, сульфіди
заліза, перенапруга, корозія, наводнювання, корозійне розтріскування.
ANNOTATION
Holovei S. A. Iron sulphides influence on corrosion and hydrogenation of carbon
steels and their hydrogen sulphide corrosion cracking. – Qualification scientific work
with the manuscript copyright.
The thesis for a candidate of technical sciences degree in specialty 05.17.14
«Chemical resistance of materials and corrosion protection». – Karpenko Physico-
mechanical institute of the NAS of Ukraine, Lviv, 2018.
The thesis of establishment to solve scientific and technical problems of the
relationship between the rate of oxidation-reduction reactions and steels
hydrogenation of different structures in the presence of iron sulfide on the surface in
chloride-acetate hydrogen sulfide media and determination of their resistance to
hydrogen sulfide corrosion cracking and the main factors on it influencing is devoted.
The thesis is dedicated to correlation of the oxidation-reduction reactions rate
and hydrogenation of steels with a different structures in chloride-acetate hydrogen
sulphide media, taking into account the presence of iron sulphide on the surface of
steels. The resistance of steels to hydrogen sulphide corrosion cracking is determined.
A well-known scheme of the mechanism of hydrogen sulphide influence on
increasing of corrosion rate and steels hydrogenation has been supplemented.
The oxidation-reduction reactions of Sulfur have been established by cyclic
voltampermetry method. These reactions can influence on corrosion rate and
hydrogenation of steels in a sodium sulphide solution with the inert glass-graphite
electrode. It is concluded that oxidation is flowing with the release of Sulfur and the
subsequent slowing reaction of polysulphide formation, and the restoration with the
dissociation reaction of polysulphide ions with their previous adsorption.
It has been found that the potentials of anodic oxidation of hydrogen desorbed
from metal and oxidation of Armco iron to Fe(II) on cyclic voltamperograms are
coincided. This is confirmed by studies of Armco iron and platinum hydrogenation.