Corrosion and Tribocorrosion of 07Kh16N6 Steel in Hydrogen-Sulfide Media.

Autor: Khoma, М. S., Vynar, V. А., Ratska, N. B., Patsai, І. О., Pokhmurskii, V. І., Yurkevych, R. М.
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Zdroj: Materials Science; Nov2022, Vol. 58 Issue 3, p281-289, 9p
Abstrakt: We study the influence of hydrogen-sulfide concentration (0–1500 mg/dm3) in chloride-acetate solutions on the corrosion processes, hydrogenation, and corrosion-mechanical wear of 07Kh16N6 steel. It is shown that, independently of its content, the corrosion resistance of steel in these solutions is much lower than in the medium without hydrogen sulfide in which it is passivated. On the steel surface, we observe the appearance of corrosion products in the form of oxide-sulfide compounds whose thickness increases with the hydrogen-sulfide concentration. Their upper layer loses its continuity at a concentration of 1500 mg/dm3. The tribocorrosion characteristics of steel for hydrogen-sulfide concentrations of 100 and 500 mg/dm3 do not undergo substantial changes. At the same time, for 1000 and 1500 mg/dm3 , they decrease by ∼ 30%. The corrosion processes determine the corrosion-mechanical wear of steel in media with different contents of hydrogen sulfide, which is connected with hydrogenation of the surface layers and intense restoration of homogeneous oxide-sulfide films on the surface of friction paths in the case of friction contact. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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