Vliv vodíkové křehkosti na mechanické vlastnosti korozivzdorných ocelí

Abstract

This bachelor thesis focuses on the issue of hydrogen embrittlement of steels, more specifically stainless steels used for hydrogen technology. The review part of the thesis includes a description of the behaviour of hydrogen in steel, discusses the hydrogen embrittlement of steels, characterises stainless steels and the effect of hydrogen embrittlement on their mechanical properties, and finally focuses on surface treatments as barriers to hydrogen permeation into steels. The practical part deals with the description of AISI 630 steel and the different types of surface coatings applied to it. It defines the parameters of electrolytic hydrogenation. As a result of the practical part, the results of the initial state tensile test were compared with the electrolytically hydrogenated samples. This revealed that the steel used is susceptible to hydrogen embrittlement, but also that this behaviour can be partially eliminated just by applying coatings.