RESEARCH OF APPLICATION OF CR-BASED PVD COATING FOR PROTECTION AGAINST HYDROGEN EMBRITTLEMENT OF STEELS

Metallurgy and Materials
Authors:
Sokolov Ivan S. Dasaev Marat R. Ryzhenkov Artem V. Grigoryev Sergey V. Romanov Ivan A. Ataullin Marat R.
Abstract:

Currently, there is an active development and improvement of technologies for the use of hydrogen as an energy resource. However, active implementation of such technologies faces both technological and economic difficulties. Embrittlement and subsequent destruction of structural materials, which occurs in interaction with hydrogen-containing media, leads to the need for expensive materials and increased reliability requirements, the consequence of which is a decrease in the economic efficiency of projects. In this paper, the effectiveness of chromium (Cr) based PVD coating for protection against hydrogen embrittlement of St20 carbon steel was investigated. The samples underwent experimental tensile testing. The results revealed a 3-fold decrease in embrittlement of experimental samples with 2 µm thick PVD-coating compared to witness samples. In addition, images of the structure of the experimental samples were obtained using an electron scanning microscope.