We analyze basic types of corrosion, corrosion-hydrogen, and corrosion-mechanical fractures of steels in hydrogen sulfide-containing media. We propose a new concept based on the chemical interaction of atomic hydrogen with thermodynamically unstable inclusions and carbides of steel, which results in the formation of microvoids on "metal-inclusion" boundaries. This is the main reason for hydrogen sulfide corrosion cracking and hydrogen-induced cracking of steels.
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