Molecular formula :
nature : steel hydrogen-induced cracking of the type. Hydrogen atoms enter gathered after steel rolling along in the direction distribution of non-metallic inclusions interface, and changes to the hydrogen molecule. Hydrogen pressure to a certain extent on the direction of rolling along the lead within the crack. When inclusions short distance between each other, because of the crack tip stress field interaction often produce a series of stepped-like distribution within the crack. Mainly in carbon steel and low alloy steel system of chemicals, oil or gas facilities and pipelines. The medium H2S is a broken incentives, steel rolling along the direction of the distribution of manganese sulfide inclusions on the role of promoting the breakdown.
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