Hydrogen bubbling (HB)

2025-12-24View Original

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During the corrosion process, hydrogen atoms released diffuse into the steel, where they tend to accumulate at non-metallic inclusions, layers, and other discontinuities in the steel to form molecular hydrogen. Since hydrogen molecules are relatively large, it is difficult for them to escape from within the steel structure; this results in high internal pressures that cause the surrounding material to yield. The resulting planar cavity structures beneath the surface layer are known as hydrogen bubbles, and their distribution is parallel to the surface of the steel plate. Its occurrence does not require external stress and is closely related to defects such as inclusions in the material.

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Hydrogen bubbling (HB)

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