Abstract
Healing of hydrogen - attacked (HA) cracks in carbon steel was studied by using hot press treatment. Under hot plastic deforming at 1000°C and the deformation rate of 40%, the most of HA cracks can be recovered completely within 15 min. Partial HA cracks, which has not been recovered by hot - press treatment, present the spherical cap - shaped with the length of about 4 μm ∼ 8 μm. Comparing with the results of high temperature treatment without press (cyclic heat treatment between room temperature and 1000 °C for 10 h), both the healing degree and speed under hot plastic deforming are improved obviously. There are not distinct difference of healing results between the direct hot - press healing and pre - heated treatment before hot - press healing. That means the decomposition of methane in HA cracks is not the key step during the whole healing process.
| Original language | English |
|---|---|
| Pages (from-to) | 104-108 |
| Number of pages | 5 |
| Journal | Journal of the Chinese Society of Corrosion and Protection |
| Volume | 27 |
| Issue number | 2 |
| State | Published - Apr 2007 |
| Externally published | Yes |
Keywords
- Carbon steel
- Crack
- Healing
- Hydrogen attack
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