Research Article
Effect of Microstructure on Hydrogen Diffusion in Weld and API X52 Pipeline Steel Base Metals under Cathodic Protection
Table 2
Terminology and heat treatment conditions of API X52 carbon steel the samples.
| Terminology | Heat treatment conditions |
| Base metal (BM) | As received of the industry | Annealed base metal (ABM) | Heated at 900°C, cold in the oven | Quenching base metal (QBM) | Heated at 900°C, cold in water, ice, and salt | Weld metal (WM) | Removed from the welded joint of the pipeline as received |
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