Research Article
Effect of Microstructure on Hydrogen Diffusion in Weld and API X52 Pipeline Steel Base Metals under Cathodic Protection
Figure 7
SEM secondary electron image of (a) base metal at zone 1; (b) weld metal at zone 2, showing the constituent M/A and the inclusions; (c) HAZ at zone 3, showing the constituent M/A and regions formed by bainite.
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