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Study on the Corrosion Behaviours of X80 Pipeline Steel Joints Fabricated via Hot-Wire Tungsten Inert Gas Welding

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Figure

Figure 1. Welding groove type
Table 2. Hot-wire TIG welding parameters
Figure 2.  Microstructures of the hot-wire TIG-welded joints composed of X80 pipeline steel: (a) BM; (b) MZ; and (c) HAZ
Figure 3. Corrosion morphologies of the different zones on the X80 welded joint after immersion in the 3.5% NaCl solution: (a) BM; (b) WZ; and (c) HAZ
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