Near-neutral pH corrosion of mill-scaled X-65 pipeline steel with paint primer

Shidong Wang, Lyndon Lamborn, Karina Chevil, Erwin Gamboa, Weixing Chen

Table 5 Thermodynamic data of used species in E-pH calculations at 298.15 K.

Species ΔG0 (kJ mol-1) Ref. Species ΔG0 (kJ mol-1) Ref. H2 0 [52] CO32- -527.9 [52] H+ 0 [52] Fe2+ -78.9 [48] Fe 0 [52] H2CO3 -623.2 [52] FeCO3 -666.67 [48] HCO3- -586.85 [52] Fe3O4 -1015.4 [48] H2O -237.141 [49] α-FeOOH -485.3 [50] Fe2(OH)2CO3 -1169.3 [48] γ-FeOOH -480.1 [51] Fe6(OH)12CO3 -3650 [48]