Near-neutral pH corrosion of mill-scaled X-65 pipeline steel with paint primer
Shidong Wang, Lyndon Lambornb, Karina Chevilc, Erwin Gamboac, Weixing Chena,*(
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Fig. 15.. E-pH diagrams for the Fe-H2O-CO2 system at 25 °C, pressure =1 bar: (a) [Fe2+] = 10-6, 10-5, 10-4 and 10-3 mol/l and the concentrations of the anions are assumed to be 10-2 mol/l, (b) [Fe2+] = 10-6 mol/l, [anions] = 10-3, 10-2 and 10-1 mol/l. The superposed red and blue triangles respectively represent OCP values of mill-scaled and primer pre-coated samples at various immersion time.
