The Corrosion of Iron in High-Temperature Water: Part 2—Kirkendall Experiments (Part 2 of 2 Parts)

Kirkendall-type experiments were carried out in order to identify the ion species diffusing through the magnetite film formed on corrosion of iron in high temperature water. Iron disks were painted with a slurry of Ni63O, and the surface activity was measured. After corrosion the activity decreased. This decrease is shown to be most readily explained by a covering of Ni63O by magnetite formed as iron ions diffuse outward from the metal-oxide interface to the oxide-water interface. 4.6.5