Fig. 1From: Characteristic of the Nanoparticles Formed on the Carbon Steel Surface Contacting with 3d-Metal Water Salt Solutions in the Open-Air SystemXRD patterns of the phases formed on the steel surface. The concentration of 3d-metal cations equals 100 mg/dm3 and pH = 6.5. a CoCl2. b NiCl2. c ZnCl2. d CuCl2. e CoSO4. f NiSO4. g ZnSO4. h CuSO4. Numbers correspond to the following phases: 1—green rust I, 2—Fe3O4, 3—γ-FeOOH, 4—α-FeOOH, 5—green rust IIBack to article page