Fig. 3: Surface structural changes caused by the adsorption of OH and/or Cl.
From: Thermodynamic feasibility of the four-stage chloride-induced depassivation mechanism of iron

a Fe(OH)3, b Fe(OH)2Cl, c Fe(OH)Cl2, d FeCl3. The ___location of the edge Fe atom prior to the adsorption is shown with an orange dashed line. White and royal blue spheres represent H and Cl respectively.