Fig. 1 | npj Materials Degradation

Fig. 1

From: Utilization of chemical stability diagrams for improved understanding of electrochemical systems: evolution of solution chemistry towards equilibrium

Fig. 1

Chemical stability diagram depicting the relative stabilities of Mg2+, Mg(OH)2, and MgO. The thick solid lines describe the equilibrium condition for Mg(OH)2 (blue, line 8.1) and MgO (black, Line 8.2) formation. Thin dashed lines describe the trajectory by which the solution chemistry changes from an initial condition (✦) to an equilibrium condition (●) as Mg, Mg(OH)2, or MgO dissolves into solution (line 9). Each trajectory line corresponds to a different initial solution chemistry for various [Mg2+] at pH 4 (purple), 7 (red), and 10 (green). Included is an inset graph which depicts the pH and [Mg2+] conditions of predominance for Mg2+, Mg(OH)2, and MgO in pH-[Mg2+] space

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