| Popis: |
In the preceding chapters, we have focused on the complex-forming properties of components of the medium. The consideration of these and other properties—principally hydrophobicity—allows a better understanding of the aggressive or inhibitive effectiveness of chemical compounds or ions to be reached. This is not surprising since complex formation plays a large role even in the elementary act of metal dissolution. Thus, metal cations passing into an electrolyte are always associated with solvent molecules, counter ions, or other components having free electron pairs. The aquoand hydroxyl-containing complexes of technologically important metals are thermodynamically quite stable and are largely responsible for the importance of water in the corrosion and passivation of metals. Various compounds present in water will be adsorbed by a metal, essentially by the substitution of a solvent molecule by the adsorbate; such processes will include cases involving coordination and chemical bonding with the metal. |
