17. Eh - pH — DIAGRAMS （Pourbaix—diagrams)Eh—pH-diagrams show the thermodynamic stability areas of different species in an aqueous solution。 Stability areas are presented as a function of pH and electrochemical potential scales 。 Usually the upper and lower stability limits of water are also shown in the diagrams with dotted lines. Traditionally these diagrams have been taken from different handbooks12。 However, in most handbooks these diagrams are available only for a limited number of temperatures, concentrations and element combinations.Eh-pH 图显示不同物种在水溶液中的热力学稳定区.稳定的地区作为一个潜在的尺度和电化学作用的 pH 值。通常上、水下稳定极限也与虚线图所示。传统上，这些图已从不同的 handbooks12。然而，在大多数手册这些图是只有数量有限的温度,浓度和元素组合.The Eh—pH module of HSC Chemistry allows the construction of diagrams in a highly flexible and fast way， because the user can draw the diagrams exactly at the selected temperature and concentration.HSC 化学 Eh—pH 模块允许在一个高度灵活和快速的方式图解，因为用户可以画出图形，在选定的温度和浓度。The Eh—pH—module is based on STABCAL — Stability Calculations for Aqueous Systems - developed by H.H. Haung, at Montana Tech 。 , USA9，10.Eh-pH 模块是基于 stabcal 稳定性计算水系统由 H.H.黄发达，蒙大纳科技，usa9,10。17.1IntroductionEh-pH—diagrams are also known as Pourbaix Diagrams according to author of the famous Pourbaix diagram handbook12。 The most simple type of these diagrams is based on a chemical system consisting of one element and water solution， for example, the Mn-H2O—system。 The system can contain several types of species， such as dissolved ions, condensed oxides， hydroxides， oxides, etc。 The Eh—pH-diagram shows the stability areas of these species in the redox potential-...
