【摘要】 <正> 一、引言 M-H₂O体系的E-pH平衡图（又称Po-urbaix图）是由各种物质的优势面积组合成的。它形象直观,概括全面,为物理化学家们分析问题提供了不少信息;在湿法冶金、地球化学、金属的腐蚀与防护等领域日益获更多还原

【Abstract】 For the purpose of comparing the stability of all species, Mi in M-H₂O systems, we have proposed a new concept——thermodynamically ralative stability exponent D, with reference to the most stable elementary substance of the element M, M₁. The exponent for all species Mi was a function of the properties inherent in them and the circumstantial factors, i. e. Applying the set principle to equilibria of the multispecies system, the following equations were obtained. 1. Under given conditions （E, pH, T）, the quantity ratio of all species was 2. Over a wide range of E-pH-T the distribution equation of all species in M- H₂O systems was Based on the above equations a general source programme for M-H₂O systems has been compiled with ALGOL and used to compute E-pH diagrams and other ther- modynamic data.更多还原