Revised Pourbaix diagrams for zinc at 25-300 degrees C

被引：169

作者：

Beverskog, B ^{[1
]}

Puigdomenech, I ^{[1
]}

机构：

[1] STUDSVIK ECO & SAFETY AB, S-61182 NYKOPING, SWEDEN

来源：

CORROSION SCIENCE | 1997年 / 39卷 / 01期

关键词：

zinc; elevated temperatures; Pourbaix diagram;

D O I：

10.1016/S0010-938X(97)89246-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pourbaix diagrams (potential/pH diagrams) for zinc at 25-300 degrees C have been revised. The diagrams were calculated for three concentrations, 10(-5), 10(-6) and 10(-8) molal, the latter for use in high purity water such as in nuclear power reactors. Extrapolation of thermochemical data to elevated temperatures has been performed with the revised model of Helgeson-Kirkham-Flowers, which also allows uncharged aqueous complexes, such as Zn(OH)(2)(aq), to be handled. The calculations show that the hydroxide of zinc does not passivate at the concentration of 10(-6) M, due to the uncharged zinc(II) complex, Zn(OH)2(aq). However, at concentrations greater than or equal to 10(-5.7) M zinc passivates by formation of ZnO, which is stable in the temperature interval investigated. Copyright (C) 1996 Elsevier Science Ltd

引用

页码：107 / 114

页数：8

共 35 条

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