金属在福州地热水中的腐蚀热力学研究──(I)、铜—地热水系统

作者从热力学角度以电位－ｐＨ图探讨金属在福州地热水中的腐蚀趋势．本文报导铜－地热水系统，采用ＢＡＳＩＣ语言编制程序在ＡＰＰＬＥ－Ⅱ微机上计算高温热力学数据，并以ＤＸＹ－８００绘图仪绘制电位－ｐＨ图．同时，测定了铜在福州Ｇｗ２井地热水中的实际腐蚀电位．结果表明：在此地热水中，当温度低于３１８Ｋ，铜表面生成Ｃｕ２Ｏ膜，高于３１８Ｋ，生成ＣｕＯ膜，二者都位于钝化区．

STUDY ON CORROSION THERMODYNAMICS OF METAL IN FUZHOU GEOTHERMAL WATER-(I) COPPER GEOTHERMAL WATER SYSTEM

Authors attempt to explore the corrosive tendeney of metal in Fuzhou geothermal water shown by potential-pH diagram from view of thermodyna- mics. This article reports the study of copper-geothermal water system. It worked out a programme by using BASIC language to calculate the high temperature thermodynamics data on APPLE II microcomputer, and has drawn the E-pH diagram of this, system with DXY-800 Plotter. Simultaneously, the practical corrosive potential of copper in the geothermal water of Fuzhou Gw2 well has been determined. The result shows that, in this geothermal wa- ter, the surface of copper grows up a Cu2O film when the temperature is be- low 318K, and a CuO film when the temperature is higher than 318K. Both are all situated in the passive region.