铜水体系电位-pH图与发电机内冷水pH调节防腐  

POTENTIAL-pH CHART FOR COPPER-WATER SYSTEM AND CONTROLLING pH OF INTERNAL COOLING WATER TO PREVENT GENERATOR FROM CORROSION

作　　者：谢学军[1] 吕珂[1] 晏敏[1] 潘玲[1] 

机构地区：[1]武汉大学动力与机械学院,武汉430072

出　　处：《腐蚀科学与防护技术》2007年第3期162-163,共2页Corrosion Science and Protection Technology

摘　　要：研究了铜水体系电位-pH之间的关系.结果表明,以10-6.2mol/L作为划分腐蚀发生与否的界限较合适,并据此作出了铜水体系的新的简化电位-pH图.The potential-pH chart usually uses 10^-6 mol/L （64μg/L） as the content of copper ions to judge whether the corrosion takes place or not. Accordingly, in order to prevent the hollow copper conductor of the generator from corrosion, it acquires that the pH of internal cooling water should be higher than 6.94. However, the present criterion for the quality of generator internal cooling water acquires that the copper content should be lower than 40μg/L（ the former acquires lower than 200μg/L）, therefore it may not be reasonable that the potential - pH of 10^-6 mol/L is still considered as the content to judge whether the corrosion takes place or not. This article believes that using 10^-6.2 mol/L（40μg/L） as the content to judge whether the corrosion takes place or not is much reasonable through analyzing the relation between potential and pH in the copper-water system,thereby a new potential-pH chart is proposed.

关 键 词：发电机内冷水 电位-PH图 水质标准 

分 类 号：TG172.5[金属学及工艺—金属表面处理]