用NaOH调节高纯水的pH值

Regulation and Control of pH Value for High Purity Water

摘要: 发电机内冷水处于高电场环境，对其水质要求严格，尤其是要防止空芯铜导线的腐蚀。控制发电机内冷水的pH值在8.5~9.0之间可以起到防止空芯铜导线腐蚀的作用，因此本文主要探讨用NaOH调节用作内冷水的除盐水的pH值。通过理论计算和实际调节，发现CO2不仅降低除盐水的pH值、促进铜的腐蚀，而且对除盐水pH值的调节产生很大影响，使NaOH的实际调节用量大于其理论计算用量，而且所调节的pH值越低，实际调节的NaOH用量与理论计算所需NaOH量的偏差越大。

Abstract: The generator inner cooling water in a closed working environment of high electric field, is required strictly for its water quality, particularly for preventing the hollow copper wire from corrosion. Because the control of pH value can play a role to prevent the hollow copper wire from corrosion, the regulation and control of pH value of the deionized water used as the generator inner cooling water are mainly discussed in the paper. The results of the theoretical calculations and actual adjustment experiments show that the pH value of the demineralized water is reduced and the copper corrosion is promoted by CO2, and the pH value adjusted of the demineralized water is also effected greatly by CO2. So that the actual amount is greater than the theoretical value, and the pH value adjusted is lower. The difference between the actual amount and the theoretical value is greater.