腐蚀在线监测技术在中水为补充水的循环冷却水系统中的应用

The application of on-line corrosion monitoring for circulating cooling-water system using reclaimed water as make up water

介绍了应用于中水为补充水的循环水系统的腐蚀在线监测系统原理、组成及其在某电厂的应用情况。采用先进的电化学综合测试仪对在线监测系统进行了校验,结果表明在线监测系统测量结果准确可靠。该系统采用同种材料的三电极体系,利用线性极化技术测量了铜和碳钢材质在循环水系统中的瞬时腐蚀速率和极化电阻。现场应用结果表明,通过腐蚀在线监测可指导循环水的投加缓蚀剂处理,在采用中水为补充水的循环水系统中,碳钢材质的腐蚀在线监测与铜材质的腐蚀在线监测同样重要。

The operating principle, structure and application of an on-line corrosion monitoring system were introduced for the circulating water system using reclaimed water as make up water. The advanced electrochemical measuring equipment was used to check the monitoring system and the accurate and reliable results were obtained. Considering the three-electrode system of same material used in such system, the linear polarization technology was introduced to measure the instantaneous corrosion rate and polarization resistance of copper and carbon steel. The on-site application shows that the on-line corrosion monitoring system is practicable for the inhibitor adding operation and the on-line corrosion monitoring is of the same importance for carbon steel and copper material in the circulating water system using reclaimed water as make up water.