摘要
以电厂凝汽器最常用的304不锈钢为试样,确定恒电位阴极极化法评定阻垢剂性能的主要影响因素。结果表明:主要影响因素依次为极化电位、成垢离子浓度、极化时间、温度。优化后的试验条件为:极化电压-1.040V、CaCl2浓度9.0mmol/L、NaHCO3浓度18.0mmol/L、极化时间4.0h和反应温度45.0℃。试验条件优化后可使阻垢率的测定相对误差降低42%,分辨率明显提高。
Taking the most commonly used 304 stainless steel in condensers of power plants as the test samples, the main affecting factors upon adopting the constant potential cathodic polarization method for evaluating scale - inhibitor＇s performance have been determined. Results show that the sequence of main affecting factors is listed as in the following： the potential of polarization, the concentration of ions for scale formation,the time of polarization,and the temperature for polarization. The test conditions after optimization are： the polarization voltage --1. 040 V, CaClz 9.0 mmol/L NaHCO3 18. 0 mmol/L, the polarization time 4 h,the reaction temperature 45.0℃. After optimization of the test conditions, the relative error in measurement of scale- inhibiting rate reduced 42%, the distinguishability being substantially enhanced.
出处
《热力发电》
CAS
北大核心
2012年第1期12-15,20,共5页
Thermal Power Generation
基金
上海热交换系统节能工程技术研究中心开放基金(09SERC02)
上海高校电力腐蚀控制与应用电化学重点实验室开放基金(09KLSU06)
关键词
恒电位
阴极极化
阻垢剂
不锈钢
极化电位
阻垢率
constant potential
cathodic polarization
scale inhibitor
stainless steel
polarization potential
scale - inhibiting rate
