OPTIMIZATION OF TEST CONDITIONS FOR EVALUATING SCALE-INHIBITOR'S PERFORMANCE BY USING CONSTANT POTENTIAL CATHODIC POLARIZATION METHOD

LIN Jianzhen1; LIANG Lei1; LI Mingli2; ZHOU Guoding1 1.Research Center of Energy-saving in Heat Exchange System

English

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OPTIMIZATION OF TEST CONDITIONS FOR EVALUATING SCALE-INHIBITOR'S PERFORMANCE BY USING CONSTANT POTENTIAL CATHODIC POLARIZATION METHOD

Thermal Power Generation Vol. 41, Issue 1, Pages: 12-15(2012)

更新时间：2025-09-28

- OPTIMIZATION OF TEST CONDITIONS FOR EVALUATING SCALE-INHIBITOR'S PERFORMANCE BY USING CONSTANT POTENTIAL CATHODIC POLARIZATION METHOD
- 作者机构：
  
  1. 上海电力学院热交换系统节能工程技术研究中心
  2. 同济大学化学系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2012
- 稿件说明：
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LIN Jianzhen1, LIANG Lei1, LI Mingli2, et al. OPTIMIZATION OF TEST CONDITIONS FOR EVALUATING SCALE-INHIBITOR'S PERFORMANCE BY USING CONSTANT POTENTIAL CATHODIC POLARIZATION METHOD[J]. Thermal Power Generation, 2012, 41(1): 12-15.
DOI：

LIN Jianzhen1, LIANG Lei1, LI Mingli2, et al. OPTIMIZATION OF TEST CONDITIONS FOR EVALUATING SCALE-INHIBITOR'S PERFORMANCE BY USING CONSTANT POTENTIAL CATHODIC POLARIZATION METHOD[J]. Thermal Power Generation, 2012, 41(1): 12-15. DOI：

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。

Abstract

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

CaCl2 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.

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