A STUDY ON PASSIVATING CONDITION IN BOILER CHEMICAL CLEANING PROCESS BY POTENTIAL SCANING ANODIC POLARIZATION

doi:10.19666/j.rlfd.1996.06.009

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A STUDY ON PASSIVATING CONDITION IN BOILER CHEMICAL CLEANING PROCESS BY POTENTIAL SCANING ANODIC POLARIZATION

更新时间：2025-09-28

- A STUDY ON PASSIVATING CONDITION IN BOILER CHEMICAL CLEANING PROCESS BY POTENTIAL SCANING ANODIC POLARIZATION
- Thermal Power Generation Issue 6, (1996)
- 作者机构：
  
  1:长沙电力学院，武汉水利电力大学
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.1996.06.009
  CLC： TK221
- Published：1996
- 稿件说明：
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A STUDY ON PASSIVATING CONDITION IN BOILER CHEMICAL CLEANING PROCESS BY POTENTIAL SCANING ANODIC POLARIZATION[J]. Thermal power generation, 1996, (6).
DOI：

A STUDY ON PASSIVATING CONDITION IN BOILER CHEMICAL CLEANING PROCESS BY POTENTIAL SCANING ANODIC POLARIZATION[J]. Thermal power generation, 1996, (6). DOI： 10.19666/j.rlfd.1996.06.009.

摘要

于国内首次应用动电位扫描法研究了锅炉酸洗钝化的主要控制参数。首先实验确定了合适的电势扫描速度，然后将试片放入待试溶液中，测定各种ｐＨ及Ｃｌ－条件下碳钢的致钝电势、钝化区宽度、过钝化电势及点蚀倾向等。结果显示：若要在碳钢表面获得致密的保护膜，钝化过程的主要控制参数为：ｐＨ＞９．０（若存在［Ｃｌ－］，ｐＨ＞９．５），Ｃｌ－＜１００ｍｇ／Ｌ以及合适的氧化剂浓度。

Abstract

A study on passivating parameter in boilers chemical cleaning process is for the first time in China carried out with potential scanning anodic polarization technique. At first

a suitable scanrate was selected through experiment

then the active-passive transition potential

passive region

passive- transpassivation transition potential and pitting trend of carbonsteels were determined in 0. 3% HL solutions with various PH and CI- concentration. The results show that the main parameters should be controlled as following

pH >9. 0（>9. 5 if presence of Cl-）

[Cl-]<100mg/L

and adequate oxidizerconcentration in order to form tight

adherent and Protective film at the surface of carbon steels during passivating.

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