STUDY ON PURE OCTADECYLAMINE FILM-FOMING CHARACTERS OVER METALLIC MATERIALS COMMONLY USED FOR THERMAL POWER UNITS UNDER HIGH-TEMPERATURE CONDITION

WANG Lu1; XIE Jianli2; HU Jiayuan3 1.East China Electric Power Design Institute

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STUDY ON PURE OCTADECYLAMINE FILM-FOMING CHARACTERS OVER METALLIC MATERIALS COMMONLY USED FOR THERMAL POWER UNITS UNDER HIGH-TEMPERATURE CONDITION

更新时间：2025-09-28

- STUDY ON PURE OCTADECYLAMINE FILM-FOMING CHARACTERS OVER METALLIC MATERIALS COMMONLY USED FOR THERMAL POWER UNITS UNDER HIGH-TEMPERATURE CONDITION
- Thermal Power Generation Vol. 40, Issue 12, Pages: 30-33(2011)
- 作者机构：
  
  1. 华东电力设计院
  2. 苏州热工研究院有限公司
  3. 武汉大学动力与机械学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2011
- 稿件说明：
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WANG Lu1, XIE Jianli2, HU Jiayuan3 1.East China Electric Power Design Institute. STUDY ON PURE OCTADECYLAMINE FILM-FOMING CHARACTERS OVER METALLIC MATERIALS COMMONLY USED FOR THERMAL POWER UNITS UNDER HIGH-TEMPERATURE CONDITION[J]. Thermal power generation, 2011, 40(12): 30-33.
DOI：

WANG Lu1, XIE Jianli2, HU Jiayuan3 1.East China Electric Power Design Institute. STUDY ON PURE OCTADECYLAMINE FILM-FOMING CHARACTERS OVER METALLIC MATERIALS COMMONLY USED FOR THERMAL POWER UNITS UNDER HIGH-TEMPERATURE CONDITION[J]. Thermal power generation, 2011, 40(12): 30-33. DOI：

摘要

采用GCF型高压釜模拟高于350℃下的水汽环境

对20G、T22、SA210A-1等3种火电机组水汽系统常用材质进行了十八胺成膜试验

依据硫酸铜点滴试验、交流阻抗、极化曲线等方法评价成膜效果

并利用Matlab 6.5对结果进行回归分析。结果表明:在温度为470～490℃

十八胺浓度为60～70mg/L

恒温时间为3～5h

pH值为8.8左右时

3种金属材料表面均能形成很好的保护膜

其中pH值对成膜效果影响最大

最佳pH值为9.0。此外

十八胺在不同金属表面成膜效果存在差异。

Abstract

By using GCF type high-pressure cauldron to simulate the water-steam environment higher than 350 ℃

the film-forming test of three kinds of metals commonly used in water-steam systems of thermal power units

namely 20G

T22

and SA210A-1

has been carried out by using pure octadecylamine under water-steam environment of temperature higher than 350 ℃

and the effectiveness of film-forming being evaluated by using methods of copper sulfate spot out test

ac resistance

and the polarization curve.The regression analysis of film-forming results has been carried out using software MATLAB 6.5.Results show that the very good film can form on surface of three said metallic materials under temperature 470~490 ℃

and the concentration of octadecy lamine being 60~70 mg/L

the time of constant temperature being 3~5 h

and the pH value being about 8.8

among these factors

the influence of pH value upon film-forming effectiveness is the largest

the optimal pH value is 9.0.The film-forming effectiveness of octadecylamine on surface of different metallic materials boasts difference.

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