Failure Analysis and protection Suggestions of a Leakage Condenser Tubes in Thermal Power Plants

Author:

Li Xiuneng,Yang Chao,Wang Yunan,Hou Shuang,Wu Yuan Jian

Abstract

Abstract The methods of chemical composition analysis, macroscopic morphology inspection, metallographic inspection, scanning electron microscope and energy spectrum analysis are used to analyze the failed condenser brass tubes. The results show that the alloy composition of the condenser tube meets the requirements of the HSn70-1A brass standard. There are many traces of pitting corrosion on the inner surface. The metallographic observation shows that the pitting corrosion is cracking along thegrain boundary, only about 1-3 grains deep. Energy spectrum analysis shows that the content of O, Ca, and P, and a small amount of Cl and S in the corrosion pits are greatly increased, and the zinc content is significantly decreased. Condenser tube leakage is mainly caused by circulating water pollution, until the corrosion penetrates to form a leak. According to the corrosion characteristics, this article puts forward relevant suggestions for the protection of condenser tubes.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference19 articles.

1. Analyzing of causes on corroding of the brass condenser tubes;Li;Hunan Metallurgy,2003

2. Analyzing of causes on corroding of the brass condenser tubes;Li;Hunan Metallurgy,2003

3. Corrosion characteristics and mechanisms of brass tubes for condensers of power plants;Zhang;Shanghai Nonferrous Metals,2003

4. Analyzing the cause of brass tube corrosion in steam turbine condenser;Li;Energy Saving of Non-Ferrous Metallurgy,2004

5. Effect of dezincification on original corrosion leakage of H68A brass condenser tubes;Deng;Dongfang Electric Review,2007

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3