发电机空芯铜导线腐蚀速率电化学试验研究

doi:10.11930/j.issn.1004-9649.2014.7.12.3

中国电力 ›› 2014, Vol. 47 ›› Issue (7): 12-15.DOI: 10.11930/j.issn.1004-9649.2014.7.12.3

发电机空芯铜导线腐蚀速率电化学试验研究

李俊菀¹, 曹杰玉¹, 宋敬霞¹, 王红卫², 汪思华¹

1. 西安热工研究院有限公司,陕西西安 710032;
2. 华电章丘发电有限公司,山东章丘 250216

收稿日期:2014-03-11 出版日期:2014-07-18 发布日期:2015-12-10
作者简介:李俊菀（1984—）,男,福建泉州人,工程师,硕士,从事电厂在线化学仪表、化学监测技术研究。E-mail: lijunwan@tpri.com.cn
基金资助:
中国华电集团公司科技项目（CHDKJ12-01-37）

Elechemical Research on the Effects of pH and Dissolved Oxygen on Corrosion Rate of Hollow Strands of Water-Cooled Generators

LI Jun-wan¹, CAO Jie-yu¹, SONG Jing-xia¹, WANG Hong-wei², WANG Si-hua¹

1. Xi’an Thermal Power Research Institute Co. Ltd., Xi’an 710032, China;
2. Zhang qiu Power Generation Co. Ltd., Zhangqiu 250216, China

Received:2014-03-11 Online:2014-07-18 Published:2015-12-10
Supported by:
This work was supported by Science and Technology projects of China HuaDian Corporation （CHDKJ12-01-37）

摘要/Abstract

摘要： 采用电化学测试方法,对发电机内冷水模拟工况和现场运行工况下铜腐蚀速率进行测量,研究内冷水pH值和溶解氧对发电机空芯铜导线腐蚀速率的影响规律。研究结果表明,铜腐蚀速率随内冷水pH值的提高而降低,内冷水最佳pH值为8.5左右;贫氧工况更有利于发电机铜线棒的整体腐蚀防护,当pH值为8.5左右,且铜表面形成具有保护性的氧化膜时,富氧工况也能够满足发电机铜线棒的安全运行。

关键词: 发电机, 空芯铜导线, 腐蚀, 电化学, 内冷水pH值, 溶解氧

Abstract: The corrosion rates of hollow strands under different simulated and onsite operation conditions were obtained by electrochemical test method in order to investigate the effects of pH and dissolved oxygen content on corrosion rate of hollow strands of water-cooled generators. Results showed that copper corrosion rate reduced with the increase of pH and the optimal pH value was around 8.5; Low-oxygen condition was more advantageous than rich-oxygen condition with regard to overall corrosion protection of copper bars. Rich-oxygen condition could also guarantee the safe operation of copper bars when the pH value was around 8.5 and a protective oxidation film had existed on the copper surface.

Key words: generator, hollow strand, corrosion, electrochemistry, pH value of inner-cooling water, dissolved oxygen

中图分类号:

TM311

李俊菀, 曹杰玉, 宋敬霞, 王红卫, 汪思华. 发电机空芯铜导线腐蚀速率电化学试验研究[J]. 中国电力, 2014, 47(7): 12-15.

LI Jun-wan, CAO Jie-yu, SONG Jing-xia, WANG Hong-wei, WANG Si-hua. Elechemical Research on the Effects of pH and Dissolved Oxygen on Corrosion Rate of Hollow Strands of Water-Cooled Generators[J]. Electric Power, 2014, 47(7): 12-15.

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https://www.electricpower.com.cn/CN/Y2014/V47/I7/12

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发电机空芯铜导线腐蚀速率电化学试验研究

Elechemical Research on the Effects of pH and Dissolved Oxygen on Corrosion Rate of Hollow Strands of Water-Cooled Generators

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发电机空芯铜导线腐蚀速率电化学试验研究

Elechemical Research on the Effects of pH and Dissolved Oxygen on Corrosion Rate of Hollow Strands of Water-Cooled Generators

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