期刊论文

Electrochemical study of three adaptive materials for air-cooled condensers duct

中文

长沙理工大学学报(自然科学版)

1672-9331

2017

14

1

84-91

10.3969/j.issn.1672-9331.2017.01.013

2013GK2016:湖南省科技计划重点项目 CX2016B415:湖南省研究生科研创新项目

本校为第一机构

火电厂直接空冷凝汽器因特殊介质环境和20#碳钢（20#）的易腐蚀性导致管材腐蚀特别严重。针对这一问题,自建了一套空冷凝汽器模拟装置,选取3004铝合金（3004）和304不锈钢（304）为20#的替换材质,对3种材质进行了腐蚀特性研究,包括模拟挂片腐蚀速率、电化学极化曲线和电化学交流阻抗（EIS）测试等,分析了介质温度、溶解氧和pH值对3种材质腐蚀特性的影响,比较了3种材质的腐蚀性能。研究结果表明,3004和304的腐蚀速率比20#小12个数量级,3004具有非常好的阻抗特性,304次之,20#阻抗特性较差;304出现了Warburg阻抗,电极反应属于混合控制;温度和溶解氧对3004和304腐蚀性能的影响要比20#小。从技术经济...

The corrosion within direct air cooled condenser duct in power plant is particularly serious, due to the bad gas-liquid environment and the ease of corrosion of 20# carbon steel （20# ）. In this paper, 3004 aluminum alloy（3004） and 304 stainless steel（304） is adaptive to instead of 203 . Study on corrosion of three materials was carried in a self-made device simulating actual operation environment of ACC, including hanging piece simulating corrosion, polarization curve and Electrochemical impedance spectroscopy（EIS）. It was to analyze th...