氯化物与硫酸盐浓度比对黄铜-铅电偶腐蚀的影响
Effect of Chloride-to-sulfate Mass Ratio on Galvanic Corrosion of Brass-Lead Joints
马湘蒙 1董磊 1黄明风 1靳元容 1吴京阳 1魏群1
作者信息
- 1. 广西大学 资源环境与材料学院,广西 南宁 530004
- 折叠
摘要
以供水管道中黄铜与铅焊接的电偶连接为研究对象,探究不同氯化物与硫酸盐浓度比(CSMR)对黄铜-铅电偶腐蚀的影响.分析了黄铜-铅电偶腐蚀的金属释放量、电化学行为及腐蚀产物.结果表明,CSMR使得多电偶对中阳极极性改变.在CSMR=0～0.5 时,铅锌同作为阳极;CSMR=1 时锌单独作为阳极;而CSMR=∞时,铅单独作为阳极.铅的腐蚀产物为棒状的PbCO3 及片状的Pb3(CO3)2(OH)2,锌的产物为板状的ZnO2,而铜和锡的产物分别为颗粒状Cu2O和块状SnO2.当供水管道中黄铜与含铅材料电偶连接时,为减少铅的释放,建议将CSMR控制在 1 左右.
Abstract
Taking the galvanic coupling connection of brass and lead soldering in water distribution system as the object,the effect of different chloride to sulfate mass ratio(CSMR)on the brass-lead galvanic corrosion was investigated.The metal release,electrochemical behavior and corrosion products of the brass-lead galvanic corrosion were analyzed.The results show that CSMR makes the anodic polarity change in the multi-electrode pairs.At CSMR of 0-0.5,lead and zinc are acted as anode simultaneously;at CSMR=1,zinc is acted as anode alone;and at CSMR=∞,lead is acted as anode alone.The corrosion products of lead are PbCO3 in the form of rods and Pb3(CO3)2(OH)2 in the form of flakes.The product of zinc is flat ZnO2,the product of copper is granular Cu2O,and the product of tin is lumpy SnO2.When brass is galvanic connected to lead-containing material in the water supply pipeline,it is recommended to control the CSMR around 1 to reduce the release of lead.
关键词
氯化物与硫酸盐浓度比(CSMR)/黄铜/铅/电偶腐蚀Key words
chloride to sulfate mass ratio(CSMR)/brass/lead/galvanic corrosion引用本文复制引用
基金项目
广西科技基地和人才专项(桂科AD21220064)
自治区级大学生创新创业训练计划(02110593341)
出版年
2024
NETL
NSTL
万方数据