Influence of contact layer on the sulphur corrosion of copper conductors in power transformers
作者机构：State Key Laboratory of Power Transmission Equipment and System Security and New TechnologyChongqing UniversityChongqingChina College of Material Science and EngineeringChongqing UniversityChongqingChina Key Laboratory of Industrial Internet of Things and Networked ControlMinistry of EducationChongqing University of Posts and TelecommunicationsChongqingChina State Grid Jiangsu Electric Power Co.Ltd.Electric Power Research InstituteNanjingChina
出 版 物：《High Voltage》 (高电压（英文）)
年 卷 期：2022年第7卷第1期
页 面：176-184页
核心收录：
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学]
基 金：supported in part by the National Natural Science Foundation of China(Grant No.51677015 and 51907014) the Natural Science Foundation of Chongqing Province of China(Grant No.cstc2019jcyj‐msxmX0070)
摘 要：Owing to the corrosive sulphides in the mineral insulating oil such as dibenzyl disul-phide(DBDS),copper windings in oil‐immersed transformers may suffer sulphur *** study investigates the influence of different contact conditions on the corrosion of copper conductors in ***‐immersed accelerated corrosion experiment was conducted on copper conductors with various contact materials and different layers of insulating *** surface micromorphology,deposition compo-nent and the potentiodynamic polarization characteristics of copper conductors were *** results show that copper with different contact materials suffer sulphur corrosion;conversely,bare copper rarely *** was also verified that the existence of a particular gap between copper and contact layer is a significant factor in sulphur corrosion by the formation of a concentration cell on the copper *** insu-lating paper wrapped around copper conductors does not increase the corrosion ten-dency of copper;however,it contributes to the formation of a region concentrated with DBDS,Cu^(2+),H^(+)by adsorption and impediment,which plays a key role in facilitating the sulphur corrosion of copper ***,sulphur corrosion can also occur on other metal parts in transformers when there is a particular gap on surfaces other than copper.
维普期刊数据库