特高压输电线路铁塔制件热镀锌工艺管理
Management of Hot-dip Galvanizing Process for Iron Tower Components of Ultra-high Voltage Transmission and Transformation Lines
胡立东 1苗立贤 1周登雄 1江亮1
作者信息
- 1. 江苏翔宇电力装备制造有限公司,江苏淮安 223001
- 折叠
摘要
国内电压等级超过1 000 kV以上的输电线路铁塔,被列为国家电力持续提升高输电容量和远距离输送电的重点发展方向.国家电网对铁塔钢制构件热镀锌镀层提出了技术要求,为满足技术要求,文章在热镀锌工艺上针对Q420 C钢材高硅和磷元素对热镀锌质量的影响,采用低温镀锌、在锌液中添加铝、镍稀土合金等措施,在酸洗除锈、溶剂助镀参数、锌液净化等方面均做了一些创新.该工艺能够满足特高压输电线路铁塔及构件的热镀锌质量要求和国家电网DL/T 5300及DL/T 5236评定规程有关要求.
Abstract
Transmission line towers with voltage levels exceeding 1000 kV in China are listed as the key development direction for the country's continuous improvement of high transmission capacity and long-distance power transmission in the future;State Grid Corporation of China has put forward technical requirements for hot-dip galvanizing coatings on steel components of iron towers.In order to meet these requirements,this article focuses on the impact of high silicon and phosphorus elements on the quality of hot-dip galvanizing in Q420 C steel in terms of hot-dip galvanizing process and management.Measures such as low-temperature galvanizing,adding aluminum,nickel rare earth alloys to the zinc solution,etc.are adopted;Innovations have been made in acid pickling,solvent assisted plating parameters,zinc liquid purification,and chromium free passivation;Through production practice,it has been shown that the new process management adopted can meet the quality requirements of hot-dip galvanizing for ultra-high voltage iron towers and components,as well as the relevant requirements of the DL/T5300 and DL/T5236 evaluation regulations of the State Grid.
关键词
特高压铁塔/热镀锌工艺/规范操作/表面质量Key words
ultra-high voltage iron tower/hot dip galvanizing process/standardized operation/surface quality引用本文复制引用
出版年
2024
NETL
NSTL
万方数据