Discussion on Key Points for Anti-Corrosion Construction, Installation, and Acceptance of Gates in Water Conservancy Projects
基于水利工程的闸门防腐施工安装验收要点探讨

摘要

水工金属结构闸门在经过干湿交替、水流冲刷以及复杂的水化学环境的多重侵蚀后，其防蚀性能会对整个工程的安全性和寿命产生影响，在闸门防腐施工安装验收过程中涉及很多关键技术点，主要从表面预处理、防腐涂层施工、防腐保护及防腐质量检验等方面进行阐述。基于《水工金属结构防腐蚀规范》（SL 105）、《水利水电工程钢闸门制造、安装及验收规范》（GB/T 14173）相关要求，对除锈等级控制、表面粗化程度控制、漆膜厚度与平整度控制、薄弱环节加强处理、现场焊接补漆、损坏修补及验收检查等关键技术要点进行了详细的研究。研究发现，严格的表面清理是防腐的基本条件，合理的涂层结构设计及涂装过程控制是基本保证，安装过程中成品保护以及现场修补是重要辅助，全面系统的检查验收是工程质量判断的标准。本论文可以作为水利工程闸门防腐施工作业和质量管理的技术参考。

Abstract

The corrosion resistance of hydraulic metal gates, after prolonged exposure to alternating wet and dry conditions, water scouring, and complex hydrochemical environments, directly affects the safety and service life of the entire project. The construction, installation, and acceptance of gate anti-corrosion systems involve many critical technical points, mainly including surface pretreatment, anti-corrosion coating application, corrosion protection, and quality inspection. Based on the requirements of the Code for Corrosion Protection of Hydraulic Metal Structures (SL 105) and the Specification for Manufacture, Installation and Acceptance of Steel Gates for Water Conservancy and Hydropower Projects (GB/T 14173), this paper conducts a detailed study of key technical points such as rust removal grade control, surface roughness control, coating thickness and flatness control, reinforcement treatment of weak parts, touch-up painting after on-site welding, damage repair, and acceptance inspection. The study shows that strict surface cleaning is the basic prerequisite for corrosion protection, rational coating system design and coating process control are the fundamental guarantees, product protection during installation and on-site repair are important supplementary measures, and comprehensive, systematic inspection and acceptance constitute the standard for judging project quality. This paper can serve as a technical reference for anti-corrosion construction and quality management of gates in water conservancy projects.