Analysis of Construction and Quality Acceptance Key Points for Anti-Corrosion Treatment of Gates in Water Conservancy Projects
水利工程闸门防腐处理施工及质量验收要点分析

摘要

水利工程闸门常年处在干湿交替、电化学腐蚀的恶劣环境之中，防腐处理好坏直接影响到工程结构 的安全以及使用寿命。对闸门防腐处理施工准备、工艺控制、质量验收全过程要点进行梳理。表面预处理清 洁度要达到Sa2½级，粗糙度Ry值控制在60μm～100μm之间，涂层总干膜厚度不小于220μm。经过实践 检验可知，系统的验收点可以使防腐涂层厚度偏差在±9.5μm以内，附着力等级达到0.8级，使用寿命提高 21.3%。加强基层处理、控制施工环境、完善过程检测和成品保护等措施，可以提高闸门防腐工程质量及耐久性。

Abstract

Gates in water conservancy projects are exposed year-round to harsh environments involving alternating dry and wet conditions and electrochemical corrosion, and the quality of anti-corrosion treatment directly affects structural safety and service life. This paper reviews the key points of the whole process of gate anti-corrosion treatment, including construction preparation, process control, and quality acceptance. The cleanliness of surface pretreatment should reach Sa 2½ grade, the roughness Ry value should be controlled between 60 μm and 100 μm, and the total dry film thickness of the coating should not be less than 220 μm. Practical verification shows that systematic acceptance control points can keep the thickness deviation of anti-corrosion coatings within ±9.5 μm, make the adhesion grade reach 0.8, and increase the service life by 21.3%. Measures such as strengthening substrate treatment, controlling the construction environment, improving process inspection, and enhancing finished product protection can improve the quality and durability of gate anti-corrosion projects.