文章信息/Info

Title:

Development of solvent-free epoxy coating for protection of transmission tower foot and Study on its anticorrosion performance

作者:

胡家元1; 李延偉1; 劉　栓12; 陳科鋒2; 孫立三2; 戚浩金3; 方云輝3;  周開河3;  張　鴻4

（1. 國網浙江省電力有限公司電力科學研究院，浙江 杭州 310014）
（2. 中國科學院海洋新材料與應用技術重點實驗室 浙江省海洋材料與防護技術重點實驗室 中國科學院寧波材料技術與工程研究所，浙江 寧波 315201）
（3. 國網浙江省電力有限公司寧波供電公司，浙江 寧波 315201）
（4. 中交第二航務工程勘察設計院有限公司，湖北 武漢 430071）

Author(s):

HU Jiayuan1;  LI Yanwei1;  LIU Shuan1; 2;  CHEN Kefeng2;  SUN Lisan2; QI Haojin3;  FANG Yunhui3;  ZHOU Kaihe3;  ZHANG Hong4

(1.Zhejiang Electric Power Corporation Research Institute, Hangzhou 310014, China)
(2.Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China)

關鍵詞:

輸電鐵塔; 保護帽; 腐蝕; 無溶劑涂料; 硅烷偶聯劑

Keywords:

transmission tower;  protective cap;  corrosion;  solvent�瞗ree coating;  silane coupling agent

DOI:

10.7502/j.issn.1674-3962.201802006

文獻標志碼:

A

摘要:

輸電線路塔腳腐蝕影響線路的安全運行，環境污染和鐵塔保護帽積水易造成鐵塔主材與保護帽連接處發生銹蝕失效，開發了一種輸電鐵塔塔腳防護用無溶劑環氧防腐涂料。該涂料具有粘度低、流平性好和施工方便等優點，采用電化學測試技術和鹽霧實驗研究無溶劑涂料的防腐性能，并考察了硅烷偶聯劑對涂層防腐性能和附著力的影響。結果表明: 制備的無溶劑環氧防腐涂料具有良好的滲透性能和防腐性能，并可對鐵塔保護帽進行帶銹施工，無溶劑涂層/ 混凝土體系在鹽霧試驗箱中試驗2000 h后，涂層完整，沒有起泡或剝落現象，硅烷偶聯劑ＫＨ560不僅將涂層附著力從５.６ 提高到８.９ MPa，還能有效增強涂層的柔韌性和耐水性能。

Abstract:

The corrosion of transmission tower foot affected the safe running of the transmission line. The joint between main materials of the steel tower and the protective cap was easily corroded due to the environmental pollution and sedimentary water deposited from the protection cap. A kind of solvent�瞗ree anti-corrosive epoxy coatings used for transmission tower foot protection was developed. These coatings owned the advantages of low viscosity, good leveling, and convenient construction. The corrosion performance of the solvent�瞗ree coating was investigated by electrochemical test and salt spray test. The effect of silane coupling agent on the corrosion resistance and adhesion of the coating was also studied. Results indicated that the prepared solvent�瞗ree anticorrosive epoxy coating exhibited good permeability and anticorrosion properties, and could be constructed in the presence of rust. When the solvent-free coating/concrete system was tested in a salt spray chamber for 2000 h, the coating was complete without foaming or peeling. The silane coupling agent KH560 not only improved the adhesion of the coating from 5.6 to 8.6 MPa but also effectively enhanced the flexibility and water resistance of the coating.