| 引用本文: | 陈志宇,郭小平,水晓雪,江炯,周开河,刘栓.苛刻海洋大气腐蚀环境下石墨烯改性重防腐涂料在输电铁塔表面的服役性能评价*[J].中国表面工程,2022,34(2):24~34 |
| CHEN Zhiyu,GUO Xiaoping,SHUI Xiaoxue,JIANG Jiong,ZHOU Kaihe,LIU Shuan.Service Performance Evaluation of Graphene Modified Heavy Anticorrosive Coating on the Surface of Transmission Tower under Harsh Marine Atmosphere Corrosive Environment[J].China Surface Engineering,2022,34(2):24~34 |
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| 摘要: |
| 目前国家电网输电铁塔普遍采用镀锌钢进行施工建设，钢材表面镀锌层可以抑制基体腐蚀，保障输电铁塔长期安全服役。但在沿海地区的苛刻海洋工业大气腐蚀环境中，输电铁塔表面镀锌层易发生快速腐蚀失效。研制一种低表面处理石墨烯改性重防腐涂料体系，包括低表面处理石墨烯防腐底漆、环氧石墨烯阻隔中间漆和聚氨酯耐候面漆。通过实验室性能测试、 环境考核试验和示范工程涂装，对其服役性能进行综合评价。结果表明：研制的石墨烯改性重防腐涂料具有良好的隔水性和低表面处理施工性能，复合涂层耐盐雾性能超过 5 000 h，耐循环老化 4 200 h 后漆膜完整。在国网宁波供电公司北坞 2321 线 10 级输电铁塔示范涂装 54 个月后，石墨烯改性重防腐涂层光泽度降低，漆膜变色 1 级，百格附着力在 0~1 级，拉拔附着力 8.56~11.37 MPa。根据室内模拟加速试验和实际工程服役性能测试结果，研制的石墨烯改性重防腐涂料对输电铁塔在苛刻海洋大气腐蚀环境下的综合防护寿命可达 10 年以上。研究了石墨烯改性重防腐涂料体系的实际服役性能，实现在苛刻海洋大气腐蚀环境中对输电铁塔的长效腐蚀防护，为电网设施的长期腐蚀防护提供可靠途径。 |
| 关键词: 海洋工业大气腐蚀环境 镀锌输电铁塔 防护机理 石墨烯改性重防腐涂料 服役寿命 |
| DOI：10.11933/j.issn.1007-9289.20210530001 |
| 分类号:TG174;TB37 |
| 基金项目:中国科学院海洋新材料与应用技术重点实验室开放课题资助项目(2018K04) |
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| Service Performance Evaluation of Graphene Modified Heavy Anticorrosive Coating on the Surface of Transmission Tower under Harsh Marine Atmosphere Corrosive Environment |
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CHEN Zhiyu1,2, GUO Xiaoping2, SHUI Xiaoxue2, JIANG Jiong3, ZHOU Kaihe3, LIU Shuan2
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1.State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology,Beijing 100029 , China;2.Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of MaterialsTechnology and Engineering, Chinese Academy of Sciences, Ningbo 315201 , China;3.State Grid Zhejiang Electric Power Corporation Ningbo Power Supply Company, Ningbo 315201 , China
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| Abstract: |
| The transmission tower of the State Grid are usually constructed of galvanized steel. The galvanized layer can inhibit the corrosion of the substrate and ensure the long-term safe service of the transmission tower. However, in the harsh marine industrial atmospheric corrosion environment in coastal areas, the galvanized layer on the surface of the transmission tower is prone to rapid corrosion failure. Therefore, a surface-tolerant grapheme modified heavy-duty anticorrosion coating system is developed for corrosion protection, including surface-tolerant graphene anticorrosion primer, epoxy graphene barrier intermediate coating, and polyurethane weather-resistant top coating. The comprehensive performance of coatings is investigated by laboratory performance Coating performance, environmental assessment tests, and application in actual projects. Test results show that the prepared graphene modified heavy-duty anticorrosion coating has a good barrier property to water penetration, surface-resistant construction performance, salt spray resistance for more than 5 000 h, and remains intact after 4 200 h of cyclic aging test. After coated on the 10 levels transmission tower (North 2321 Line, State Grid Ningbo Power Supply Company) for 54 months, the gloss of composite coating has been reduced, the color of the paint film is 1 grade, the adhesion obtained by the hundred-grid method is between 0 grade and 1 grade, and the pull-off adhesion is between 8.56 MPa and 11.37 MPa. The graphene modified heavy-duty anticorrosion coating is expected to have a comprehensive protection life of more than 10 years for transmission towers in harsh marine atmospheric corrosion environments. This paper studies the actual service performance of the graphene modified heavy-duty anticorrosive coating system, which realizes the long-term corrosion protection of the transmission tower in the harsh marine atmospheric corrosion environment, and provides a reliable way for the long-term corrosion protection of power grid facilities. |
| Key words: marine industrial atmosphere corrosion environment galvanized transmission tower protection mechanism grapheme modified heavy-duty anticorrosion coating service life |
