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表面涂覆防腐涂层是延缓基材腐蚀的有效措施,但由于外部因素和内部因素的综合作用,涂层表面难免会出现磨损、划痕和微裂纹等。涂层的微裂纹容易加速基材腐蚀,进而导致涂层的大面积失效,大大缩短涂层的保护寿命。自修复防腐涂层因能主动修复微裂纹,延长涂层的保护寿命,受到业界广泛关注。本文简要概述了二维石墨烯材料在自修复防腐涂层领域的应用,总结了外援型自修复防腐涂层和本征型自修复防腐涂层在防腐领域的优缺点,并详细介绍了各类自修复涂层的组成和自修复机理。针对当前石墨烯基自修复防腐涂料存在的问题展望了其发展方向。 相似文献
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介绍了西安城市混凝土立交桥涂装配套设计方案,对提高混凝土防腐涂层抗污性的措施和防腐抗污涂层的技术要求进行了论述,并对混凝土桥梁涂装的施工工艺进行了介绍。 相似文献
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《中国石油和化工标准与质量》2019,(7):245-246
新时期以来,油田企业的安全运营压力持续上扬。油田压力容器和储罐作为重要的工艺生产设备,其安全、稳定运营对企业而言尤为重要。随着涂层技术的快速发展,在油田压力容器和储罐的防腐作业中得到了广泛的应用。油田企业应明晰涂层防腐和失效机制,合理地选用涂料类型,并严控内涂层施工工程,以确保容器的安全可靠运行。本文对压力容器和储罐涂层防腐的机理和失效机制进行了阐述,就压力容器和储罐防腐涂层技术的涂料选择展开了分析,并提出了油田压力容器和储罐内涂层施工质量控制的有效策略,将为我国油田企业压力容器和储罐内涂层技术的应用和研发提供基础思考。 相似文献
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船舶和钢结构制造过程中的结构缺陷都会直接影响涂料涂层的质量,甚至导致涂料涂层的防腐性能失效。本文论述了结构缺陷的类别、形态、危害和如何消除结构缺陷的措施。以确保涂料涂层的防腐质量。 相似文献
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埋地管道防腐涂料的发展趋势 总被引:1,自引:0,他引:1
腐蚀是引起埋地管道破坏和失效的主要原因之一,研究管道的腐蚀与防护技术,对延长管道的使用寿命以及保证工业生产的顺利进行具有重要意义。本文介绍了埋地管道的腐蚀机理和防腐措施,重点介绍了埋地管道防腐涂料的种类、优缺点及其发展趋势。 相似文献
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《Ceramics International》2022,48(18):25858-25871
Graphene-modified phosphate-based metal/ceramic composite coatings were prepared for corrosion protection in the high-temperature marine environment. The morphology and structure of the coating were observed by SEM, and the high-temperature anticorrosion performance of the coating was analyzed by electrochemical measurement and salt spray-high temperature cycle test. The results showed that the addition of 0.1 wt% graphene could bridge the aluminum particles inside the composite coating and extend the sacrificial anode protection time of the coating in the 3.5 wt% NaCl solution from less than 4 days to more than 8 days, thus avoiding the local failure of the coating and improving the anticorrosion performance. Besides, the addition of graphene nanosheets at low content also enhanced the physical barrier effect of the coating and prolonged the penetration path of the corrosive medium without destroying the structure of the composite coating. 相似文献
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介绍了钢筋混凝土在自然环境下的腐蚀机理及单组分湿固化聚氨酯防腐涂料在钢筋混凝土等领域的腐蚀保护作用,综述了单组分湿固化聚氨酯防腐涂料在钢筋混凝土构筑物、污水处理系统等领域的应用。 相似文献
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主要介绍了目前我国港口机械设备钢结构用防腐涂料的品种以及应用于海洋重防腐环境下的港口机械涂层防腐配套体系。对港机设备的维护与保养,提出了防腐涂装方案和施工要点,并对涂层的防护寿命进行了论述。 相似文献
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论述了目前评价涂层耐腐蚀性能与失效检测的常用电化学测试方法,指出研究涂层耐腐蚀性能实验室评定方法,是正确评估防腐蚀涂料使用寿命的最佳途径。 相似文献
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Jian Zhang Xiangdong Zhang Zhongyuan Liu Lanhe Zhang Yue Zhao Yuanchun Li Chen Shao Junlian Ren 《应用聚合物科学杂志》2023,140(6):e53459
Water-based anticorrosive coatings have poor water resistance, which easily lead to coating deterioration and metal corrosion. In order to improve the anticorrosion performance of waterborne coating, herein, the polytetrafluoroethylene/dimethyl siloxane/epoxy resin (PTFE/PDMS/EP) hydrophobic anticorrosive coating was prepared by layer-by-layer construction. The spatial structure and microscopic morphology of the hydrophobic coating were analyzed by XRD, FTIR, and SEM. The hydrophobicity and corrosion resistance of the composite coating were analyzed by hydrophobicity test, electrochemical polarization curve, hydrophobicity and corrosion resistance test of the mixed layer, Tafel polarization curves, and AC impedance spectrum. The results showed that the water contact angle of PTFE/PDMS/EP coating reached 141° and the protection efficiency of PTFE/PDMS/EP coating was 98.62%. After soaking for 7 days, the corrosion process still stays at the initial stage, which was mainly due to the good sealing and barrier properties and high anticorrosion efficiency of PTFE/PDMS/EP coating. The coating has high corrosion protection efficiency and long service life, which is of great significance to metal corrosion protection in harsh marine environments. 相似文献