原油储罐防腐蚀用环氧高固体分涂料的制备

发布时间：2018-08-14 18:16

【摘要】：涂层防护是原油储罐防腐蚀的主要方法之一。随着石化行业的发展,原油储罐对防腐涂料的需求量也日益加大。传统溶剂型涂料在施工过程中会挥发大量有机溶剂对环境和工人造成巨大损害,且其一次性成膜厚度较低,施工时往往要多次涂覆导致效率低下,开发环境友好型涂料势在必行。高固体分涂料固含量高,可挥发性有机物少且一次成膜厚度较高,符合原油储罐对于防腐涂料的要求。环氧涂料因其优异的防腐性能是原油储罐防腐涂料的最佳选择。为得到性能最佳的涂料,本研究以自制环氧高固体分涂料为研究对象,测定了涂层的各项基本性能。同时,通过测定涂层在3.5%NaCl溶液中浸泡的交流阻抗谱及涂层在5%H_2SO_4溶液、5%NaOH溶液及汽油中的静态挂片实验等方法,分析了氧化铝粉、硅烷偶联剂改性活性硅微粉等陶瓷填料及石墨烯纳米片对涂层性能尤其是防腐性能的影响,得到如下结论:(1)由于涂料采用大、小分子量环氧树脂复配为成膜物质,涂层的粘度适中,且附着力、柔韧性均表现良好。同时,涂料固含量达到78%以上,符合高固体分涂料的定义。(2)陶瓷填料可显著提高涂层在3.5%NaCl溶液中浸泡时的涂层电阻并延长其失效周期,而石墨烯纳米片的加入,则可进一步提高涂层浸泡时的生命周期并使漆膜表面在浸泡后期仍保持完整。(3)添加陶瓷填料及石墨烯纳米片的涂层在5%H_2SO_4溶液、5%NaOH溶液及汽油中的均匀腐蚀速率最低,其耐介质性最好。
[Abstract]:Coating protection is one of the main methods for corrosion prevention of crude oil storage tanks. With the development of petrochemical industry, the demand for anticorrosive coatings for crude oil storage tanks is increasing day by day. The traditional solvent-based coatings will volatilize a large number of organic solvents in the process of construction, which will cause great damage to the environment and workers, and its one-off film formation thickness is low. It is imperative to develop environmental friendly coatings. The solid content of high solid component coatings is high, the volatile organic compounds are less and the thickness of primary film is higher, which meets the requirements of crude oil storage tanks for anticorrosive coatings. Epoxy coating is the best choice for crude oil tank anticorrosive coating because of its excellent anticorrosion property. In order to obtain the best coating, the basic properties of the coating were determined by taking the high solid epoxy coating as the research object. At the same time, the aluminum oxide powder was analyzed by measuring the AC impedance spectrum of the coating immersed in 3.5%NaCl solution and the static hanging test of the coating in the 5%H_2SO_4 solution and in the gasoline solution. The effects of silane coupling agent on the coating properties, especially anticorrosive properties, of ceramic fillers and graphene nanoparticles modified by silane coupling agent. The conclusions are as follows: (1) due to the large coating, the low molecular weight epoxy resin is mixed as the film-forming material. The viscosity of the coating is moderate and the adhesion and flexibility are good. At the same time, the solid content of the coating is more than 78%, which accords with the definition of high solid subdivision coating. (2) Ceramic filler can significantly increase the coating resistance and prolong the failure period when the coating is immersed in 3.5%NaCl solution, while the addition of graphene nanocrystals, It can further increase the life cycle of the coating and keep the coating surface intact at the later stage of soaking. (3) the coating with ceramic filler and graphene nanochip has the lowest uniform corrosion rate in the 5%H_2SO_4 solution of 5NaOH solution and gasoline. Its resistance to media is the best.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE988;TQ637

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