【摘要】：涂層防護是原油儲罐防腐蝕的主要方法之一。隨著石化行業(yè)的發(fā)展,原油儲罐對防腐涂料的需求量也日益加大。傳統(tǒng)溶劑型涂料在施工過程中會揮發(fā)大量有機溶劑對環(huán)境和工人造成巨大損害,且其一次性成膜厚度較低,施工時往往要多次涂覆導(dǎo)致效率低下,開發(fā)環(huán)境友好型涂料勢在必行。高固體分涂料固含量高,可揮發(fā)性有機物少且一次成膜厚度較高,符合原油儲罐對于防腐涂料的要求。環(huán)氧涂料因其優(yōu)異的防腐性能是原油儲罐防腐涂料的最佳選擇。為得到性能最佳的涂料,本研究以自制環(huán)氧高固體分涂料為研究對象,測定了涂層的各項基本性能。同時,通過測定涂層在3.5%NaCl溶液中浸泡的交流阻抗譜及涂層在5%H_2SO_4溶液、5%NaOH溶液及汽油中的靜態(tài)掛片實驗等方法,分析了氧化鋁粉、硅烷偶聯(lián)劑改性活性硅微粉等陶瓷填料及石墨烯納米片對涂層性能尤其是防腐性能的影響,得到如下結(jié)論:(1)由于涂料采用大、小分子量環(huán)氧樹脂復(fù)配為成膜物質(zhì),涂層的粘度適中,且附著力、柔韌性均表現(xiàn)良好。同時,涂料固含量達(dá)到78%以上,符合高固體分涂料的定義。(2)陶瓷填料可顯著提高涂層在3.5%NaCl溶液中浸泡時的涂層電阻并延長其失效周期,而石墨烯納米片的加入,則可進(jìn)一步提高涂層浸泡時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納米片的涂層在5%H_2SO_4溶液、5%NaOH溶液及汽油中的均勻腐蝕速率最低,其耐介質(zhì)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.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE988;TQ637

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