用于油气储运防腐的纳米环氧复合涂料的研究

Study on nano epoxy composite coatings for corrosion protection in oil and gas storage and transportation

为减少油气储运中钢材的腐蚀,本文通过3-缩水甘油基丙基三甲氧基硅烷(GTS)和3-氨丙基三甲氧基硅烷(ATS)对纳米黏土进行功能化改性,并采用FTIR、TGA对其结构进行了表征。在环氧树脂中加入功能化纳米黏土,提高了涂层钢的防护性能。通过电化学测试研究了其在氯化物环境中的耐腐蚀性能。与纯环氧树脂涂层(RC=549.51kΩ·cm^(2))相比,经环氧树脂-ATS/黏土复合材料涂层的碳钢具有更高的耐涂覆性(RC=5407.88kΩ·cm^(2)),对所得纳米复合材料的力学性能(硬度和拉伸强度)进行了评价。在环氧树脂涂层中引入ATS/黏土(4wt%)有助于将拉伸强度提高到84.69MPa,比纯环氧树脂涂层提高了25%。电化学和力学性能测试结果表明,由环氧树脂硅烷/黏土组成的涂层具有良好的附着力、显微硬度和防腐性能。在油气储运过程中,采用该新型缓蚀涂层对钢结构进行防腐具有重要意义。

In order to reduce the corrosion of steel in oil and gas storage and transportation,in this paper,the nanoclay was functionalized by 3-glycidylpropyltrimethoxysilane(GTS)and 3-aminopropyltrimethoxysilane(ATS)and structural characterized by FTIR and TGA.The incorporation of functionalized nanoclay into epoxy resin improved the protective properties of coated steel.The corrosion resistance in chloride environment was investigated by electrochemical tests.The mechanical properties(hardness and tensile strength)of the resulting nanocomposites were evaluated on carbon steel coated with epoxy-ATS/clay composites with higher coating resistance(RC=5407.88 kΩ·cm^(2))compared to pure epoxy coating(RC=549.51kΩ·cm^(2)).The introduction of ATS/clay(4wt%)into the epoxy coating helped to increase the tensile strength to 84.69 MPa,which is 25%higher than the pure epoxy coating.Electrochemical and mechanical test results showed that the coating composed of epoxy silane/clay had good adhesion,microhardness,and anticorrosion properties.It is of great significance to use this new corrosion inhibition coating for corrosion protection of steel structures in process of oil and gas storage and transportation.