有机—无机杂化改性环氧树脂涂料的制备及其在采出水中的性能
发布时间：2018-10-22 17:09
【摘要】：油田采出水是石油开采中的副产物,因其成分复杂,产量大,具有高温,高矿化度,低pH值等特点,是油田防腐的研究重点。环氧树脂类涂料是重要的有机涂料之一,但其韧性及耐高温性能不佳,对C1-的屏蔽作用较小,影响了其在油田采出水中的应用。针对这个情况,本论文研制一种有机-无机杂化硅材料改性环氧树脂涂料,使其具有有机材料和无机材料的共同优点,为油田采出水环境提供一种新的防腐蚀涂料,并通过研究涂料的物理性能、耐热性、耐化学品性能及在油田采出水中耐腐蚀性,得到改性涂料在油田采出水中的防腐蚀机理。 用溶胶-凝胶法制备有机-无机杂化硅溶胶作为环氧树脂涂料改性剂。通过单因素实验和正交实验确定了有机-无机杂化硅溶胶的最佳合成条件和最佳配比：KH-560(20mL)、 TEOS(10mL)、异丙醇(20mL)、去离子水(2.1mL)、pH值为10,去离子水和异丙醇混合液滴加速率为0.5mL/min,常温水解2h,70℃缩聚6h。此条件下合成的有机-无机杂化硅溶胶在常温下的凝胶时间达到50d,且其固含量达到37%。 制备了空白环氧树脂清漆和9种有机-无机杂化硅改性环氧树脂清漆,通过单因素实验确定了环氧树脂清漆的固化剂用量和混合溶剂用量,研究了改性剂对固化时间和固化度的影响。对清漆的物理性能,耐化学品性能,热稳定性能,耐热水性能及在模拟油田采出水中的耐腐蚀性能进行测试,结果表明：有机-无机杂化硅溶胶与环氧树脂质量比为5：4时各项性能最佳,得到的杂化改性环氧树脂清漆的附着力为1级、硬度为0.993,抗冲击强度为40kg·cm两次分解温度分别达到200℃和400℃；耐化学品性能和耐热水性能相比纯环氧树脂涂料有较大提高；EIS测试得到在40℃模拟油田采出水中浸泡1d,7d的涂层电阻分别达到107Ω/cm2和104Ω/cm2,比空白环氧树脂涂料高出两个数量级。 制各了有机-无机杂化改性环氧树脂色漆。对其物理性能,耐化学品性能进行测试。通过EIS测试,高温高压釜实验研究了色漆在模拟油田采出水中的性能。结果表明：有机-无机杂化改性环氧树脂色漆抗冲击强度达到45cm-kg、优于清漆；耐化学品性能较清漆好,在10%HCl溶液和10%NaOH溶液中浸泡7d无变化；EIS测试得到,在40℃,50℃和60℃下,随着浸泡时间增加,涂层电阻减小,50℃下涂层电阻减小最慢,耐腐蚀性能最好；3个温度下浸泡14d时色漆才出现Warburg阻抗,涂层电阻仍能达到105-106Ω/cm2,比清漆在相同温度下浸泡7d的涂层电阻大；色漆在P(CO2)=2MPa, T=100℃高温高压釜浸泡48h后,表而无起泡,无脱落现象,SEM和EDS分析得到其表面仅有少量针孔出现,说明在此环境下耐腐蚀性能良好。
[Abstract]:Oilfield produced water is a by-product in petroleum exploitation. Because of its complex composition, large output, high temperature, high salinity and low pH value, it is the focus of research on oil field anticorrosion. Epoxy resin coating is one of the important organic coatings, but its toughness and high temperature resistance are not good, and the shielding effect of C1- is small, which affects its application in oilfield produced water. In this paper, an organic-inorganic hybrid silicon modified epoxy resin coating is developed, which has the common advantages of organic and inorganic materials, and provides a new anticorrosive coating for oilfield produced water environment. By studying the physical properties, heat resistance, chemical resistance and corrosion resistance of the modified coatings in oilfield produced water, the corrosion resistance mechanism of the modified coatings in oilfield produced water was obtained. Organic-inorganic hybrid silica sol was prepared by sol-gel method as epoxy resin coating modifier. The optimum conditions and ratio of organic-inorganic hybrid silica sol were determined by single factor experiment and orthogonal experiment: KH-560 (20mL), TEOS (10mL), isopropanol (20mL), deionized water (2.1mL), pH = 10, acceleration rate of mixed droplet of deionized water and isopropanol was 0.5 mL / min). The temperature hydrolysis is 2 h and the temperature is 70 鈩，
本文编号：2287784
[Abstract]:Oilfield produced water is a by-product in petroleum exploitation. Because of its complex composition, large output, high temperature, high salinity and low pH value, it is the focus of research on oil field anticorrosion. Epoxy resin coating is one of the important organic coatings, but its toughness and high temperature resistance are not good, and the shielding effect of C1- is small, which affects its application in oilfield produced water. In this paper, an organic-inorganic hybrid silicon modified epoxy resin coating is developed, which has the common advantages of organic and inorganic materials, and provides a new anticorrosive coating for oilfield produced water environment. By studying the physical properties, heat resistance, chemical resistance and corrosion resistance of the modified coatings in oilfield produced water, the corrosion resistance mechanism of the modified coatings in oilfield produced water was obtained. Organic-inorganic hybrid silica sol was prepared by sol-gel method as epoxy resin coating modifier. The optimum conditions and ratio of organic-inorganic hybrid silica sol were determined by single factor experiment and orthogonal experiment: KH-560 (20mL), TEOS (10mL), isopropanol (20mL), deionized water (2.1mL), pH = 10, acceleration rate of mixed droplet of deionized water and isopropanol was 0.5 mL / min). The temperature hydrolysis is 2 h and the temperature is 70 鈩，
本文编号：2287784
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