盐酸酸化缓蚀剂PA-CI的缓蚀性能评价及机理研究
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摘要
以有机胺、甲醛和有机酮为原料合成了曼尼希碱酸化缓蚀剂PA-CI。通过红外光谱对合成产物的结构进行了表征,并分别采用静态挂片失重法和电化学分析法评价了其缓蚀性能与机理。静态失重法实验结果表明,在20%盐酸中,缓蚀剂加量为0.8%时,N80钢的腐蚀速率为2.14 g/(m~2·h);电化学研究结果表明,该缓蚀剂是以抑制阳极为主、作用机理为几何覆盖效应的混合型缓蚀剂,其在N80钢片表面上的吸附符合Langmuir单分子层等温吸附。通过相关热力学与腐蚀动力学参数的计算,进一步阐述了该缓蚀剂的吸附机理,其在N80表面的吸附为化学吸附,且吸附状态是无序化的。
According to the Mannich reaction principle, the corrosion inhibitor PA-CI had been synthesized using Formaldehyde, acetophenone and diethanolamine as raw materials. PA-CI was well characterized by IR spectrum, besides, its inhibition performance and mechanism was studied by the methods of weight-loss and electrochemical. Mass loss results suggested that the corrosion rate of N80 steel plate in 20%HCl solution was 2.14 g/(m~2.h) when the dosage of inhibitor added was 0.8%,which is higher than the oil industry standard SY/T 5405-1996 as a first class corrosion inhibitor product. Electrochemical studies indicated that the corrosion inhibitor mainly controlled anodic processes and the mechanism was mainly geometric overlay effect. The adsorption on the surface of N80 steel sheet conforms to the isotherm adsorption of Langmuir monolayer. The adsorption mechanism of the corrosion inhibitor is further explained by the calculation of related thermodynamics and corrosion kinetic parameters: it is chemically adsorbed on the surface of N80, and the adsorption state is disordered.
According to the Mannich reaction principle, the corrosion inhibitor PA-CI had been synthesized using Formaldehyde, acetophenone and diethanolamine as raw materials. PA-CI was well characterized by IR spectrum, besides, its inhibition performance and mechanism was studied by the methods of weight-loss and electrochemical. Mass loss results suggested that the corrosion rate of N80 steel plate in 20%HCl solution was 2.14 g/(m~2.h) when the dosage of inhibitor added was 0.8%,which is higher than the oil industry standard SY/T 5405-1996 as a first class corrosion inhibitor product. Electrochemical studies indicated that the corrosion inhibitor mainly controlled anodic processes and the mechanism was mainly geometric overlay effect. The adsorption on the surface of N80 steel sheet conforms to the isotherm adsorption of Langmuir monolayer. The adsorption mechanism of the corrosion inhibitor is further explained by the calculation of related thermodynamics and corrosion kinetic parameters: it is chemically adsorbed on the surface of N80, and the adsorption state is disordered.
引文
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[21] 任帅,陈旭,马贵阳,等.一种咪唑啉类缓蚀剂的合成及其缓蚀性能评价[J].腐蚀科学与防护技术,2016,28(3):199-205.
[2] 邱海燕, 李建波. 酸化缓蚀剂的发展现状及展望[J]. 腐蚀科学与防护技术, 2005,17(4):255.
[3] 杨永飞, 赵修太, 邱广敏, 等.国内酸化缓蚀剂的现状[J].石油化工腐蚀与防护,2007,24(5):6-9.
[4] 王新裕,刘建仪,李颖川,等.高温酸化缓蚀剂CPA-10的合成及复配研究[J].应用化工,2012,41(3):389-393.
[5] 孙铭勤, 张贵才, 葛际江, 等.盐酸酸化缓蚀剂DS-1的合成及性能评价[J]. 钻采工艺,.2005, 28(6):90-93.
[6] 李谦定, 李恒娟, 卢永斌. 一种盐酸酸化缓蚀剂的合成及性能评价[J]. 油田化学, 2011, 28(2):206-209.
[7] 李善建, 于洪江, 王京光. 一种曼尼希碱型盐酸酸化缓蚀剂的合成及缓蚀性能[J].油田化学,2008,25(2):118-121.
[8] 蒋平,赵力云,万朝晖,等.喹啉型季铵盐缓蚀性能评价[J].油田化学,2011,28(2):219-223.
[9] 方晓君,张娟涛,陈长风,等.新型希夫碱酸化缓蚀剂在不同温度盐酸介质中对N80钢的缓蚀性能[J].腐蚀与防护,2012,33(7):552-554,622.
[10] 王红艳,卢永斌,白方林,等.一种新型Mannich碱酸化缓蚀剂的合成及性能评价[J].腐蚀科学与防护技术,2013,25(2):133-137.
[11] 曹楚南. 腐蚀电化学原理[M]. 北京:化学工业出版社,2004.
[12] 曹楚南, 张鉴清. 电化学阻抗谱导论[M].北京:科学出版社, 2002.
[13] 李善建.一种适于P110钢席夫碱盐酸酸化缓蚀剂的合成及应用性能评价[J].精细石油化工, 2014,31(3):68-71.
[14] WANG H L ,FAN H B,ZHENG J S. Corrosion inhibition of mild steel in hydrochloric acid solution by a mercapto-triazole compound[J]. Materials Chemistry and Physics,2003,77(3):655-661.
[15] BAYOUMI F M, GHANEM W A. Corrosion inhibition of mild steel using naphthalene disulfonic acid[J]. Materials Letters,2005,59(29/30):3806-3809.
[16] LARABI L, BENALI O, MEKELLECHE S M,et al. 2-Mercapto-1-methylimidazole as corrosion inhibitor for copper in hydrochloric acid[J]. Applied Surface Science,2006,253(3):1371-1378.
[17] BENTISS F, LEBRINI M,LAGRENéE M. Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in mild steel/2,5-bis( n -thienyl)-1,3,4-thiadiazoles/hydrochloric acid system[J]. Corrosion Science,2005,47(12):2915-2931.
[18] EHTERAM A N, AL-MOUBARAKI A H. Thermodynamic study of metal corrosion and inhibitor adsorption processes in mild steel/1-methyl-4[4′(-X)-styryl pyridinium iodides/hydrochloric acid systems[J]. Materials Chemistry and Physics,2008,110(1):145-154.
[19] 江依义,陈宇,叶正扬,等.十七烯基咪唑啉的制备及其缓蚀性能评价[J].中国腐蚀与防护学报,2013,33(4):325-330.
[20] 江依义. 酸化缓蚀剂的合成及其缓蚀性能研究[D].杭州:浙江大学,2013.
[21] 任帅,陈旭,马贵阳,等.一种咪唑啉类缓蚀剂的合成及其缓蚀性能评价[J].腐蚀科学与防护技术,2016,28(3):199-205.