水溶性咪唑啉缓蚀剂对X80管线钢的缓蚀性能研究
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摘要
为了研究动态条件下水溶性咪唑啉缓蚀剂对管线钢的缓蚀性能,以X80管线钢为研究对象,采用旋转圆柱电极装置结合电化学法和失重法,研究X80管线钢在含不同水溶性咪唑啉缓蚀剂浓度下的多相流(0.5%石英砂+3%NaCl的水溶液)中的冲刷腐蚀行为。对失重量、电化学阻抗谱以及Tafel曲线进行分析的结果表明,咪唑啉缓蚀剂对金属的阳极反应以及阴极反应都有明显的抑制作用:当咪唑啉缓蚀剂的质量分数低于0.8%时,冲刷腐蚀速率随着缓蚀剂的增加而降低;当缓蚀剂的质量分数为0.8%时,金属表面吸附的缓蚀剂达到饱和状态,缓蚀作用最强,冲刷腐蚀速率最低;当缓蚀剂的质量分数大于0.8%时,冲刷腐蚀速率上升。作为混合型缓蚀剂的水溶性咪唑啉,通过其"几何覆盖效应"对X80管线钢起到了缓蚀作用,因而咪唑啉缓蚀剂的最佳质量分数为0.8%。
In order to study the corrosion inhibition performance of water-soluble imidazoline inhibitor for pipeline steel under dynamic conditions,taking X80 pipeline steel as the study object,the rotating cylindrical electrode method and weight loss method are used to study the erosion-corrosion of X80 pipeline steel in multiphase flow(0.5% silica sand + 3% NaCl) with different concentrations of water-soluble imidazoline inhibitor. Through analysis of weight loss,electrochemical impedance spectroscopy and Tafel curve,results show that the imidazoline inhibitor has an obvious inhibitory effect on the anodic and cathodic reactions of metals. When the concentration of imidazoline inhibitor is lower than0.8%, the erosion-corrosion rate would decrease with the increase of inhibitor. When the inhibitor concentration is 0.8%, the corrosion inhibitor adsorbed on the metal surface would reach a saturation state,and the corrosion inhibition effect is the strongest while the erosion-corrosion rate is the lowest.When the inhibitor concentration is more than 0.8%, the erosion-corrosion rate would increase.Therefore, the water-soluble imidazoline corrosion inhibitor is mixed corrosion inhibitor, which can inhibit the corrosion of X80 steel through geometric coverage effect. The optimum dosage of imidazoline is 0.8%.
In order to study the corrosion inhibition performance of water-soluble imidazoline inhibitor for pipeline steel under dynamic conditions,taking X80 pipeline steel as the study object,the rotating cylindrical electrode method and weight loss method are used to study the erosion-corrosion of X80 pipeline steel in multiphase flow(0.5% silica sand + 3% NaCl) with different concentrations of water-soluble imidazoline inhibitor. Through analysis of weight loss,electrochemical impedance spectroscopy and Tafel curve,results show that the imidazoline inhibitor has an obvious inhibitory effect on the anodic and cathodic reactions of metals. When the concentration of imidazoline inhibitor is lower than0.8%, the erosion-corrosion rate would decrease with the increase of inhibitor. When the inhibitor concentration is 0.8%, the corrosion inhibitor adsorbed on the metal surface would reach a saturation state,and the corrosion inhibition effect is the strongest while the erosion-corrosion rate is the lowest.When the inhibitor concentration is more than 0.8%, the erosion-corrosion rate would increase.Therefore, the water-soluble imidazoline corrosion inhibitor is mixed corrosion inhibitor, which can inhibit the corrosion of X80 steel through geometric coverage effect. The optimum dosage of imidazoline is 0.8%.
引文
[1]刘清云,高峰,吾买尔江,等.天然气集输缓蚀剂的研究进展[J].广东化工,2010,38(12):74-75.LIU Qingyun,GAO Feng,WU Maierjiang,et al.Research progress of inhibitor for storage and transportation of oil and gas[J].Guangzhou Chemical Industary,2010,38(12):74-75.
[2]赵起锋,徐慧,尚跃再,等.咪唑啉类缓蚀剂缓蚀协同效应的研究现状及展望[J].全面腐蚀控制,2016,30(11):81-85.ZHAO Qifeng,XU Hui,SHANG Yuezai,et al.Review and prospect of imidazolinecorrosion inhibitor synergistic effect[J].Total Corrosion Control,2016,30(11):81-85.
[3]张军,于维钊,燕友果,等.咪唑啉缓蚀剂在Fe(001)表面吸附行为的分子动力学模拟[J].物理化学学报,2010,26(5):1385-1390.ZHANG Jun,YU Weizhao,YAN Youguo,et al.Molecular dynamics simulation of the adsorption behavior of imidazolinecorrosion inhibitors on a Fe(001)surface[J].Acta hysico-Chimica Sinica,2010,26(5):1385-1390.
[4]张军,李中谱,赵卫民,等.咪唑啉缓蚀剂缓蚀性能的理论研究[J].石油学报(石油加工),2008,24(5):598-604.ZHANG Jun,LI Zhongpu,ZHAO Weimin,et al.Theoretical study on corrosion in hibition performance of imidazoline inhibitors[J].Acta Petrolei Sinica(Petroleum Processing Setion),2008,24(5):598-604.
[5]王玉娜,聂凯斌,杨冬,等.模拟海水淡化一级反渗透产水中咪唑啉缓蚀剂对20#碳钢的缓蚀行为[J].中国腐蚀与防护学报,2015,35(5):407-414.WANG Yuna,NIE Kaibin,YANG Dong,et al.Corrosion inhibition of imidazoline on 20#carbon steel in simulation seawater reverse osmosis product water[J].Journal of Chinese Society for Corrosion and Protection.2015,35(5):407-414.
[6]朱永艳,林嘉欣,谈燕.绿色缓蚀剂在海水中对X80碳钢的缓蚀性能研究[J].广州化工,2016,44(17):69-71.ZHU Yongyan,LIN Jiaxin,TAN Yan.Study on inhibition effects of the green inhibitors on corrosion behavior of X80carbon steel in seawater[J].Guangzhou Chemical Industary,2016,44(17):69-71.
[7]DRTEGA-TOLEDOA D M,GONZALEZ-RODRIGUEZB JG,CASALESC M,et al.The CO2corrosion inhibition of a high strength pipeline steel by hydroxyethyl imidazoline[J].Materials Chemistry and Physics,2010,122(2):485-490.
[8]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,1994:28-29.CAO Chunan.Principles of corrosion electrochemistry[M].Beijing:Chemical Industry Press,1994:28-29.
[9]付薇,梁亮,郑敬生,等.Gemini型咪唑啉双季铵盐金属缓蚀剂的合成及其性能[J].应用化学,2009,26(12):1422-1427.FU Wei,LIANG Liang,ZHENG Jingsheng,et al.Synthesis and properties of Gemini imidazolinebiquaternary ammonium salt corrosion inhibitor[J].Applied Chemistry,2009,26(12):1422-1427.
[2]赵起锋,徐慧,尚跃再,等.咪唑啉类缓蚀剂缓蚀协同效应的研究现状及展望[J].全面腐蚀控制,2016,30(11):81-85.ZHAO Qifeng,XU Hui,SHANG Yuezai,et al.Review and prospect of imidazolinecorrosion inhibitor synergistic effect[J].Total Corrosion Control,2016,30(11):81-85.
[3]张军,于维钊,燕友果,等.咪唑啉缓蚀剂在Fe(001)表面吸附行为的分子动力学模拟[J].物理化学学报,2010,26(5):1385-1390.ZHANG Jun,YU Weizhao,YAN Youguo,et al.Molecular dynamics simulation of the adsorption behavior of imidazolinecorrosion inhibitors on a Fe(001)surface[J].Acta hysico-Chimica Sinica,2010,26(5):1385-1390.
[4]张军,李中谱,赵卫民,等.咪唑啉缓蚀剂缓蚀性能的理论研究[J].石油学报(石油加工),2008,24(5):598-604.ZHANG Jun,LI Zhongpu,ZHAO Weimin,et al.Theoretical study on corrosion in hibition performance of imidazoline inhibitors[J].Acta Petrolei Sinica(Petroleum Processing Setion),2008,24(5):598-604.
[5]王玉娜,聂凯斌,杨冬,等.模拟海水淡化一级反渗透产水中咪唑啉缓蚀剂对20#碳钢的缓蚀行为[J].中国腐蚀与防护学报,2015,35(5):407-414.WANG Yuna,NIE Kaibin,YANG Dong,et al.Corrosion inhibition of imidazoline on 20#carbon steel in simulation seawater reverse osmosis product water[J].Journal of Chinese Society for Corrosion and Protection.2015,35(5):407-414.
[6]朱永艳,林嘉欣,谈燕.绿色缓蚀剂在海水中对X80碳钢的缓蚀性能研究[J].广州化工,2016,44(17):69-71.ZHU Yongyan,LIN Jiaxin,TAN Yan.Study on inhibition effects of the green inhibitors on corrosion behavior of X80carbon steel in seawater[J].Guangzhou Chemical Industary,2016,44(17):69-71.
[7]DRTEGA-TOLEDOA D M,GONZALEZ-RODRIGUEZB JG,CASALESC M,et al.The CO2corrosion inhibition of a high strength pipeline steel by hydroxyethyl imidazoline[J].Materials Chemistry and Physics,2010,122(2):485-490.
[8]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,1994:28-29.CAO Chunan.Principles of corrosion electrochemistry[M].Beijing:Chemical Industry Press,1994:28-29.
[9]付薇,梁亮,郑敬生,等.Gemini型咪唑啉双季铵盐金属缓蚀剂的合成及其性能[J].应用化学,2009,26(12):1422-1427.FU Wei,LIANG Liang,ZHENG Jingsheng,et al.Synthesis and properties of Gemini imidazolinebiquaternary ammonium salt corrosion inhibitor[J].Applied Chemistry,2009,26(12):1422-1427.