张颖,董国强,胡凌艳.注水介质中喹啉缓蚀剂对管线钢的缓蚀作用研究[J].表面技术,2015,44(6):88-92.
ZHANG Ying,DONG Guo-qiang,HU Ling-yan.Research on Corrosion Inhibition Effect of Quinoline Inhibitor in Injection Water Media on Pipeline Steel[J].Surface Technology,2015,44(6):88-92 |
| 注水介质中喹啉缓蚀剂对管线钢的缓蚀作用研究 |
| Research on Corrosion Inhibition Effect of Quinoline Inhibitor in Injection Water Media on Pipeline Steel |
| 投稿时间：2014-12-27 修订日期：2015-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.06.017 |
| 中文关键词: X70 管线钢 喹啉季铵盐 高场强离子传导模型 划伤电极法 |
| 英文关键词:X70 pipeline steel quaternary ammonium salt high field ion conduction model scratching electrode method |
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| 中文摘要: |
| 目的 在注水介质中加入喹啉缓蚀剂可有效防止石油设备的腐蚀,注水管表面形成的钝化膜可减小注水介质的腐蚀,研究喹啉缓蚀剂在 X70 钢表面的吸附膜的生长规律。 方法 采用恒电位快速划伤法,利用高场强离子传导模型对划伤数据进行计算。 结果 高场强离子传导模型不完全适用于喹啉缓蚀剂在注水介质中 X70 钢表面的生长过程。 通过进一步函数拟合,发现模拟注水介质中喹啉缓蚀剂在 X70钢表面的吸附膜生长动力学规律遵循 J(t)= C1exp(-αt)+C2exp(-βt)+C0。 结论 添加 0. 3% ,0. 6% (质量分数)喹啉缓蚀剂后,电流衰减过程中的电流波动较大,形成的膜稳定性较差,划痕区域有发生局部腐蚀的可能性;添加 0. 9% (质量分数)喹啉缓蚀剂后,拟合曲线与实测电流衰减曲线吻合度达到 0. 9983,电流波动较小,缓蚀剂吸附膜的稳定性较好。 注水介质中,喹啉缓蚀剂含量越高,吸附成膜的质量越好,划伤前后电流密度差越小,划痕表面吸附膜生长状态与未划伤表面吸附膜状态一致,即在较高含量下喹啉吸附膜在受破损的钢表面能快速吸附成膜,能够对试样起到快速全面的保护作用。 |
| 英文摘要: |
| Objective To investigate the growth pattern of quinoline adsorption film on X70 steel surface in the context that the injection water with corrosion inhibitors can effectively prevent the oil devices from corrosion and the film formed on the pipeline surface can alleviate the injection water corrosion. Methods The data obtained from scratch test were calculated using high field ion conduction model by potentiostatic rapid scratch method. Results The results showed that the high field ion conduction model was only applicable for a part of adsorbing process of quinoline. The mathematic simulation by further function fitting found that the growth pattern of quinoline adsorption film on X70 steel surface in simulated media followed the equation: J( t)= C1exp(-αt) + C2exp(-βt)+C0. Conclusion At the concentration of 0. 3% , 0. 6% (mass fraction) quinoline, current fluctuated obviously and the stability of the forming film was worse. There was a possibility of local corrosion in scratch area. At the concentration of 0. 9% (mass fraction) quinoline, the goodness of fit between the simulated curve and the true current decay curve reached 0. 9983, the current fluctuated slightly and the stability of inhibitor adsorption film was better. In the injection water media, the content of quinoline was higher, the quality of the forming film was better and the difference of the current density was smaller before and after scratch. The growth state of the adsorption film on the scratch surface and no-scratch surface were in a consistent state. The quinoline adsorption film could rapidly form on the damaged steel surface at the higher concentration which had a quick and overall protective effect for the sample. |
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