表面技术
錶麵技術
표면기술
SURFACE TECHNOLOGY
2015年
6期
88-92
,共5页
X70管线钢%喹啉季铵盐%高场强离子传导模型%划伤电极法
X70管線鋼%喹啉季銨鹽%高場彊離子傳導模型%劃傷電極法
X70관선강%규람계안염%고장강리자전도모형%화상전겁법
X70 pipeline steel%quaternary ammonium salt%high field ion conduction model%scratching electrode method
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。
目的：在註水介質中加入喹啉緩蝕劑可有效防止石油設備的腐蝕,註水管錶麵形成的鈍化膜可減小註水介質的腐蝕,研究喹啉緩蝕劑在X70鋼錶麵的吸附膜的生長規律。方法採用恆電位快速劃傷法,利用高場彊離子傳導模型對劃傷數據進行計算。結果高場彊離子傳導模型不完全適用于喹啉緩蝕劑在註水介質中X70鋼錶麵的生長過程。通過進一步函數擬閤,髮現模擬註水介質中喹啉緩蝕劑在X70鋼錶麵的吸附膜生長動力學規律遵循J(t)=C1exp(-αt)+C2exp(-βt)+C0。結論添加0.3%,0.6%(質量分數)喹啉緩蝕劑後,電流衰減過程中的電流波動較大,形成的膜穩定性較差,劃痕區域有髮生跼部腐蝕的可能性；添加0.9%(質量分數)喹啉緩蝕劑後,擬閤麯線與實測電流衰減麯線吻閤度達到0.9983,電流波動較小,緩蝕劑吸附膜的穩定性較好。註水介質中,喹啉緩蝕劑含量越高,吸附成膜的質量越好,劃傷前後電流密度差越小,劃痕錶麵吸附膜生長狀態與未劃傷錶麵吸附膜狀態一緻,即在較高含量下喹啉吸附膜在受破損的鋼錶麵能快速吸附成膜,能夠對試樣起到快速全麵的保護作用。
목적：재주수개질중가입규람완식제가유효방지석유설비적부식,주수관표면형성적둔화막가감소주수개질적부식,연구규람완식제재X70강표면적흡부막적생장규률。방법채용항전위쾌속화상법,이용고장강리자전도모형대화상수거진행계산。결과고장강리자전도모형불완전괄용우규람완식제재주수개질중X70강표면적생장과정。통과진일보함수의합,발현모의주수개질중규람완식제재X70강표면적흡부막생장동역학규률준순J(t)=C1exp(-αt)+C2exp(-βt)+C0。결론첨가0.3%,0.6%(질량분수)규람완식제후,전류쇠감과정중적전류파동교대,형성적막은정성교차,화흔구역유발생국부부식적가능성；첨가0.9%(질량분수)규람완식제후,의합곡선여실측전류쇠감곡선문합도체도0.9983,전류파동교소,완식제흡부막적은정성교호。주수개질중,규람완식제함량월고,흡부성막적질량월호,화상전후전류밀도차월소,화흔표면흡부막생장상태여미화상표면흡부막상태일치,즉재교고함량하규람흡부막재수파손적강표면능쾌속흡부성막,능구대시양기도쾌속전면적보호작용。
ABSTRACT: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)+C2 exp(-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 quin-oline 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 quino-line adsorption film could rapidly form on the damaged steel surface at the higher concentration which had a quick and overall pro-tective effect for the sample.
