Pitting in the Water/Hydrocarbon Boundary Region of Pipelines-Effect of Corrosion Inhibitors
The boundary conditions leading to pitting in pipelines in the water/hydrocarbon (HC) interface region of the bottom-of-the-line (BOL) liquid were studied using electrochemical noise (ECN) with specially developed evaluation software.It was proved that intermittent surface wetting with HC and brine can increase the likelihood of pitting in the HC/brine boundary region of the pipeline steel.The frequency of the phase boundary movement affects the pitting intensity.Corrosive effects were strongly dependent on the presence of inhibitors, its concentration and phase behaviour influenced by isopropanol.Increasing the inhibitor concentration mitigates pit formation in all surface regions.ECN measurements in combination with the in-house developed evaluation software proved to be a sensitive tool to quantify parameter effects in short exposure times.
pipelines steel pitting, CO2 water/hydrocarbon inhibitors electrochemical noise
Guenter Schmitt Gilda Karbasi Srdjan Ne(s)i(c) Rudolf Hausler Brian Kinsella Bruce Brown
IFINKOR-Institute for Maintenance and Corrosion Protection Technologies n.f.p.Ltd.Kalkofen 4,D-58638 IFINKOR-Institute for Maintenance and Corrosion Protection Technologies n.f.p.Ltd.Kalkofen 4,D-58638 Institute for Corrosion and Multiphase Technology Department of Chemical and Biomolecular Engineerin Blade Energy Partners 8081 Diane Drive,Kaufman,Texas 75142,USA
国内会议
2013中国国际管道会议暨第一届中国管道与储罐腐蚀与防护学术交流会
廊坊
英文
424-431
2013-09-01（万方平台首次上网日期，不代表论文的发表时间）