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Quick selection of aluminum galvanic anodes in oil brine via galvanic current
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作者 HAO Xiao-jun LEI Ying-chun +2 位作者 HOU Hua ZHAO Yu-hong WANG Yi-du 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2017年第4期334-339,共6页
According to dynamics of coupled galvanic anode with carbon steel,the integral of galvanic current vs.time is approximately equal to actual current capacity of galvanic anode.Galvanic current of cast aluminum galvanic... According to dynamics of coupled galvanic anode with carbon steel,the integral of galvanic current vs.time is approximately equal to actual current capacity of galvanic anode.Galvanic current of cast aluminum galvanic anode coupled with carbon steel is tested in3.5%NaCl solution and ambient temperature.Rapid evaluation the performance of galvanic anode using galvanic current is feasible,and the test time is20min.The galvanic current is used to select aluminum galvanic anodes in oil brine,and then test the galvanic anodes with impressed current test method.The result shows,the performance of galvanic anodes degrads in oil brine,but has not much difference in the two media to the preferable anodes,and the optimal galvanic anode is gained. 展开更多
关键词 quick selection aluminum galvanic anode galvanic current oil brine
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Discussion on Cathodic Protection of HZ 21-1 Platform
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作者 Chen Lisheng Engineer, Nanhai East Oil Corporation. CNOOC, 510240 Guangzhou 《China Ocean Engineering》 SCIE EI 1992年第2期243-250,共8页
The environmental conditions around the first offshore HZ 21- 1 steel wellhead platform in the South China Sea are characterized by deep water, frequent typhoons, rough waves, high water temperature, severely corrosiv... The environmental conditions around the first offshore HZ 21- 1 steel wellhead platform in the South China Sea are characterized by deep water, frequent typhoons, rough waves, high water temperature, severely corrosive seawater, and thick fouling organism attachments. The design and effectiveness of galvanic anode protection system are presented, and several methods are described, which are the calculation method of the protective current density considering the variation of water depth, the method of determining protection parameters considering various factors, the arrangement of anodes based on potential distribution and current requirements at different water depths, and the method of anode installation. Finally the effect of the accuracy of selected cathodic protection parameters on the economic benefits of offshore projects is also discussed.. 展开更多
关键词 offshore platform seawater corrosion cathodic protection galvanic anode protective current density
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