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《Synthetic Materials Aging and Application》 2011-04
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Evaluation of Sulfur Resistance and Failure Analysis of Fast-opening Blind Sealing Material of High-sulfur Gasfields

ZHANG Fen-dian1,WANG Guo-chang1,CONG Chuan-bo2,CUI Can-can2,LI Wen-bo2,ZHOU Qiong2(1 Gas Production Plant of Puguang Branch Company,Sinopec Zhongyuan Oilfield Company,Dazhou 636156,Sichuan,China;2 Department of Material Science and Engineering,China University of Petroleum(Beijing),Beijing 102249,China)  
This work was discussed on the sealing rubber used in opening blind plate at Pu Guang oil and gas field.We analyzed the changes of the appearance,mechanical properties,microstructure,and infrared spectra before and after the laboratory corrosion experiments with H2S/CO2 environment,and the corrosion mechanism on H2S/CO2 environment of the fast-opening blind plate sealing rubber was interpreted.The results show that three reasons mainly caused the severe loss of the mechanical properties of sealing rubber after corrosion: first,the cracks formed when the gas dissolved in the matrix during presurization expanded in the decompression process;second,during the corrosion progress,the fillers in the material separate with the rubber matrix;the third,the reaction of conjugated double bonds with H2S destroy the cross-linking point of the sealing rubber during the corrosion process.
【Fund】: 国家科技重大专项(编号:2008ZX05017-003-03-01HZ);; 高等学校科技创新工程重大项目培育资金项目(编号:707010);; 国家自然科学基金资助项目(编号:51003121)
【CateGory Index】: TQ336.5
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