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油套管钢化学镀Ni-P的抗CO₂腐蚀性能

RESISTANCE TO CO₂ CORROSION OF ELECTROLESS PLATING OF Ni-P COATING ON STEEL N80

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【Author】 YE Chun-yan~(1,3),WANG Zhan-bang~2,YAN Mi-lin~3,LI Ping-quan~31.College of Mechanical Engineering,Xi’an Petroleum University ,Xi’an 710065;2.College of Energy,Xi’an science and Technology University,Xi’an 710054;3.Tubular Goods Research Center of CNPC,Xi’an 710065

【机构】西安石油大学机械工程学院；西安科技大学能源学院；中国石油天然气集团公司管材研究所；中国石油天然气集团公司管材研究所西安710065 中国石油天然气集团公司管材研究所；西安710065；西安710054；西安710065；

【摘要】利用电化学腐蚀试验测试装置及静态高温高压釜,通过线性极化法和Tafel外推法、腐蚀失重法评价了裸样N80油套管钢及其镍磷镀防腐层的抗CO2腐蚀性能.结果表明,在抗CO2腐蚀方面,Ni-P镀层的腐蚀趋势比裸样的腐蚀趋势小,腐蚀电流密度和腐蚀速率低;且电化学测试结果与高压釜测试结果一致,即化学镀Ni-P试样的耐蚀性优于裸样的耐蚀性.更多还原

【Abstract】 By means of electrochemical measurement and static high temperature and high pressure corrosion test,CO₂ corrosion behavior of N80 steel without and with Ni-P coating was investigated in terms of line polarization curve with Tafel extension and corrosion weight-loss.The results show that the resistance to CO₂ corrosion of Ni-P coated N80 steel is better than the bare N80 steel,and of the former the corrosion current density and corrosion rate are lower than that of the later sample.The results of the electrochemical experiment and autoclave measurement are consistent obviously,that is to say, the Ni-P coating possesses much better resistance to CO₂ corrosion than the bare sample.更多还原