盐水钻井液中钼酸盐系缓蚀剂对钻杆缓蚀的影响  

Corrosion-Inhibition of Drill Pipe Made of G105 Steel in Saltwater Drilling Fluid by Molybdate-Based Combined Inhibitor

作　　者：宋学锋[1] 黄琳[2] 周永璋[1] 魏无际[1] 朱承飞[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]襄樊学院化工系,湖北襄樊441000

出　　处：《材料保护》2006年第2期59-62,共4页Materials Protection

摘　　要：通过电化学阻抗谱(EIS)研究了钼酸盐系缓蚀剂在盐水钻井液中对G105钢钻杆缓蚀的影响,以寻求该体系中较佳的缓蚀方案,并用Zview2.1软件对试验数据进行了处理。结果表明,按钼酸盐含硅化合物有机胺B=141(质量比)复配而成的缓蚀剂,可以达到低成本、高缓蚀率的效果;并通过失重法利用室内动态模拟试验对最优配方进行了验证,证明复配缓蚀剂的缓蚀率接近95·0%,明显高于单组分缓蚀剂。Electrochemical impedance spectroscopy was used to investigate the inhibitive action of molybdate-based combined inhibitor to the drill pipe made of G105 steel in saltwater drilling fluid.The optimized formulation of the combined inhibitor was determined,while its effectiveness in corrosion-inhibition of the drilling pipe was verified making use of dynamic simulation test (weight loss method) in lab.Results showed that the combined inhibitor composed of molybdate,Si-containing compound,and amine B at a mass fraction of 1:4:1 was superior in terms of the performance-to-cost ratio and showed good inhibitive effect to the drilling pipe.In particular,the combined inhibitor had an inhibitive efficiency as much as 95.0%,which was much higher than that of single-component corrosion inhibitors.

关 键 词：钼酸盐系复配缓蚀剂 缓蚀 钻杆 G105钢 电化学阻抗 盐水钻井液 

分 类 号：TG174.42[金属学及工艺—金属表面处理]