分离器用新型铝基牺牲阳极的研制  

Development of a New Type of Aluminum-Based Sacrificial Anode for Separator

作　　者：奚运涛 陈文浩 刘锐[2] 贺建国[3] 胥珊娜 XI Yun-tao;CHEN Wen-hao;LIU Rui;HE Jian-guo;XU Shan-na(School of Material Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;National Engineering Lab for Exploration and Development of Low-Permeability Oil&Gas Fields,Oil&Gas Technology Research Institute,Changqing Oilfield Company,Xi’an 710018,China;Machinery Manufacturing Plant,Changqing Oilfield Company,Xi’an 710201,China)

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065 [2]长庆油田公司油气工艺研究院低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]长庆油田分公司机械制造总厂,陕西西安710201

出　　处：《材料保护》2021年第5期89-93,共5页Materials Protection

基　　金：中国石油科技创新基金研究项目(2018D-5007-0216);陕西省教育厅科研计划项目资助(18JK0604);陕西省重点学科专项资金资助项目(YS37020203);西安石油大学青年科技创新基金项目(0105/290088272)。

摘　　要：针对油气田分离器用铝基牺牲阳极出现的电流效率低和局部掉块问题,采用正交试验法,依据国家标准加入不同含量的Zn,In,Mg和Ti等合金,开展合金元素含量对阳极电流效率及溶解性能影响规律研究,研制新型高效铝基牺牲阳极。结果表明:Mg和Zn对电流效率的影响较大,In和Ti影响较小,各元素含量的变化对电流效率的影响趋势不同。Mg含量是影响阳极腐蚀均匀性的主要因素,Mg在铝合金阳极中会形成第二相,导致表面局部电位发生变化,进而形成微电池,加速局部腐蚀;而Ti具有细化晶粒的作用;若Mg和Ti 2种元素搭配不当,会导致局部偏析,发生掉块问题。正交试验极差法分析可知,阳极的最优配方为0.5%Mg-4%Zn-0.035%In-0.045%Ti,能够显著提高阳极的电流效率,改善试样溶解的均匀性。The aluminum alloy sacrificial anode used in oil and gas field separators has the problems of low current efficiency and local block loss during the service.According to the national standard,Zn,In,Mg and Ti with different contents were added in the alloy and the influences of alloying element contents on anode current efficiency and dissolution performance were studied by means of orthogonal experiment method to develop a new kind of high efficiency sacrificial anode.Results showed that the effect of Mg and Zn on the current efficiency was greater than that of In and Ti,and the influence trend of the change of each element content on the current efficiency was different.Mg content was the main factor influencing anode corrosion uniformity,which formed a second phase in the aluminum alloy anode,leading to changes in the local surface potential,and then forming a local micro-battery,eventually,the local corrosion of the anode surface was accelerated.Ti element played a role in the grain refinement.If the two contents of Mg and Ti were not properly matched,it would cause serious local segregation,causing the anode falling-block problem.Based on the range analysis of orthogonal test,the optimal combination of sacrificial anode formulation was 0.5%Mg-4%Zn-0.035%In-0.045%Ti,which could significantly increase the current efficiency of the sacrificial anode and improve the dissolution uniformity of the sample.

关 键 词：分离器 铝基牺牲阳极 电流效率 溶解性能 

分 类 号：TG174.41[金属学及工艺—金属表面处理]